1127 results about "Battery electrolyte" patented technology

The invention discloses deep eutectic gel polymer electrolyte as well as preparation and application thereof, belongs to the technical field of battery electrolyte, solves the problems of low thermal stability, low ionic conductivity and poor mechanical property in the prior art, and comprises a bimetallic salt-eutectic solvent and a polymer chain which are dynamically crosslinked and constructed, the bimetallic salt-eutectic solvent comprises lithium ions, heterogeneous metal salt and Lewis base, and the polymer chain is formed by free radical polymerization, atom transfer radical polymerization (ATRP) or reversible addition-fragmentation chain transfer radical polymerization (RAFT). According to the invention, the deep eutectic solvent is introduced as a reaction solution, so that the organic gel monomer is subjected to photopolymerization or thermal polymerization in the solution, the elongation at break can reach more than 500%, the organic gel has excellent mechanical stretchability, a polymer network is formed by utilizing a long-chain molecular formula of a polymer chain, the deep eutectic solution is wrapped in the polymer network, and the organic gel has excellent thermal stability; and the good ionic conductivity of the electrolyte is ensured.

The invention belongs to the technical field of zinc battery electrolyte, and discloses application of pyridine hydrochloride as an electrolyte additive in stabilizing a zinc negative electrode and realizing four-electron transfer of a zinc-iodine secondary battery. The hydrochloride containing the pyridine structure is used as an electrolyte additive, molecules of the pyridine structure are adsorbed on the surface of the zinc negative electrode to form a shielding layer, the deposition / stripping reversibility of the zinc negative electrode is improved, stabilization of the zinc negative electrode can be achieved, and the problems of zinc dendritic crystal, corrosion and hydrogen evolution are solved. Meanwhile, molecules with pyridine structures can activate and stabilize I- / I0 / I < + > four-electron redox reaction, inhibit I < + > hydrolysis side reaction and improve the energy density and cycling stability of the zinc-iodine battery. The problem of poor electrochemical deposition / stripping reversibility of a zinc negative electrode and the problem of poor stability of positive valence I < + > species of an iodine positive electrode of a four-electron transfer reaction are solved. The electrolyte containing the additive is low in cost, simple in method, easy to produce and high in practical value.

The invention discloses a lithium ion battery electrolyte, a preparation method and application. The lithium ion battery electrolyte comprises a lithium salt and an organic solvent, wherein the lithium salt comprises a combination of at least two of lithium hexafluorophosphate, lithium difluoro bis (oxalato) phosphate, lithium bis (fluorosulfonyl) imide and lithium bis (oxalato) borate, and the organic solvent comprises 30 wt%-50 wt% of hydrofluoroether, 10 wt%-30 wt% of acetate and 20 wt%-60 wt% of carbonate. The lithium ion battery electrolyte provided by the invention can keep the diaphragm structure complete, realizes filling of pores with lithium salt, and reduces the permeability of the diaphragm, thereby controlling possible shrinkage of the diaphragm in a temperature change process under a low-temperature or high-temperature condition; the crosstalk problem caused by gas penetration between the positive electrode and the negative electrode is inhibited, and the battery prepared by utilizing the lithium ion battery electrolyte provided by the invention has good cycle performance and rate capability under a low-temperature condition and has relatively high safety under a high-temperature condition.

A non-woven battery separator and processes for forming the non-woven battery separator includes a fiber blend including cellulose fibers, microfibrillated fibers, and optionally polyester and / or aramid fibers. Also disclosed are batteries including the non-woven battery separator. During fabrication, the non-woven battery separator can be effectively dried at temperatures between 120°C and 180°C, which results in the fibers absorbing water when in use. Some battery electrolytes such as lithium hexafluorophosphate react with water to form hydrogen fluoride (HF), which can be corrosive and shorten battery lifecycles and affect performance. Absorbing water from the electrolyte increases the battery life cycle by reducing HF generation.

