151 results about "Liquid lithium" patented technology

The invention relates to a liquid lithium battery simulation method and device considering stress action and a storage medium in the technical field of lithium battery simulation, and the method comprises the following steps: constructing a mechanical model for describing the relationship between the deformation of electrode particles and environmental stress in an electrochemical reaction process, including the acting force of an electrolyte on the electrode particles; constructing an electrochemical model for describing the diffusion process of lithium ions in the electrode particles; coupling the electrochemical model with the mechanical model to obtain an electrochemical-mechanical coupling model; and simulating the performance parameters of the battery based on the electrochemical-force coupling model. The liquid electrolyte binding effect is introduced to reflect the stress change of the electrode material in the circulation process, and the electrochemical reaction and mechanical behaviors are coupled to simulate the concentration change of lithium ions at all positions in the electrode particles in the charging and discharging process, so that the model can accurately predict the performance and the service life of the battery.

The invention discloses a tantalum-doped lithium metal composite negative electrode and a preparation method thereof. The preparation method comprises the following steps: melting solid-state lithium metal into liquid-state lithium metal; the tantalum metal is added into the liquid lithium metal to be mixed and stirred, the tantalum-doped lithium metal composite material is obtained after standing and cooling, and the adding amount of the tantalum metal is 0.1-10 wt% of the mass of the liquid lithium metal; and rolling the tantalum-doped lithium metal composite material to obtain the tantalum-doped lithium metal composite negative electrode, so that the tantalum is introduced into the lithium metal through a melt doping process, and the formed tantalum-doped lithium metal composite negative electrode can inhibit the growth of lithium dendrites and prolong the cycle life of the battery.

The invention discloses a preparation method of a solid-state battery unit and a solid-state battery containing a composite multifunctional electrolyte layer, multifunctional integration of a single-layer electrolyte is realized through a composite material system, and compared with a traditional PE / PP diaphragm system, the proportion of an inorganic material in the composite electrolyte layer is greater than 90%, and the composite electrolyte layer has excellent high-temperature resistance and can be used for preparing a solid-state battery. And the structural integrity is kept when the battery is possibly subjected to thermal runaway. The localized adding mode of the ionic liquid and the conductive salt is optimized, and high-temperature degradation is avoided; the manufacturing process is simplified, tight interface contact between the electrolyte layer and the electrode is ensured, and impedance is reduced. Compared with a traditional liquid lithium ion battery, the solid-state battery prepared by the invention has the liquid content of less than 1%, and has high safety and cycle performance. The problems that an electrolyte layer in a traditional solid-state battery is single in function (for example, only ion conduction is concerned), the interface impedance is large, the thermal stability is poor, and the mechanical strength is insufficient are mainly solved, and the comprehensive performance and safety of the battery are improved.

The invention belongs to the technical field of electrolyte, and particularly relates to a method for preparing liquid lithium hexafluorophosphate from sodium hexafluorophosphate. The method comprises the following steps: adding a sodium source into a hexafluorophosphoric acid aqueous solution for neutralization reaction to obtain a sodium hexafluorophosphate aqueous solution, then extracting to remove water, drying to obtain a sodium hexafluorophosphate solid, and heating and decomposing the sodium hexafluorophosphate solid to obtain phosphorus pentafluoride gas; the phosphorus pentafluoride gas is not mixed with SO3, POF3, HF and other impurity gases, a complex refining and purifying process is not needed, and the phosphorus pentafluoride gas with the purity exceeding 99.9% can be obtained after simple purification and can be directly used for synthesizing liquid lithium hexafluorophosphate. The method does not generate waste acid, does not need a complicated phosphorus pentafluoride gas purification process, is particularly suitable for the requirements of the lithium battery industry on high-purity electrolyte, and has the remarkable advantages of high product purity, small environmental pollution, low production cost and the like.

The invention relates to a composite lithium supplement material, a preparation method thereof and a secondary battery, the composite lithium supplement material comprises a packaging shell and a liquid lithium supplement agent, the packaging shell encloses a cavity, the liquid lithium supplement agent is accommodated in the cavity, and the packaging shell is used for controlling lithium ions in the liquid lithium supplement agent to release and supplement lithium. The composite lithium supplement material can solve the problems that a lithium supplement agent is unstable in air and the lithium supplement performance becomes poor when the lithium supplement agent is dissolved in an electrolyte.

