1679 results about "Ion migration" patented technology

The invention belongs to the technical field of battery electrolytes, and particularly relates to a gel polymer electrolyte as well as a preparation method and application thereof. The gel polymer electrolyte is prepared through in-situ polymerization, and the electrolyte is composed of a monomer, a cross-linking agent, an initiator, an organic solvent and a lithium salt. The monomer is selected from fluorine-containing monomers such as trifluoroethyl acrylate, 2, 2, 3, 3-tetrafluoropropyl methacrylate and the like, and the cross-linking agent is selected from NH-containing cross-linking agents such as N, N '-methylene bisacrylamide, hexamethylene bisacrylamide and the like, so that a polymer side chain fluorine-containing functional group is formed in situ and interacts with lithium ions, and lithium ion transmission is promoted; and the NH functional group on the main chain limits the migration of anions, so that the ion migration number is increased. Therefore, the copolymerized fluorine-containing monomer and nitrogen-containing cross-linking agent gel polymer electrolyte enables the battery to show good specific discharge capacity and cycling stability under high current density.

The invention provides a self-maintenance system based on single storage battery operation state difference monitoring, which comprises a distributed monitoring module array, each monitoring unit comprises a multi-parameter fusion sensor group, and the distributed monitoring module array is used for acquiring the voltage fluctuation frequency spectrum, temperature gradient distribution, internal resistance change track and electrolyte ion migration rate of a single battery in real time; and the dynamic difference evaluation module is used for processing the multi-dimensional time sequence data by adopting a time sequence convolutional neural network and calculating the operating state difference degree among the monomers. Through the distributed monitoring module array and the multi-parameter fusion sensor group, multi-dimensional data such as the voltage, the temperature, the internal resistance and the electrolyte ion migration rate of the single batteries are collected in real time, and the operation state difference between the single batteries can be accurately quantified in combination with the time sequence convolutional neural network and the dynamic difference evaluation algorithm. Abnormal monomers are effectively identified, and a reliable basis is provided for a subsequent maintenance strategy.

The invention discloses an aluminum electrolytic capacitor state evaluation method and device, and the method comprises the steps: carrying out the frequency scanning measurement of an electrolyte and oxidation film interface, and obtaining the change data of an interface polarization current phase angle along with the frequency; measuring fluid dynamic characteristics of the electrolyte according to the polarization characteristic parameters, and detecting micro-flow response characteristics; according to the flow distribution data and the evolution data, applying a voltage sequence to carry out ion migration kinetic analysis; carrying out microstructure analysis in a preset temperature change process according to the ion distribution characteristics; and according to the structure change data and the dielectric response data, analyzing the change characteristics of the molecular level, the bubble distribution and the overall performance to obtain a stability evaluation result. According to the technical scheme, through multi-dimensional analysis of the interface polarization characteristic, the fluid dynamic characteristic, the ion migration dynamics and the microstructure change of the electrolyte, effective detection of bubbles and layering phenomena in the electrolyte is realized, and accurate evaluation of the performance state of the capacitor is facilitated.

The invention discloses an alkaline battery capable of improving low-temperature discharge performance and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing a positive electrode ring: preparing a positive electrode material from metal-doped composite manganese dioxide, an adhesive and a potassium hydroxide solution; s2, preparing negative electrode zinc paste, mixing and ball-milling nano zinc powder, indium powder and gallium powder into alloyed zinc powder, adding a composite conductive additive, a composite binder and a low-temperature-resistant additive, and stirring and dispersing to form the negative electrode zinc paste; s3, sleeving the positive electrode ring into the steel shell, inserting a diaphragm and injecting electrolyte; and S4, injecting negative electrode zinc paste, and packaging to obtain a finished product. According to the negative electrode zinc paste, the zinc utilization rate can be increased through nano zinc powder alloying, meanwhile, the freezing point is reduced through the low-temperature-resistant additive, and the reaction efficiency and fluidity of the negative electrode zinc paste at the low temperature are improved; ethylene glycol in the electrolyte is combined with nano zirconium dioxide, so that the stability and the ion migration capability can be improved, the discharge performance of the alkaline battery under a low-temperature working condition is improved, and the service life of the alkaline battery under the low-temperature working condition is prolonged.