The invention discloses an imidazolium ionic liquid modified magnesium ion battery electrolyte and a preparation method and application thereof. The imidazolium ionic liquid modified magnesium ion battery electrolyte is obtained by fully dissolving [EOE-A-Im] [TFSI] ionic liquid in an APC electrolyte. Wherein [EOE-A-Im] [TFSI] is a 1-allyl-3-(2-ethoxyethyl)-1H-imidazole-3-onium bis (trifluoromethylsulfonyl) imine salt, and APC is a total phenyl complex. The imidazolium ionic liquid modified magnesium ion battery electrolyte disclosed by the invention is relatively wide in electrochemical window, excellent in compatibility with electrodes, high in magnesium deposition-dissolution efficiency, low in overpotential and good in cycling stability; and the preparation method of the imidazolium ionic liquid modified magnesium ion battery electrolyte is simple and environment-friendly, and accords with green industrial production.

The invention belongs to the technical field of batteries, discloses a battery electrolyte solvent capable of adapting to a wide temperature range and preparation of a battery, and provides application of a mixed organic solvent as an energy storage battery electrolyte solvent, the mixed organic solvent is composed of tetrahydrofuran, 1, 3-dioxolame and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether, and the 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether is composed of tetrahydrofuran, 1, 3-dioxolame and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether. The volume percent content of the 1, 2, 2-trifluoroethyl ether is 10%-50%. The solvent composition of the energy storage battery electrolyte is improved, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether is introduced into an ether organic solvent (namely tetrahydrofuran and 1, 3-dioxolame) to serve as a diluent, meanwhile, the volume percentage of the diluent is controlled, and the obtained electrolyte solvent formula can adapt to the wide temperature range of the full temperature interval of-130 DEG C to 60 DEG C, so that the energy storage battery electrolyte is suitable for being used as an energy storage battery electrolyte. And the problem of battery failure of the current energy storage battery under the extremely low-temperature and high-temperature conditions can be effectively solved.

The invention belongs to the technical field of magnesium ion batteries, and particularly relates to a magnesium ion battery electrolyte, a preparation method thereof and a magnesium ion battery. The invention provides a magnesium ion battery electrolyte. The magnesium ion battery electrolyte comprises a magnesium salt electrolyte, an amine organic solvent and an imidazole organic solvent. According to the magnesium ion electrolyte, the imidazole and amine organic solvents are used as the mixed cosolvent of the magnesium ion electrolyte, so that the electrolyte magnesium salt can be effectively dissolved, and the problems of decomposition and passivation of the electrolyte solvent and corrosion of a magnesium metal negative electrode can be effectively solved; the amine and imidazole co-soluble magnesium ion electrolyte provided by the invention can realize reversible deposition and dissolution of a magnesium metal negative electrode under the condition of a wide temperature range of-30 to 80 DEG C, and can be applied to a rechargeable magnesium battery.

Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and / or frequency domains. These systems may be additionally responsible for charging and / or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and / or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.

The invention belongs to the field of lithium metal battery electrolytes, and particularly relates to a local high-concentration electrolyte, a preparation method of the local high-concentration electrolyte and application of the local high-concentration electrolyte in preparation of a lithium metal battery. The preparation method comprises the following steps: adding the lithium salt into the solvent, then adding the diluent, and stirring until the diluent is dissolved, so as to obtain the local high-concentration electrolyte. A certain proportion of DME cosolvent is introduced into the electrolyte, so that the concentration of the electrolyte can be diluted while an electrolyte solvation structure is added. When DME is added into an electrolyte solvation structure, a LiFSI-THF / DME-TTE local high-concentration electrolyte can be induced to form a solid electrolyte membrane (SEI) on a lithium metal negative electrode side, formation of lithium dendrites is inhibited, uniform deposition of lithium metal is induced, and the lithium deposition behavior is improved, so that the electrochemical performance of the battery is improved.

Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and / or frequency domains. These systems may be additionally responsible for charging and / or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and / or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.

The invention relates to a lithium iron phosphate battery electrolyte self-circulation regulation and control method and system, and relates to the technical field of battery regulation and control, and the method comprises the steps: constructing an SEI state recognition model and an SEI loss prediction plug-in on the basis of SEI film loss historical data of similar lithium iron phosphate batteries in a cloud server, and deploying the recognition model to a battery management unit; collecting a first cell characteristic data sequence through a sensor according to a preset frequency, inputting the first cell characteristic data sequence into a recognition model of the battery management unit, and outputting an SEI state recognition result; if the state is a loss state, collecting a second battery cell characteristic data sequence, uploading the second battery cell characteristic data sequence to the cloud server, calling a prediction plug-in, and outputting a prediction loss type and a degradation coefficient; and according to an optimized battery charging repair strategy, outputting an adaptive scheme and controlling battery charging to finish active repair of the SEI film. The method solves the problems that the traditional method is difficult to monitor the loss in the dynamic evolution of the SEI film in real time, so that the repairing effect is poor, and the service life, safety and efficiency of the battery are influenced.

The invention provides an intelligent response nano-film and application thereof in waste lead-acid storage battery electrolyte recycling, and relates to the technical field of waste lead-acid storage battery electrolyte recycling, the intelligent response nano-film breaks through performance limitation of an existing film system through a specific intelligent material structure, and when heavy metal ions such as Pb < 2 + >, Fe < 3 + > and Cu < 2 + > enter the film, the intelligent response nano-film can be recycled, and the service life of the intelligent response nano-film is prolonged. The metal ligands are combined with metal ions to cause local shrinkage or closing of pore channels, so that the active defense and intelligent blocking effects of blocking heavy metals are achieved; and when SO4 < 2-> and H < + > pass through the channel, membrane pore channels are kept in an open state, so that rapid acid flux (namely the amount of substance passing through the membrane layer in unit time) of sulfuric acid is realized. The intelligent response nano film has a programmable aperture of a polymer liquid crystal network and an intelligent response valve mechanism of metal, and selective separation of heavy metal and sulfuric acid is realized by stimulating reversible adjustment of an induced film structure.

The invention belongs to the technical field of lithium / sodium batteries, and particularly relates to a method for pre-embedding lithium / sodium into a battery. The preparation method comprises the following steps: firstly, preparing a lithium / sodium pre-embedded material of the lithium / sodium battery, namely putting a sodium salt of the material into an organic solvent, dropwise adding acid, stirring for reaction, extracting and drying, and evaporating the solvent to dryness; placing the product in deionized water, adding lithium salt, stirring for reaction, and evaporating the solvent to dryness; recrystallizing the solid by using ethyl acetate and dichloromethane; and drying the obtained solid powder to obtain a final material. Dissolving the prepared lithium / sodium pre-intercalation material in a battery electrolyte to realize lithium / sodium pre-intercalation of the battery; the sodium salt of the material takes organic sodium sulfinate as a skeleton, and side groups are substituted with different alkyl groups or aryl groups; the prepared lithium / sodium pre-embedded material is high in specific capacity, good in compatibility with a battery system and good in material stability; lithium / sodium pre-embedding is carried out on the battery through an electrolyte adding method, the lithium / sodium pre-embedding process is safe and convenient, the process is simple, the cost is low, and large-scale production can be realized.