The invention provides a single-crystal cobalt-free lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a cobalt-free lithium-rich manganese-based precursor material, a lithium source and a grain boundary separation auxiliary agent to obtain a mixed material; the mixed material is subjected to two-stage sintering, the two-stage sintering comprises first sintering and second sintering in sequence, and the single-crystal cobalt-free lithium-rich manganese-based positive electrode material is obtained, wherein primary crystal grains of the cobalt-free lithium-rich manganese-based precursor material are of a sheet structure. According to the invention, the cobalt-free lithium-rich manganese-based precursor material of which the primary crystal grains are of a sheet structure is taken as a raw material, and under the action of the grain boundary separation auxiliary agent, a two-stage sintering process is cooperatively matched, so that the single-crystal cobalt-free lithium-rich manganese-based positive electrode material which is uniform in grain size, high in dispersity, complete in crystal grains and continuous in interface is obtained, and the cobalt-free lithium-rich manganese-based positive electrode material is not only suitable for a liquid lithium ion battery, but also suitable for a lithium ion battery. The material is more suitable for a solid-state lithium ion battery, and the electrochemical performance of the battery is effectively improved.

The invention discloses an ultrafast charge liquid lithium metal battery electrolyte, relates to the technical field of lithium ion battery preparation, and aims to solve the problem of poor fast charge performance of a current semi-solid or all-solid battery, the electrolyte is composed of a solvent and a lithium salt, and the total molar concentration is 0.5-2M; wherein the solvent is one or a mixture of two of fluoroacetonitrile and N, N-dimethyl trifluoroacetamide, and the lithium salt is one or a mixture of two of lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethanesulfonyl) imide. The ultrafast-charging liquid lithium metal battery electrolyte can be matched with a high-nickel positive electrode and a lithium metal negative electrode, is high in energy density and good in rate capability, and can promote the application of a liquid lithium metal battery.

The invention relates to the technical field of battery materials, in particular to a preparation method of a lithium sulfide material. The preparation method of the lithium sulfide material comprises the following steps: S1, mixing lithium carbonate and sodium sulfide, heating to a first heating temperature to melt lithium carbonate and react with sodium sulfide, separating out a solid phase, and collecting a first solid; s2, the first solid is heated to a second heating temperature, the second heating temperature is higher than the melting point of sodium carbonate and lower than the melting points of lithium sulfide and sodium sulfide, a solid phase is separated out, and a second solid is collected; s3, the second solid is heated to a third heating temperature, the third heating temperature is higher than the melting point of lithium sulfide and lower than the melting point of sodium sulfide, a liquid phase is separated out, and a liquid lithium sulfide material is prepared; and S4, carrying out curing treatment on the liquid lithium sulfide material to prepare a solid lithium sulfide material. The preparation method improves the reaction conversion rate, simplifies the process flow, reduces the cost and improves the product purity.

The present invention discloses a continuous production process of liquid lithium hexafluorophosphate, and relates to the technical field of lithium ion battery electrolyte. The whole process of this process is carried out under nitrogen sealing conditions. After liquid anhydrous hydrogen fluoride and liquid chlorine are introduced into a microchannel mixer for mixing, they are introduced into a primary tubular reactor together with phosphorus trichloride liquid for reaction, and the generated gas is introduced into a gas-liquid separator and a condenser to obtain phosphorus pentafluoride gas, which is continuously introduced into a secondary tubular reactor to react with a lithium fluoride solution to generate an unsaturated solution of lithium hexafluorophosphate; the generated lithium hexafluorophosphate solution is adsorbed by a trifluoromethyl hydrogen type macroporous cationic resin, the trifluoromethyl hydrogen type macroporous cationic resin is filtered to remove, the filtrate is crystallized and dried, and the dried lithium hexafluorophosphate crystals are prepared as liquid lithium hexafluorophosphate. This process realizes the continuous production of liquid lithium hexafluorophosphate, improves the safety in the production process, effectively improves the product quality, and meets policy requirements.