The invention discloses a storage battery charging control system and a control method thereof, and relates to the technical field of storage battery charging, and the control method comprises the following steps: firstly, comprehensively obtaining multi-modal sensing data from a storage battery; preprocessing the obtained original data, and extracting key features beneficial to identification of lithium ion migration blocking from the preprocessed data under a detection window; and inputting the extracted features into a pre-learned deep learning model, and carrying out intelligent assessment on the lithium ion migration blocking risk in the storage battery charging process through the deep learning model. Multi-modal sensing data and a deep learning model are utilized, the lithium ion migration blocking risk is accurately identified, an electrochemical polarization rapid change factor and an electrode dynamics non-equilibrium factor are extracted to generate a deposition index and classify the deposition index, a charging strategy is dynamically adjusted, high-current charging is carried out during normal migration, and current is reduced during blocked migration. Lithium deposition and dendritic crystal risks are reduced, efficiency and safety are improved, and the service life of the battery is prolonged.

The invention relates to the technical field of solid-state batteries, in particular to oxyhalide solid-state electrolyte as well as a preparation method and application thereof. The method comprises the following steps: taking molten salt LiaMbXc as a raw material, reacting with an oxide AdOf in a molten state, removing steam impurities by utilizing a high-temperature vacuumizing mode, and cooling to prepare the oxyhalide solid electrolyte; according to the invention, the molten salt raw material is molten at high temperature to form the ion melt, and the oxygen element is introduced to replace part of halogen, so that the hardness of the target electrolyte is reduced after cooling, the deformability at room temperature is improved, and the obtained electrolyte is high in conductivity and wide in antioxidant electrochemical window. The prepared oxyhalide solid electrolyte is used for preparing a positive electrode, the adhesion force between the electrolyte and positive electrode material particles, the actual microscopic contact area and the ion migration rate are improved through melt permeation, the problem of a positive electrode interface is effectively relieved, and the electrochemical performance of an all-solid-state battery is improved.

The invention belongs to the technical field of electrochemical materials, and discloses an epoxy resin solid electrolyte as well as a preparation method and application thereof. The preparation raw materials are as follows: 100 parts of epoxy resin, 5-15 parts of an ionic conductive group compound, 5-15 parts of a high ionic conductive lithium salt, 2-20 parts of an ionic liquid, 10-30 parts of a flexible chain segment compound, 1-20 parts of a pore forming agent and 20-50 parts of a curing agent. The ionic conductive group compound comprises a sulfonic compound, a quaternary ammonium salt or a carboxyl compound; the flexible chain segment compound comprises one or more of polyester, polyurethane, polyacrylate, polyacrylic acid, polyamide and polyether-ether-ketone. According to the invention, the epoxy resin is used as a main matrix, the ionic liquid provides an ionic migration path, meanwhile, an ionic conductive group is grafted into an epoxy resin molecule, a flexible chain segment is introduced to reduce the crosslinking density, and the cured electrolyte matrix can form an effective ion channel, so that the conductivity is improved.

The invention discloses a method for passivating a perovskite solar cell by using diphenylamine ammonium salt and a derivative thereof, and belongs to the technical field of perovskite solar cells. According to the method, diphenylamine ammonium salt and a derivative thereof are introduced as an interface modification layer of perovskite through a solution spin-coating process, so that in-situ passivation is realized. The diphenylamino ammonium salt and the derivative thereof can effectively reduce surface defects of perovskite, passivate uncoordinated lead ions, supplement iodine vacancies, significantly reduce non-radiative recombination of a perovskite layer and promote charge extraction by virtue of unique properties of the diphenylamino ammonium salt and the derivative thereof, so that the open-circuit voltage and fill factors of the perovskite solar cell are improved. Meanwhile, large-volume ammonium cations can be gathered on a crystal boundary, so that the defect of the crystal boundary is filled, and ion migration is inhibited. In addition, after passivation, moisture can be effectively prevented from invading the three-dimensional perovskite structure, and the humidity stability and the storage stability of a cell device are remarkably improved. The invention aims at improving the photoelectric conversion efficiency of the perovskite solar cell and realizing the long-term stability of the device performance.