The invention relates to the technical field of solid-state batteries, and discloses an optimized preparation method of a solid-state battery electrolyte, a composition comprises a lithium source, a lanthanum source and a zirconium source, and the molar ratio of lithium to lanthanum to zirconium is (7.0-8.0): 3.0: 2.0; the use amount of the photoacid generator accounts for 0.5-5.0 mol% of the total molar weight of the metal ions; and an organic solvent. The method comprises the following steps: S1, placing a substrate in a high-pressure reaction kettle, and injecting the precursor composition in a supercritical carbon dioxide (scCO2) environment; s2, irradiating the surface of the substrate with ultraviolet rays, performing photolysis on the photoacid generator to generate acid, and catalyzing the metal precursor to be decomposed and deposited into an amorphous film; and S3, taking out the substrate after pressure relief, and carrying out low-temperature heat treatment at 400-700 DEG C to obtain the solid electrolyte film. Through combination of photochemical deposition and a supercritical fluid technology, the problem of decomposition of a positive electrode material caused by high temperature in a traditional process is solved.

In order to solve the problems of large cycle expansion and short cell cycle life of the existing silicon-based negative electrode lithium ion battery, the invention provides an electrolyte and a battery, the electrolyte comprises a polymer, the polymer comprises a flexible structure unit and a rigid structure unit, the flexible structural unit comprises one or more of an acrylic ester structural unit, an epoxy structural unit, a nitrile structural unit and a polyurethane structural unit; the rigid structural unit comprises one or more of a siloxane structural unit, an amide structural unit, a silane structural unit and an alkene structural unit containing lithium salt; the structural formula of the alkene structural unit containing the lithium salt is as shown in formula 1; in the formula 1, the substance amount ratio of the flexible structural unit to the rigid structural unit is (1: 10)-(10: 1).

The invention provides a double-phase diaphragm-free zinc-bromine battery electrolyte, a preparation method and application, belongs to the technical field of energy storage batteries, and aims to solve the problems that an organic solvent of an existing double-phase diaphragm-free zinc-bromine battery electrolyte has safety risks, the solubility of active substances is not high, and the service life of the battery is prolonged. And when a specific ionic liquid is used as an organic phase, the bromine fixation function is single. Imidazole bromine salt and zinc bromide are jointly dissolved in water, and an ionic liquid phase and a water phase are formed by adjusting the adding amount of the zinc bromide. The solubility of the bromine species in the ionic liquid phase is far greater than that in the water phase, and the imidazole bromine salt can be complexed with the bromine species to form a polybromine complex, so that the ionic liquid phase can be used as a positive electrode electrolyte of a two-phase zinc-bromine battery. The raw materials of the prepared dual-phase electrolyte all participate in the electrode reaction of the zinc-bromine battery, bromine species are dissolved and fixed in an ionic liquid phase under the condition that other organic solvents or ionic liquid is not introduced, diffusion of the bromine species to a water phase is reduced, and the self-discharge phenomenon of the zinc-bromine battery is reduced. And the preparation method of the electrolyte is simple, greatly simplifies the manufacturing process of the battery, and is easy to popularize and apply.

The invention discloses a sodium secondary battery, electrolyte and electric equipment, the sodium secondary battery comprises a positive pole piece, electrolyte and a negative pole piece, the positive pole piece comprises a positive current collector and a positive active material layer arranged on at least one side of the positive current collector, and the negative pole piece comprises a negative active material layer arranged on at least one side of the negative current collector. The positive electrode active material layer comprises a first positive electrode active material layer and a second positive electrode active material layer which are sequentially stacked in the direction away from the positive electrode current collector, the first positive electrode active material layer comprises a first positive electrode active material, and the second positive electrode active material comprises a second positive electrode active material; the second positive electrode active material comprises Na4M3 (PO4) 2P2O7, and M comprises at least one of Fe, Co, Mn or Ni; the electrolyte includes a solvent including a linear ether and a cyclic ether. According to the sodium secondary battery, the generation of sodium dendrites can be reduced, and the cycle life is prolonged.

The invention discloses a battery electrolyte and a preparation method thereof, an aqueous zinc-iodine battery and terminal equipment. The battery electrolyte comprises an additive, an electrolyte and a solvent, the additive contains an amino functional group, and the concentration of the additive is 0.1 g / L-0. 5 g / L. In addition, the additive can also utilize a nitrogen-containing functional group to reduce the shuttle effect of polyiodide and prevent the loss of an iodine positive active material, so that the electrode of the zinc ion battery is protected, and the cycle life of the zinc ion battery is remarkably prolonged (the capacity is about 20mAh / g higher than that of an electrolyte without L-tyrosine).