The invention discloses a casting method for improving appearance surface quality of metal lithium, which comprises a flow guide device, a casting pipe mechanism, a mold, a lithium liquid conveying pipeline and an oil coating mechanism, the flow guide device is placed on the mold, and the flow guide device comprises a flow guide sleeve, a flow guide rod, four flow dividers, four inner connecting plates, four outer connecting plates and a fixing plate; the casting pipe mechanism comprises a casting pipe inlet and a casting pipe outlet; the liquid metal lithium casting device is reasonable in design and convenient to use, liquid metal lithium casting is achieved, liquid lithium flows out of a mold base plate in the casting process, the downward flow speed of lithium liquid is reduced through the internal structure of the flow guide device, and small lithium beads splashed when the lithium liquid impacts the base plate are blocked by the flow guide sleeve; the purpose of reducing the splashing speed and range of the lithium liquid is achieved, scars are avoided, the casting quality of a lithium ingot is improved, bubbles are avoided, and meanwhile the problem that other flow guide tools cannot be taken out due to the fact that the lithium liquid is rapidly solidified and embedded in metal lithium is solved.

The invention provides a preparation method of liquid-state lithium bis (fluorosulfonyl) imide, and relates to the technical field of organic synthesis.The preparation method comprises the steps that bis (fluorosulfonyl) imide acid, ester substances and a non-aqueous solvent are mixed to form a mixed solution, and lithium carbonate is dropwise added into the mixed solution for a reaction to obtain a liquid-state lithium bis (fluorosulfonyl) imide solution. According to the invention, the imidodisulfuryl fluoride acid and the ester substance are used as raw materials, and the obtained liquid imidodisulfuryl fluoride lithium product does not need to be subjected to additional water removal, so that the quality of the product is improved, and meanwhile, the synthesis process is simple.

The invention discloses a preparation method of liquid lithium tetrafluoroborate, which comprises the following steps: fluorating anhydrous lithium chloride by anhydrous hydrogen fluoride in an organic solvent to obtain lithium fluoride, then introducing boron trifluoride gas or adding a boron trifluoride complex, and reacting to obtain a lithium tetrafluoroborate liquid; the preparation process is simple and efficient, the adopted raw materials are very easy to obtain, meanwhile, the fluorination reaction and the lithium tetrafluoroborate synthesis reaction are sequentially carried out in an organic solvent environment, the whole reaction process is safe, stable and reliable, and the preparation method is very suitable for large-scale batch popularization and application; and the lithium tetrafluoroborate liquid with a low acid value can be directly obtained and can be directly applied as an electrolyte additive.

The invention belongs to the field of electrode materials, and particularly relates to a three-dimensional porous copper-lithium composite negative electrode and a preparation method thereof. The method comprises the steps that (1) a copper-zinc alloy net is taken to be subjected to heat treatment, and a pretreated alloy net is obtained; (2) the pretreated alloy net is placed in a non-lithium salt solution to be subjected to dipping dealloying treatment, and a porous copper-based alloy net is obtained; (3) the porous copper-based alloy net is placed in a lithium salt solution to be treated, and a pretreated porous alloy net is obtained; and 4) placing the pretreated porous alloy net in molten lithium salt for melt impregnation to obtain the three-dimensional porous copper-lithium composite negative electrode. A porous structure beneficial to lithium deposition is effectively formed in a controllable corrosion mode, liquid lithium infiltration can be promoted in combination with ion exchange, a more complex nano structure is constructed and formed in the solidification forming process, and construction of the three-dimensional porous copper-lithium composite negative electrode with the large specific surface area and electrochemical activity is achieved.