The invention belongs to the technical field of battery positive electrode preparation, and particularly relates to a mixed coating coated nickel-rich layered oxide positive electrode and application thereof. The mixed coating coated nickel-rich layered oxide positive electrode is an NCM system positive electrode material, and the proportion of a Ni material in an NCM ternary system is greater than or equal to 92 wt%; the ratio content of Ni of the nickel-rich layered oxide positive electrode coated with the mixed coating in three elements of Ni, Co and Mn is greater than or equal to 92 mol%; and the nickel-rich layered oxide positive electrode coated with the mixed coating is coated with Li3PO4 and / or Li3BO3 and / or LiNbO3. The positive electrode material provided by the invention can effectively reduce the space charge layer effect and interface side reaction between the positive electrode and the electrolyte, the lithium ion migration efficiency is high, and the cycle performance of the assembled battery is good.

The invention discloses a preparation method and application of a novel ionized water gel-based moisture power generation material. The material is composed of a carbon coating fabric, ionized water gel and a patch metal electrode. Wherein the nano carbon black is used as a conductive filler of the hydrogel and can enhance electric energy output by promoting functional group dissociation and ion migration. The high-hygroscopicity sea salt in the hydrogel can enhance the capture and transmission capability of the material on water molecules in the atmosphere, and ensures the continuous power output capability of the moisture power generation material. Due to the design of the zigzag dry-wet interface, the wettability between the hydrogel and the carbon black coating can be improved, the moisture absorption rate is increased, the contact area is increased, and therefore the power generation power is improved. The metal patch electrode can ensure the stability of long-term power generation of the material, and can be customized to reduce the contact resistance. A moisture power generation device prepared from the material can be used as a passive energy supply device and is suitable for the fields of self-powered sensors, wearable electronic equipment and the like.

The invention relates to the technical field of analysis of physical and chemical properties of soil, in particular to a dry farming soil fertility rapid detection and fertility improvement method, which comprises the following steps: sorting a colloidal phase and a dissolved phase of a humic acid complex based on density difference and dielectric property difference through a gradient centrifugation and dielectrophoresis enriched physical field synergistic separation technology; a two-channel detection time sequence is optimized by adopting a genetic algorithm, a non-overlapping time sequence signal flow is generated by taking a signal interference suppression ratio as a fitness function, and time domain cross interference is suppressed. A programmable resistance-capacitance compensation model is constructed, parallel capacitor array parameters are dynamically adjusted to correct electrochemical phase angle offset, and a three-dimensional fertility distribution curved surface and a residual map are generated in combination with a Kriging interpolation model. On the basis of residual spectrum spatial distribution characteristics, a cross-linked slow-release system is deployed to improve the organic matter binding capacity of a humic acid deficiency area, a mesoporous zeolite-based passivator is applied to regulate and control an ion migration path, a closed-loop feedback mechanism is formed through dynamic phase response monitoring, and accurate detection and directional remediation of soil fertility are achieved.

The invention discloses a self-energy-supply multi-mode sensing electronic skin based on ionic gel heterojunction array integration and a preparation method and application of the self-energy-supply multi-mode sensing electronic skin. The electronic skin adopts a multi-layer composite structure design and comprises an electrode array layer, a silver paste connecting layer, a nano material doped ionic gel array layer and a pure ionic gel continuous layer, and passive self-energized work is realized through a space ion migration effect at a heterogeneous gel interface. The method is characterized in that the design of a multi-layer flexible composite structure is adopted, space-time coded light, temperature, pressure and humidity four-mode stimulation can be synchronously converted into electroneurographic signals, and a collaborative identification strategy of response intensity dynamic range and synaptic learning / delay time difference is utilized; and high-precision decoupling of the multi-source signals is realized in combination with a classification decision tree algorithm. The electronic skin has the characteristics of flexibility, deformation, environment self-repairing and bionic synapse, and geometrical characteristics of a reconfigurable target source are fused through time-space domain multi-modal data.