The invention provides a supercritical lithium metal battery electrolyte with electric field adaptability and application, and belongs to the technical field of lithium metal batteries. Comprising a lithium salt, a main solvent and a diluent, has the characteristic of adaptively stabilizing a lithium metal negative electrode under the action of an electric field, and is a supercritical state electrolyte obtained by dissolving the lithium salt in the main solvent to form a solution with the concentration being greater than or equal to 5 mol / L and diluting the solution with the diluent; the main solvent is at least one of chain ester, chain ether and siloxane, the diluent is hydrofluoroether, and the volume ratio of the main solvent to the diluent is 1: (0.5-20). The lithium metal negative electrode shows stable self-adaptive capacity under the action of an electric field, and formation of lithium dendrites is inhibited by promoting decomposition of anions at the negative electrode to form SEI rich in inorganic components, so that long-time stable circulation of a high-voltage lithium metal battery is realized.

The invention relates to the technical field of electrolyte repair, in particular to an online electrolyte repair device and method. The device is used for repairing the vanadium battery electrolyte with unbalanced valence state. The device comprises a first storage tank, a repairing electric pile and a flow direction adjusting assembly, the first storage tank is used for containing repair liquid; the repairing electric pile comprises a positive electrode side and a negative electrode side which are separated by a diaphragm; the positive electrode side is provided with a first interface and a second interface, and the first interface and the second interface are both connected to the first storage tank; the negative electrode side is connected to a second storage tank for containing the electrolyte to be repaired in the vanadium battery energy storage system; and the flow direction adjusting assembly is used for adjusting the flow direction of the repairing liquid in the positive electrode side. According to the device, the carbon felt structure and the repairing liquid circulation mode are optimized, so that the discharge of reaction gas in the repairing electric pile can be promoted, and the repairing efficiency of the vanadium battery electrolyte is further ensured.

The present invention relates to electrolyte repair and discloses a method for repairing an unbalanced battery electrolyte. The method comprises: mixing the anolyte and catholyte of an unbalanced battery to obtain a mixed electrolyte I; preparing a pentavalent ion electrolyte of metal cations in the mixed electrolyte I; mixing the pentavalent ion electrolyte with the mixed electrolyte I to obtain electrolyte II; obtaining RGB information of electrolyte II, wherein the amount of pentavalent ion electrolyte is such that the blue channel value in the RGB information of electrolyte II is maximized, to obtain electrolyte III; dividing electrolyte III into two portions, with one portion serving as the catholyte and an acid solution serving as the anolyte, and performing constant current electrolysis to obtain electrolyte IV; introducing an oxidizing gas into electrolyte III to oxidize the divalent metal cations to trivalent cations to obtain electrolyte V; and mixing the other portion with electrolyte V in equal volumes. This repair method has excellent repair effects and can improve the utilization efficiency of the unbalanced battery electrolyte.

The invention discloses an organic long-chain zinc salt for a zinc secondary battery electrolyte and a preparation method and application thereof. The organic long-chain zinc salt comprises a long-chain group, an acidic group and zinc ions, the long-chain group comprises at least one of substituted or unsubstituted C8-16 alkyl groups, and the acidic group comprises at least one of a sulfonic acid group, a phosphoric acid group and a sulfuric acid group. The organic long-chain zinc salt serving as an electrolyte salt of the zinc secondary battery can be adsorbed on the surface of zinc to form a protective layer, so that the cycle life and the capacity retention ratio of the zinc secondary battery are effectively improved.