The invention relates to a tank car transporting and conveying system for liquid lithium salt. The preparation method comprises the following steps: adding solid lithium hexafluorophosphate into an organic solvent to prepare a saturated solution of lithium hexafluorophosphate; then adding solid lithium hexafluorophosphate, the prepared saturated solution and a liquid stabilizer into a tank car together to form a supersaturated suspension of lithium hexafluorophosphate in the tank car; transporting the supersaturated suspension of lithium hexafluorophosphate in the tank car to an unloading area, and unloading; the liquid stabilizer disclosed by the invention is prepared by reacting polyether methacrylate PEM-1066, dilithium carbamate phosphate, (Z)-3-tributyltin alkyl acrylate, triethylamine and DMF (Dimethyl Formamide). According to the invention, the material state is a solid-liquid mixed state, the defect of low efficiency of transporting the solid material by a ton bucket is avoided, and more solid lithium hexafluorophosphate can be transported at one time compared with the conventional liquid salt tank car; and compared with traditional liquid salt tank car transportation, the transportation amount is larger, and the transportation cost is saved.

A degassing device and method for liquid lithium hexafluorophosphate, the degassing device comprising: a scraper evaporator (E201), a post-degassing concentration and collection tank (V301), a condenser (E202), a solvent collection tank (V303) and a vacuum pump (P103), wherein the scraper evaporator (E201) is connected to a conveying line for raw liquid lithium hexafluorophosphate. The raw liquid lithium hexafluorophosphate is heated by the scraper evaporator (E201) and undergoes a rotational centrifugal force of same; thus, part of the liquid is vaporized, and the vaporized material is conveyed into the condenser (E202). The unvaporized liquid is conveyed to the post-degassing concentration and collection tank (V301). An output end of the condenser (E202) is connected to the solvent collection tank (V303), and a gas-phase output end of the solvent collection tank (V303) is connected to the vacuum pump (P103). Thus, an efficient and excellent degassing effect is achieved, it is ultimately ensured that the content of hydrogen chloride in liquid lithium hexafluorophosphate after a degassing treatment is less than 10 ppm, and the performance of the liquid lithium hexafluorophosphate when used as a component of an electrolyte in lithium ion batteries is also ensured.

The invention discloses a new energy battery fire extinguishing material based on cyanated selenotetrafluoroquinone. The new energy battery fire extinguishing material is prepared from the following raw materials in percentage by weight: 10 to 12 percent of cyanated selenotetrafluoroquinone, 78 to 82 percent of PFPE / HFE mixed carrier, 4 to 6 percent of ZIF-8 coated zinc borohydride and 3 to 5 percent of WSe2 nanosheets. The invention further discloses the fire extinguishing material and application of the fire extinguishing material in a battery fire extinguishing agent. The fire extinguishing material can be stably stored in a daily environment of-45 DEG C to 60 DEG C (viscosity is less than or equal to 30cP, vapor pressure lt; the high-efficiency fire extinguishing performance is kept in the whole thermal runaway process of the battery at the temperature of 60-800 DEG C, and integrated electron capture (llt; 50 ms), free radical quenching (lt; 800ms), slow-release cooling (lt); the thermal runaway is blocked in the whole process within 3 seconds, and the differential protection requirements of a liquid lithium ion battery, a sulfide / oxide solid-state battery and a lithium metal battery are met.

The present invention is disclosed, belonging to the technical field of nuclear fusion raw material recovery. A cold trap recovery device for fusion reactor raw materials, a raw material recovery system and a method thereof according to the present invention include a cold trap recovery tower having a cold trap recovery chamber inside, and the cold trap recovery tower is provided with a fluid inlet, a gas outlet and a fluid outlet; a diversion recovery member vertically arranged in the cold trap recovery chamber of the cold trap recovery tower; a heating assembly for heating the diversion recovery member; at least one diversion inlet is provided above the diversion recovery member in the cold trap recovery chamber of the cold trap recovery tower, and at least one diversion outlet is provided below the diversion recovery member; the diversion inlet is opposite to the upper end of the diversion recovery member; the diversion outlet is opposite to the lower end of the diversion recovery member; along the length direction of the diversion recovery member, crystal capture members are protruded outward around its periphery. The main use of the present invention is to release the fuel particles retained in the liquid lithium and simultaneously purify the liquid lithium.