The invention provides a high-stability lithium-rich manganese-based positive electrode material and a preparation method thereof, and relates to the technical field of lithium-rich manganese-based positive electrode materials, and the method comprises three steps of preparation of a homogeneous precursor, solid-state mechanical fusion doping and coating, and high-temperature sintering; a lithium-rich manganese-based precursor is prepared by adopting a homogeneous coprecipitation process, uniform distribution of metal ions is ensured, then an aluminum source, a zirconium source and a fluorine source are introduced as doping agents, phosphate and a titanate coating agent are combined, doping and coating integrated treatment is realized through mechanical ball milling, and the lithium-rich manganese-based composite material is obtained. And finally, mixing with a lithium source in an argon atmosphere, and carrying out high-temperature sintering of temperature programming and staged heat preservation to form a stable composite coating layer in situ. Therefore, manganese ion migration is effectively inhibited through lattice doping, a layered structure is prevented from being converted into spinel or rock salt phase, meanwhile, a nanoscale ion / electron transmission channel is constructed, interface impedance is reduced, and the charging and discharging efficiency under high voltage is improved.

The invention relates to the technical field of prediction model construction, in particular to a method for constructing a corrosion rate prediction model of a metal material. The method comprises the following steps: acquiring bridge design data, collecting metal material and electrolyte component data, and constructing a bridge protection primary battery simulation model; electrolyte concentration change information is collected by dynamically analyzing water flow fluid and ion migration, so that the potential difference and the current density of positive and negative electrodes of the primary battery are calculated; evaluating the metal corrosion rate of the protection electrode, and establishing a corresponding prediction model; according to the method, multiple steps including metal activity analysis, ion activity estimation, current density calculation and the like are refined, so that the accuracy and reliability of a prediction result are ensured. According to the invention, the metal corrosion rate prediction model is more accurate through the corrosion rate prediction optimization of the metal material.

The invention discloses a composite separation membrane for enriching < 6 > Li isotope and application. The composite separation membrane comprises a functional membrane and at least one supporting membrane; the functional film comprises a plurality of pore channels penetrating through the first surface and the second surface of the functional film, and the pore channel diameter of each pore channel is 0.4-0.7 nm; a lithium ion trapping functional group or a macrocyclic compound and a derivative thereof are modified at an inlet of the first surface of the pore channel. The strength of the lithium isotope separation effect depends on the diameter of a pore channel of the composite separation membrane and functional groups modified at an inlet, does not change along with the migration time and the lithium ion migration proportion, and has long-term continuous stability.

The invention discloses a pulse electroplating detection method, a pulse electroplating device and equipment, and the method comprises the steps: synchronously collecting transient current density data of a three-pole assembly in a pulse switching time window, and calculating a time derivative of a current density ratio to obtain electrochemical stress gradient data; performing space-time correlation analysis on the stress gradient data of the continuous pulse period, and tracking a spatial propagation trajectory of stress anomaly; a key monitoring area is determined according to the propagation trajectory, and ion migration impedance sensitivity distribution is detected through micro-amplitude current modulation; performing multi-dimensional coupling analysis on the stress gradient, the propagation trajectory and the impedance sensitivity data, and identifying time sequence correlation characteristics of stress evolution and ion anomaly; and performing quantitative evaluation and grade division on the electrochemical state of the avoidance area based on the coupling correlation characteristics. According to the scheme, early recognition and predictive evaluation of the ion migration abnormity of the boundary layer of the avoidance area can be realized in the pulse electroplating process, and the electroplating quality control precision and the process stability are remarkably improved.

The invention relates to a composite solid electrolyte and a preparation method and application thereof. The preparation method of the composite solid electrolyte comprises the following steps: S1, mixing an inorganic filler and a fluorine-containing compound, and reacting at 70-90 DEG C under an acidic condition to obtain an inorganic filler wrapped by a fluorinated layer; then adding a fluorine ion complexing agent and a silane coupling agent for reaction to obtain a modified filler; adding a thermal decomposition type cross-linking agent into the polymer, and carrying out melt blending to obtain a cross-linked polymer; s2, uniformly mixing the modified filler, a cross-linked polymer, a lithium salt and a solvent to obtain a plurality of slurries containing the modified filler with different volume concentrations; and molding the slurry to prepare the composite solid electrolyte. According to the method, the fluorinated layer and the siloxane network are constructed step by step, so that the interface impedance is reduced, and efficient dissociation of the lithium salt is promoted; a three-dimensional network structure is combined, so that the tensile strength is improved; the modified filler is further designed in a gradient manner to improve the lithium ion transference number.