The invention provides a solid-state battery electrolyte material, a preparation method thereof and a solid-state lithium ion battery. The preparation method comprises the following steps: S1, carrying out first reaction on a first raw material comprising an organic ligand, zircon salt, a first acid solution and a first organic solvent to obtain a metal organic framework material; and step S2, carrying out a second reaction on a second raw material comprising dimethyl 2, 6-dipicolinate and a metal organic framework material to obtain the solid-state battery electrolyte material. The solid-state battery electrolyte material obtained by adopting the preparation method disclosed by the invention has good mechanical properties, a wider electrochemical window and higher ionic conductivity, so that the initial efficiency, the capacity and the cycle performance of the battery are improved, and the internal resistance of the battery is reduced at the same time.

The invention relates to an aqueous zinc-iodine battery electrolyte containing an amino acid additive and a preparation method and application thereof, and belongs to the technical field of aqueous zinc-iodine batteries. The preparation method of the aqueous zinc-iodine battery electrolyte containing the amino acid additives comprises the following steps: fully stirring and mixing zinc salt, D-penicillamine and deionized water according to a certain proportion to obtain the aqueous zinc-iodine battery electrolyte containing the amino acid additives. The amino acid-containing additive D-penicillamine used in the invention is preferentially coordinated with I-, and due to the lack of free I-in the reaction, the generation of polyiodide and the dissolution of I2 are inhibited, so that the shuttle effect is inhibited; the amino acid-containing additive D-penicillamine also participates in a Zn < 2 + > solvation sheath layer, so that the tendency of desolvation and Zn < 2 + > migration is improved, and the generation of zinc negative electrode byproducts is inhibited; in addition, the aqueous zinc-iodine battery electrolyte containing the amino acid additive D-penicillamine is simple in preparation method and low in cost.

The invention discloses a lead-acid storage battery electrolyte density measuring device, and belongs to the technical field of battery measurement, the lead-acid storage battery electrolyte density measuring device comprises a detection mechanism, the detection mechanism comprises a connecting column and a tuning fork mechanism, the tuning fork mechanism comprises a tuning fork base and a tuning fork sensor, and the tuning fork mechanism is sleeved with a double-layer isolation mechanism; the double-layer isolation mechanism comprises an inner cover mechanism and a microporous outer cover mechanism, a microporous material of the outer cover mechanism enables the electrolyte to penetrate through the outer cover mechanism and block bubbles, and the inner cover mechanism enables the electrolyte to turn and flow many times to make contact with the tuning fork sensor through an inner cover first channel and an outer cover second channel which are arranged in a staggered mode. The tuning fork mechanism is sleeved with the double-layer isolation mechanism, the outer cover mechanism adopts a microporous material to achieve electrolyte permeation and bubble blocking, the inner cover forces electrolyte to flow circuitously through the staggered channel design, the double structures cooperatively eliminate bubble attachment and inhibit turbulence interference, and it is ensured that frequency signals of the tuning fork sensor are stable; and the measurement precision and sensitivity are obviously improved.

The invention provides an aqueous zinc ion battery electrolyte, a preparation method thereof and a zinc ion battery, and belongs to the technical field of aqueous zinc ion batteries. The aqueous zinc ion battery electrolyte comprises an additive, an inorganic zinc salt and a solvent, the additive comprises at least one of trimethylamine substituted by 1-3 substituent groups, benzene and C3-C10 straight-chain alkane, and the substituent groups comprise phosphonic acid groups or phosphinic acid groups; the solvent comprises a sodium chloride aqueous solution. By adopting the additive with a specific structure and the solvent containing the sodium chloride aqueous solution, the cycle performance of the zinc negative electrode in the water-based zinc ion battery can be remarkably improved, and the service life of the water-based zinc ion battery is prolonged.