The invention relates to the technical field of lithium hydride preparation processes, in particular to a lithium hydride hydrogen storage material and a synthesis process thereof.The synthesis process comprises the steps that high-purity metal lithium is cut, cleaned and then dried in an inert atmosphere, obtained high-purity metal lithium particles are put into an evaporation device, and gradient heating is conducted in the inert atmosphere to obtain lithium steam; adding the activated catalyst into a reaction kettle, cooling the lithium steam to obtain liquid lithium, introducing the liquid lithium into the reaction kettle, introducing high-purity hydrogen, heating to react, and cooling to obtain lithium hydride; putting into crushing equipment, crushing in an inert atmosphere, and sieving to obtain lithium hydride particles; and packaging and carrying out quality inspection to obtain the lithium hydride hydrogen storage material. According to the lithium hydride hydrogen storage material and the synthesis process thereof, liquid-gas reaction of liquid lithium and hydrogen avoids continuous influence of passivation films such as an oxide layer and a nitride layer on the surface of solid lithium, and finally the lithium hydride hydrogen storage material with high purity and high activity is prepared.

In order to solve the safety problem after formation of the semi-solid lithium ion battery, the invention provides an electrolyte and the semi-solid lithium ion battery, the electrolyte comprises the following raw materials: a lithium salt, an organic solvent, a polymeric monomer, a cross-linking agent and an initiator, the polymeric monomer is one or more of substances shown in the following structural formula, and n is an integer between 1 and 6. According to the semi-solid lithium ion battery obtained by in-situ polymerization of the electrolyte, after formation, the battery can meet the safety in the recycling process, and meanwhile, the cycle performance basically equivalent to that of a liquid lithium ion battery is obtained.

The invention relates to a preparation method of liquid lithium hexafluorophosphate, which comprises the following steps: in a reactor, taking a non-aqueous organic solvent as a dispersing agent, taking simple substance phosphorus, phosphorus oxide (not containing hydrogen) or phosphorus halide as a phosphorus source, taking lithium halide as a lithium source, carrying out one-pot fluorination reaction on excessive F2-containing gas at 5-20 DEG C for 50-350 minutes, and carrying out flash evaporation to remove the solvent after the reaction is finished, so as to obtain a lithium hexafluorophosphate solid; and dissolving the solid product in an ester organic solvent, filtering, and removing impurities from resin to obtain the liquid lithium hexafluorophosphate. The method has the advantages of simple process flow, low cost, high fluorination efficiency, high product yield, high purity and the like.

The invention belongs to the technical field of material preparation, and particularly relates to a preparation method and application of a nanoscale lithium-silicon alloy. Silane gas and diluent gas are mixed and injected into a plasma thermal field generated by a radio frequency plasma generator to generate silicon atoms, then inert gas serves as carrier gas, a lithium source is fed into the plasma thermal field to generate lithium atom steam, and the silicon atoms and the lithium atom steam are alloyed in the high-temperature thermal field; under the driving of cooling airflow, the lithium-silicon alloy particles enter the cyclone classification chamber through high-temperature and low-temperature cooling areas, the unreacted lithium source and the large-particle-size lithium-silicon alloy particles are retained in the cyclone classification chamber, and the small-particle-size lithium-silicon alloy particles are brought into the collection chamber, are adsorbed on the surface of the filter and are blown off by periodic back-blowing airflow; lithium silicon alloy powder to be coated is obtained; and finally, the nano lithium silicon alloy to be coated is introduced into the fluidized bed, silicon and carbon coating is conducted through a vapor deposition method, the lithium silicon alloy with the inner coating layer being element doped silicon and the outer coating layer being carbon is prepared, and the alloy can be used as a thermal battery, a solid-state battery negative electrode material and a liquid lithium ion battery lithium supplementing agent.

The application discloses a fusion reactor liquid blanket tritium breeding rate online regulation system simulation method and device, wherein the simulation device comprises a fusion blanket neutron transport module, a blanket breeding agent Monte Carlo-activation coupling burnup simulation module, a blanket coolant feeding module, a blanket tritium extraction module, a blanket coolant purification treatment module, a blanket tritium breeding rate calculation module and a blanket tritium breeding agent circulation system; the simulation device realizes the circulation of the blanket coolant nuclide based on the mass conservation equation and the burnup equation. The application is based on the Boltzmann neutron transport equation, the neutron flux of the blanket coolant is simulated by a Monte Carlo method, the time and space variation law of the chemical composition of the system material is obtained by solving the burnup equation, the replenishment demand of the blanket coolant system is calculated, and the influence of the replenishment composition on the blanket tritium breeding rate is simulated, so that the application can be widely applied to the fusion reactor liquid lithium lead blanket.