The invention discloses an electroplating quality monitoring method, device and equipment for an MLCC capacitor and a medium, and relates to the technical field of MLCC capacitor electroplating. The electroplating quality monitoring method comprises the following steps: firstly, acquiring coating microstructure and ion migration data by adopting X-ray tomography and electrochemical impedance spectroscopy technologies, and performing defect classification in combination with appearance detection data; electroplating process parameters are obtained, and a multi-dimensional feature library is constructed through principal component analysis. Then based on a defect classification result and a feature library, training an improved random forest model to realize multi-defect prediction, screening key process parameters through sensitivity ranking, and establishing defect-parameter association; and then constructing an attribution model to analyze an influence mechanism of process parameters on defects. In actual production, real-time process parameters are input into the prediction model for online quality monitoring; and when defects appear, reversely tracing cause parameters through an attribution model. According to the method, a system of data acquisition, feature fusion, real-time monitoring and defect tracing is formed, and the electroplating quality can be effectively monitored.

The invention discloses a perfluoropolyether blended PEGDE-based solid electrolyte and a preparation method thereof, and belongs to the technical field of lithium metal battery solid electrolyte materials. Adding SnCl4 and TAA into the nanocellulose precursor solution, stirring, carrying out suction filtration, and drying to obtain a SnS2 (at) NC support layer; and mixing and stirring PEGDE, LiDFOB, LiTFSI and PFPE to obtain PEGDE-based solid electrolyte slurry, coating the SnS < 2 > (at) NC supporting layer with the PEGDE-based solid electrolyte slurry, and performing in-situ polymerization in a drying oven to obtain the PEGDE-based solid electrolyte. The ultrathin perfluoropolyether blended PEGDE-based solid electrolyte prepared based on PEGDE in-situ polymerization and perfluoropolyether blending and in combination with nanocellulose enhancement has the advantages of stable anode interface, high mechanical strength, high decomposition voltage and high ion transference number.

The invention discloses a pole piece and a preparation method thereof, a battery and a power utilization system. The pole piece comprises a current collector and an active material layer which are arranged in a laminated manner, the active material layer comprises a plurality of active particles, and the active material layer is further provided with first pores and second pores; the aperture R1 of the first pores and the aperture R2 of the second pores meet the following conditions: 0.05 * D50 < = R1 < 0.65 * D50, 0.65 * D50 < = R1 < = 10 * D50, D50 is the median particle size of the plurality of active particles, and the unit of R1 and R2 is nm. Through the pore distribution structure with matched size, the wettability of the electrolyte in the active material is improved, so that the migration path of ions in the pole piece is optimized, the overall internal resistance of the battery is reduced, and the power performance, the fast charging performance and the low-temperature performance of the pole piece are further improved on the basis of improving the ion mobility.

The invention discloses a method for improving the efficiency of a perovskite solar cell, and belongs to the technical field of solar cells. The insulating spacer film prepared between the electron transport layer and the perovskite layer of the perovskite solar cell by adopting the electron beam evaporation method has high uniformity, the cell interface structure can be optimized, defects are reduced, charge recombination loss is reduced, and the photoelectric conversion efficiency and stability are effectively improved. The insulating spacer layer not only can block external moisture and pollutants, reduce direct contact between the perovskite layer and the electron transport layer and prolong the service life of the cell, but also can inhibit internal ion migration and slow down performance degradation. By accurately regulating and controlling the thickness of the insulating spacer layer, charge transmission optimization and compound loss minimization are realized. An innovative technical path is provided for research and development of efficient and stable perovskite solar cells, and further development of the solar cell technology is expected to be promoted.