According to the parking battery energy distribution optimization method and system, the initial flowing direction of battery electrolyte is calculated by monitoring the three-axis acceleration and angular speed of a vehicle in real time, and electrolyte concentration gradient distribution is simulated and predicted in combination with fluid mechanics. And when the concentration gradient exceeds a threshold value, dynamically dividing an electrode area and optimizing an activation proportion, synchronously calculating current density distribution and an electrochemical reaction rate, and deducing the real-time output power of the battery by using an equivalent circuit model. By comparing real-time power requirements of electric equipment, a pulse width modulation technology is adopted to generate an initial energy distribution scheme, switching frequency distribution of an electrode activation area is finely adjusted based on current density requirements, and finally dynamic regulation and control of the battery management system on electric energy output are achieved. According to the method, the problem of output power fluctuation caused by non-uniform electrolyte distribution due to vehicle shaking in a parking state is effectively solved, and the energy distribution efficiency and the power supply stability of the battery with the special-shaped structure under a complex working condition are greatly improved.

The invention relates to the technical field of lithium-oxygen batteries, in particular to a lithium-oxygen battery electrolyte and a preparation method thereof. The lithium-oxygen battery electrolyte comprises an organic solvent, an electrolyte lithium salt and a multifunctional additive, the multifunctional additive is prepared by introducing an MOF material, a boron nitride nanosheet and an ionic liquid, coating of the boron nitride nanosheet and introduction of the ionic liquid improve the stability of the multifunctional additive, and the stability of the multifunctional additive is improved. The 1-ethyl-1-methylpyrrolidinium bis (trifluoromethylsulfonyl) imine can effectively play a role for a long time, efficiently captures and stabilizes oxygen free radicals generated in the charging and discharging process, reduces the oxidative degradation of the oxygen free radicals to a positive electrode binder, prolongs the cycle life of the battery, improves the overall battery performance, and improves the battery performance. Powerful support is provided for commercial application of the lithium-oxygen battery.

The invention relates to the technical field of aqueous zinc ion batteries, in particular to an aqueous zinc ion battery electrolyte as well as a preparation method and application thereof. The invention provides an aqueous zinc ion battery electrolyte. The aqueous zinc ion battery electrolyte comprises soluble zinc salt and fulvic acid, and the concentration of the fulvic acid in the electrolyte is 0.01-50 g / L; wherein rich oxygen-containing functional groups contained in fulvic acid molecules can serve as strong coordination sites to be combined with Zn < 2 + > to generate coordination, so that the migration rate of zinc ions is effectively reduced, and uniform deposition of the zinc ions on the surface of the negative electrode is promoted; meanwhile, direct contact between water molecules and the zinc negative electrode can be reduced by utilizing a molecular interface layer formed by fulvic acid molecules on the surface of the zinc negative electrode, so that water-induced side reaction can be relieved. And the cycle stability of the battery is improved through the effects. In addition, the fulvic acid is wide in source, low in cost and environment-friendly, the production cost of the water-based zinc ion battery is reduced, and large-scale application of the water-based zinc ion battery is promoted.

The invention discloses a wide-voltage wide-temperature-range sodium-ion battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium-ion battery electrolytes.The wide-voltage wide-temperature-range sodium-ion battery electrolyte comprises sodium salt, an organic solvent and an additive, the organic solvent is selected from one or more of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether and triethylene glycol dimethyl ether, and the additive is selected from one or more of fluoroethylene carbonate, allyl-1, 3-propane sultone, 1, 3-propylene sultone, 1, 3-propylene sultone and 1, 3-propylene sultone. The additive is one or more of 1, 3-propyl sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol bicyclic sulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, acesulfame sodium and aluminum trifluoromethanesulfonate, and the additive is one or more of 2, 3-propylene sultone, methylene methane disulfonate, ethylene sulfate, trifluoromethanesulfonic anhydride, pentaerythritol dicyclosulfate, tri (trimethylsilane) phosphate, tri (trimethylsilane) phosphite, tri (trimethylsilane) borate, tri (trimethylsilane) phosphate and tri (trimethylsilane) borate. The electrolyte provided by the invention not only keeps high coulombic efficiency at low temperature, but also has good cycle stability at high temperature.