The utility model discloses a distillation reaction device for preparing liquid lithium bis (fluorosulfonyl) imide, which is characterized in that 1-3 feed pipes are arranged at the top of an evaporation tank main body, a steam output pipe is also arranged at the top of the evaporation tank main body, a temperature detector is arranged on the steam output pipe, a material output pipe is arranged at the bottom of the evaporation tank main body, and the temperature detector is arranged on the material output pipe. A constant-temperature electric heater is arranged at the bottom of the interior of the evaporation tank main body, and the distillation reaction device for preparing the liquid lithium bis (fluorosulfonyl) imide improves the conditions that in the actual use process in the prior art, evaporation is only performed on the surface of liquid under the condition that boiling is not performed in the heating process, and the evaporation efficiency is limited by the surface area of the liquid; through a spraying mode, the surface area of liquid evaporation is greatly increased, the evaporation efficiency is improved, and the overall working efficiency of equipment and an assembly line is improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a composite in-situ solid electrolyte and a secondary lithium battery. Compared with the prior art, the composite in-situ solid electrolyte has the advantages that the sulfonate cross-linking agent and the amidated vinyl carbonate monomer are compounded, and the constructed composite in-situ solid electrolyte has excellent oxidation resistance and is compatible with high-specific-energy battery cell systems such as high-nickel lithium cobalt oxide and high-pressure lithium cobalt oxide; the composite in-situ solid electrolyte does not contain perfluoroalkyl groups and meets the European Union standard; the composite polymer electrolyte can be combined with other special monomers for use, is completely compatible with the current liquid lithium battery production process, and can meet the customization requirements of different battery cell systems; the composite in-situ solid electrolyte contains a relatively large proportion of low-electronegativity elements, and the ion conduction capability of the composite in-situ solid electrolyte is remarkably superior to that of a traditional polymer electrolyte; the sulfonate cross-linking agent can improve the high-temperature stability of the polymerized electrolyte, can ensure that the structure is not changed at high temperature, and further embodies the dynamic advantages.

The utility model discloses a liquid lithium hexafluorophosphate sampling device which comprises a sampling assembly, the top of the sampling assembly is in threaded connection with an extraction mechanism, a pre-sampling treatment assembly is arranged in the extraction mechanism, the sampling assembly comprises a liquid sampling bin, the extraction mechanism comprises a bin cover, the pre-sampling treatment assembly comprises a nitrogen cylinder, and the nitrogen cylinder is in threaded connection with the extraction mechanism. And a first gas outlet pipe is arranged on the surface of the nitrogen cylinder. According to the lithium hexafluorophosphate sampling device, through the arrangement of the pre-sampling treatment assembly, before sampling, air in the liquid sampling bin is completely exhausted in a water injection mode, then nitrogen is introduced into the liquid sampling bin, so that the liquid sampling bin is filled with nitrogen which does not react with lithium hexafluorophosphate at normal temperature, and then the air pressure in the liquid sampling bin is reduced in an air exhaust mode; therefore, sampling is completed, air remaining in the liquid sampling bin is avoided, and a sample detection result is more accurate.

The utility model discloses a constant temperature device for liquid lithium bis (fluorosulfonyl) imide reaction, a reaction tank is connected with the constant temperature device through a heat output pipe and a heat input pipe, the reaction tank further comprises a water bath layer, an inner output pipe, a heat conduction pipe and an inner input pipe, the water bath layer is communicated with the inner output pipe and the inner input pipe, and the heat conduction pipe is communicated with the inner input pipe. According to the constant-temperature device for the liquid lithium bis (fluorosulfonyl) imide reaction, the conditions that substances such as hydrochloric acid which is easy to volatilize after being heated still exist in reactants in the actual use process in the prior art, the reaction temperature needs to be controlled, loss caused by material volatilization is reduced, and meanwhile, the reaction temperature is controlled to be beneficial to forward proceeding of the reaction are improved; the constant temperature device is arranged, so that reactants can be kept at a set temperature, the volatilization of materials can be effectively reduced, and meanwhile, the reaction efficiency can also be improved.