The invention belongs to the field of perovskite solar cells, and particularly relates to application of a bulk phase and interface synergistic passivator in a perovskite solar cell. The invention provides a bulk phase / interface synergistic passivation innovative strategy, molecules with a tricyclic sulfur-nitrogen heterocyclic ring structure are introduced as a synergistic passivator, and defect global repair of each functional layer of a device is realized. The molecular design of the structural derivative taking phenothiazine as the core has the following advantages: skeleton characteristics: a conjugated tricyclic system forms an electron transport network through pi-pi stacking, endows molecules with excellent electron delocalization ability, and effectively regulates and controls carrier kinetics; the thioether group is used for dynamically repairing an ion migration channel through oxidation-reduction activity and inhibiting formation of deep-energy-level defects; and the secondary amine group is used as a hydrogen bond donor for anchoring uncoordinated halide ions and synchronously passivating surface and grain boundary defects.

The invention provides a preparation method of a laminated cell, the laminated cell and a photovoltaic module, and can be widely applied to the photovoltaic technical field, the preparation method of the laminated cell comprises the following steps: providing a bottom cell, and forming a composite layer on the bottom cell; a first transmission layer is formed on the composite layer, and a skeleton layer is formed on the first transmission layer through double-source evaporation; wherein a first evaporation source of the double-source evaporation comprises inorganic cesium salt, and a second evaporation source of the double-source evaporation comprises inorganic lead salt and inorganic rubidium salt; coating organic salt on the framework layer to form a perovskite layer; forming a second transmission layer and an electrode on the perovskite layer to obtain a laminated cell; wherein carriers of the first transmission layer and the second transmission layer are different. The framework layer is formed through double-source evaporation, the proportion is better controlled, through rubidium and lead, a positive effect can be generated on crystallization, stress release and the like of perovskite in the crystallization process, part of rubidium salt can be combined with PbI2 decomposed on the surface, ion migration is reduced, and the device stability is improved.

The embodiment of the invention provides a perovskite solar cell and a preparation method and application thereof. The perovskite solar cell comprises a perovskite absorption layer and a vulcanization layer which are arranged in a stacked mode. The material of the vulcanization layer comprises a sulfonium salt organic matter, wherein cations of the sulfonium salt organic matter have a structure as shown in a formula (I). The material of the sulfide layer in the perovskite solar cell is the sulfonium salt organic matter, on one hand, the sulfonium salt organic matter is combined with the surface of perovskite, the stable sulfide layer is formed between the perovskite absorption layer and the carrier transport layer, ion defects are reduced, ion migration is effectively prevented, and the performance and stability of a device are improved; on the other hand, the hydrophobic group of the sulfonium salt organic matter can improve the hydrophobicity of the surface of the perovskite absorption layer, and the moisture resistance of the cell is improved.

The invention relates to the technical field of electronic paste, in particular to copper electrode paste for an NTC thermistor and a preparation method and application of the copper electrode paste. A copper electrode slurry for an NTC thermistor comprises copper powder, an inorganic glass binder, an organic carrier and a dispersant, the inorganic glass binder comprises CuO and NiO, and the organic carrier comprises a polymer thickener. The copper electrode slurry can be coated on the surface of an NTC thermistor ceramic substrate through a silk-screen printing method, can be used as a metallized conductive layer after being sintered in nitrogen, is used for temperature measurement, temperature compensation, temperature control components and the like, and is wide in application. The copper electrode slurry for the NTC thermistor provided by the invention can be sintered in nitrogen at 550-650 DEG C, and has the advantages of wide sintering interval, good sintering appearance, excellent welding performance and strong adhesive force. After sintering, the ohmic contact is good, so that the prepared NTC thermistor can truly reflect the resistance value of a substrate, and the phenomenon of ion migration is avoided.

The invention discloses a cellulose derivative doped perovskite active layer, a preparation method thereof and a perovskite solar cell, and relates to the technical field of solar cells, and the preparation method comprises the steps: dissolving PbI2, PbBr2, CsI, MABr, FAI and MACl in a solvent to obtain a mixed solution; adding HPMCP into the mixed solution to obtain a perovskite precursor solution; and in a protective gas atmosphere, spin-coating the perovskite precursor solution on a substrate, dropwise adding chlorobenzene in the spin-coating process, and heating the substrate after spin-coating to obtain the perovskite active layer. The method has the beneficial effects that the leakage of lead in perovskite is effectively inhibited by utilizing the physical wrapping effect of HPMCP and the strong coordinate bond effect and hydrogen bond effect of perovskite, the quality of a perovskite active layer thin film can be improved, grain boundary defects are effectively passivated, ion migration is inhibited, and good optical performance is achieved; the photoelectric conversion efficiency and the environmental stability of the halogen hybrid perovskite solar cell device are effectively improved.

The present invention relates to an in-situ synthesized high-voltage resistant gel polymer electrolyte, belonging to the technical field of gel polymer electrolytes. The electrolyte is prepared by the following method: in a light-proof protective gas atmosphere with oxygen and water contents less than 1 ppm, PETT and divinyl adipate are added to an electrolyte in a substance ratio of 1: (1-4) to obtain a mixed solution a, wherein the concentration of PETT is (0.2-5) mol / L, and then a free radical polymerization photoinitiator is added and mixed to obtain a mixed solution b, and bubbles in the mixed solution b are removed to obtain a precursor solution; the precursor solution is used to infiltrate the positive electrode material in the positive electrode for 0.5h-2h, and then visible light is used for irradiation for 0.2h-1h to obtain the electrolyte on the positive electrode. The electrolyte has good ionic conductivity and lithium ion migration number, and has a wide electrochemical window, and has good interface compatibility with the positive electrode.

The invention discloses a preparation method of an intrinsically safe polymer electrolyte and a solid-state battery thereof, and belongs to the field of preparation of solid-state lithium metal batteries. The solid polymer electrolyte is of a 1M (xA + yB) + (z1C + z2D) type, x accounts for 14-15 wt%, y accounts for 1-2 wt%, z1 accounts for 70-72 wt%, z2 accounts for 11-12 wt%, A and B are lithium salts, C is a fluorine-containing monomer, D is a cross-linking agent, the fluorine-rich monomer, the cross-linking agent and the lithium salts are mixed, no electrolyte is added, an in-situ thermal polymerization method is adopted to prepare the intrinsic safe solid polymer electrolyte with high safety and high voltage resistance, and meanwhile, the electrolyte is of a three-dimensional chain network structure. Therefore, the safety performance of the electrolyte is effectively enhanced, the migration activation energy of lithium ions is reduced, and the ionic conductivity is improved. The core problems that an existing traditional battery is poor in safety performance, poor in high-voltage tolerance, large in interface impedance, out-of-control in lithium dendrite growth and the like are solved.

According to the portable seawater desalination device provided by the scheme, a miniature magnesium air battery is used as a power supply, and a [Fe (CN6)] < 4-> / [Fe (CN6)] < 3-> redox medium is added into a cathode chamber and an anode chamber of an electrodialysis unit to form a high-concentration redox electrolyte, so that the current density and the ion migration rate are improved. A magnesium electrode is adopted as an anode and cooperates with a miniature magnesium air battery, the electrochemical environment is optimized, efficient and high-water-recovery-rate seawater desalination is achieved, seawater can be stably desalted into fresh water (TDS is smaller than or equal to 1000 mg / L) meeting the drinking water standard, and the seawater desalination device is suitable for outdoor exploration, emergency and other scenes.

The invention discloses a preparation method of a composite solid electrolyte membrane, and belongs to the technical field of solid lithium batteries, the composite solid electrolyte membrane is formed by uniformly stirring and compounding a polymer matrix, a lithium salt, an inorganic filler SiO2 aerogel and a solvent, the ionic conductivity of the membrane can be effectively improved by modifying the molecular structure of a polymer, and the ionic conductivity of the membrane can be effectively improved by using the SiO2 ceramic inorganic filler. The mechanical strength of the composite solid electrolyte membrane is improved; the prepared composite solid electrolyte membrane is good in electrochemical performance, the room-temperature ionic conductivity can reach 2.3 * 10 <-4 > S / cm, the lithium ion transference number can reach 0.78, the composite solid electrolyte membrane has a wide electrochemical window, the preparation process of the composite solid electrolyte membrane is simple, the stability of an interface between the composite solid electrolyte membrane and a positive electrode and a negative electrode of a battery is good, and the composite solid electrolyte membrane can be applied to the field of lithium ion batteries. The assembled total battery has good cycle stability, and the capacity retention rate can reach 82.3% after 400 cycles.