The invention discloses a low-cost solid electrolyte of a molecular sieve composite polymer binder as well as a preparation method and application of the low-cost solid electrolyte, and belongs to the technical field of electrochemistry and solid-state batteries. A low-cost solid electrolyte of a molecular sieve composite polymer binder is composed of molecular sieve powder and an ionic conductive polymer binder, and the molecular sieve powder comprises at least one of transferable lithium ions, sodium ions or potassium ions. The slurry coating film-forming technology adopted by the invention is highly compatible with the electrode coating process of the existing liquid lithium ion battery, a high-temperature sintering step does not need to be introduced, the existing battery production line equipment can be used for transformation and upgrading, and the industrialization threshold and the equipment investment of the solid-state battery are greatly reduced.

The invention relates to an asymmetric double-layer flame-retardant solid electrolyte as well as a preparation method and application thereof. According to the asymmetric double-layer flame-retardant solid electrolyte as well as the preparation method and the application thereof, the problems that an electrolyte in a liquid lithium ion battery is easy to leak, great potential hazards exist, and the conductivity of a polymer electrolyte membrane is low can be solved. The first layer of the asymmetric double-layer flame-retardant composite solid electrolyte comprises the following main components: a polymer matrix A, a polymer matrix B, zwitterionic liquid SPZ, an inorganic ceramic oxide, a lithium salt, a solvent, a cross-linking agent and a photoinitiator; the first-layer solution and the second-layer solution mainly comprise a polymer base B, zwitterionic liquid SPZ, lithium salt, a solvent, a cross-linking agent and a photoinitiator, the first-layer mixed solution and the second-layer mixed solution are respectively subjected to tape casting onto a polytetrafluoroethylene mold, ultraviolet cross-linking and heating are performed to obtain two-layer ionic liquid composite solid electrolyte, and then the two layers are sequentially stacked together to obtain the composite solid electrolyte. The asymmetric double-layer flame-retardant composite solid electrolyte is obtained.

The embodiment of the present application discloses a kind of lithium battery control device and control method, wherein lithium battery control device includes, liquid lithium battery loop, solid-state lithium battery loop, voltage sensor and control part;Liquid lithium battery loop and solid-state lithium battery loop are in parallel;Liquid lithium battery loop includes liquid lithium battery pack and first control switch;Liquid lithium battery pack and first control switch are in series;Solid-state lithium battery loop includes solid-state lithium battery pack, second control switch and current-limiting resistor;Solid-state lithium battery pack, second control switch and current-limiting resistor are in series;Solid-state lithium battery loop further includes third control switch;Second control switch and current-limiting resistor are in parallel with third control switch;The embodiment of the present application solves the problem that battery pack voltage is not matched when liquid lithium battery pack and solid-state lithium battery pack are used together, while realizing that the life of liquid lithium battery pack and solid-state lithium battery pack is nearly consistent.

The invention relates to a lithium ion battery with a high capacity retention rate, and a preparation method and charging and discharging methods thereof. The lithium ion battery comprises a positive electrode plate, a negative electrode plate, separators arranged between the positive electrode plate and the negative electrode plate at intervals, and an electrolyte, and further comprises a third electrode and a fourth electrode, which are independent of each other and provided between the positive electrode plate and the negative electrode plate, wherein the third electrode and the fourth electrode are separated by means of a single-layer separator, a metal lithium electrode being used as the third electrode, and an activated carbon electrode being used as the fourth electrode. The third electrode and the fourth electrode cooperate with each other to realize supplementation of active lithium of a lithium ion battery at different stages by means of controlled use at different stages, thereby achieving repair and regeneration of the lithium ion battery, and finally, comprehensively increasing the long-cycle capacity retention rate of the current lithium ion battery, especially a solid-liquid lithium ion battery, and increasing the cruising ability retention rate of an electric vehicle.