551results about "Aqueous electrolytes" patented technology

The invention discloses an electrolyte for an aqueous manganese-based battery. The electrolyte comprises an electrolyte, and the electrolyte comprises a manganese salt; the weak acid is used for regulating and controlling proton dynamic release of the positive electrode / electrolyte interface to realize on-demand supply of protons of the positive electrode / electrolyte interface; and a solvent, wherein the solvent is deionized water; the PH range of the electrolyte is 2.0-3.5, and the electrolyte can realize on-demand supply of protons of a positive electrode / electrolyte interface in the charging and discharging process of the aqueous manganese-based battery, and promotes efficient and reversible deposition and dissolution reaction of a positive active substance manganese dioxide. According to the invention, the proton on-demand supply electrolyte is constructed by utilizing dynamic dissociation equilibrium of weak acid, so that on-demand supply of protons in the MnO2 dissolving process is realized, complete electrochemical dissolution of MnO2 is promoted, and generation of'dead manganese 'is inhibited, so that the cycling stability of the battery and the utilization efficiency of active substances are remarkably improved. The invention also discloses an aqueous manganese-based battery for realizing on-demand supply of protons and application of the aqueous manganese-based battery in the field of secondary energy storage.

The invention discloses a functionalized carbon quantum dot modified all-vanadium redox flow battery electrolyte. The functionalized carbon quantum dot has a large specific surface area and a carboxyl functional group on the surface; the electrolyte of the flow battery is a dilute sulfuric acid solution of vanadium; the main evaluation indexes of the electrochemical performance are the cycle efficiency, the capacity retention ratio and the battery performance of the electrolyte; the invention aims to discuss the catalytic action of the surface functional groups of the functionalized carbon quantum dots on the oxidation-reduction reaction of vanadium ions in the electrolyte of the all-vanadium redox flow battery by using the functionalized carbon quantum dots as an additive of the electrolyte. Meanwhile, the influence of the concentration and doping of the carbon quantum dots on the electrochemical performance of the electrolyte of the all-vanadium redox flow battery is researched, so that the working efficiency and the overall performance of the battery are improved, the characteristics of the electrolyte are improved, and the energy consumption of the battery is reduced.

The invention provides eutectic aqueous aluminum ion battery electrolyte as well as a preparation method and application thereof, and relates to the technical field of aluminum ion batteries. According to the invention, the eutectic aqueous aluminum ion battery electrolyte is prepared by solid-solid mixing and dissolving of aluminum metal salt and eutectic substances; the aluminum metal salt is selected from at least one of aluminum chloride hexahydrate, aluminum perchlorate nonahydrate, aluminum nitrate nonahydrate and aluminum sulfate octadecahydrate; the eutectic substance is an organic small molecule compound containing amino and ester groups. By screening hydrated aluminum metal salt and eutecticevaporate substances and regulating and controlling the proportion, the prepared electrolyte is applied to aqueous aluminum ion batteries, such as symmetrical batteries and total batteries, and shows excellent performance. According to the electrolyte, the stability of the aluminum ion battery can be improved, a solvation structure dominated by anions is formed, and meanwhile, a compact anion-rich solid electrolyte interface layer is formed on the surface of an aluminum negative electrode to protect the aluminum negative electrode. The problem that an existing water-based aluminum ion battery negative electrode is poor in stability is solved.

The invention relates to the technical field of preparation of an electrolyte for a vanadium redox flow battery, in particular to a reduction method of an alkaline vanadium-containing solution during short-process preparation of a vanadium electrolyte. The reduction method comprises the following steps: (1) adding a reducing agent sodium sulfite into an alkaline vanadium-containing solution and dissolving; and (2) acid is added into the solution obtained after dissolving in the step (1), the pH is adjusted, a reduction reaction is conducted, and vanadium is reduced to be tetravalent. The method provided by the invention effectively solves the problem of vanadium loss caused by precipitation generated in the sequential operation process of acidification and reduction of the alkaline vanadium-containing solution in the prior art, and meanwhile, the method provided by the invention is easy for engineering implementation.

The invention relates to the technical field of water-based energy storage batteries, in particular to a two-phase electrolyte for a water-based zinc ion battery and a preparation method of the two-phase electrolyte, and the two-phase electrolyte comprises soluble zinc salt, water and quaternary ammonium nitrate; the soluble zinc salt comprises one of zinc trifluoromethanesulfonate, zinc bis (trifluoromethylsulfonyl) imide, zinc acetate, zinc sulfate and zinc chloride, and the molar concentration of the soluble zinc salt is 1-5 mol / L; the quaternary ammonium nitrate is one or more than two of tetramethylammonium nitrate, tetraethyl ammonium nitrate, tetrabutyl ammonium nitrate, hexadecyl trimethyl ammonium nitrate and octadecyl trimethyl ammonium nitrate, and the molar concentration of the quaternary ammonium nitrate is 1-3 mol / L. The preparation method is simple, convenient and efficient, the reversibility of the zinc anode is optimized, the method is crucial for promoting the design of a practical water-based zinc ion battery, and the application of the zinc-based battery in the field of energy storage is further accelerated.

The invention relates to a composite additive for an all-vanadium redox flow battery electrolyte and a preparation method and application thereof, the composite additive comprises an organic ligand, organic sulfonate, phosphate and halide, and the molar ratio of the organic ligand to the organic sulfonate to the phosphate to the halide is 1: (1-2): (1-2): (1-10). Through the synergistic effect of the four added components, the precipitation problem of divalent vanadium ions under a low-temperature condition and pentavalent vanadium ions under a high-temperature condition is remarkably improved, the high-temperature stability of the positive electrode electrolyte and the low-temperature stability of the negative electrode electrolyte of the all-vanadium redox flow battery are effectively improved, the service life of the battery is prolonged, and the service life of the battery is prolonged. Meanwhile, through the synergistic effect of the four effective components, the use amount of the additive is reduced, and the use cost of the additive is reduced.

The invention discloses a zinc-bromine flow battery electrolyte, a negative electrode cosolvent and a preparation method thereof, and belongs to the technical field of electrochemical energy storage, the negative electrode cosolvent of the zinc-bromine flow battery electrolyte is a carboxyl-containing butenoic acid substance, the butenoic acid substance is used as the cosolvent, and zinc is induced to preferentially deposit on a (002) plane by modifying a solid-liquid interface, so that the zinc-bromine flow battery electrolyte is obtained. And the deposition process of zinc is converted from an irregular form which tends to form a dendritic crystal shape and a moss shape into a deposition layer which tends to form a flat and compact deposition layer which is parallel to the substrate. The highly uniform zinc deposition fundamentally and effectively inhibits the formation and growth of zinc dendrites, and greatly improves the stability of the negative electrode and the cycle life of the battery. Chlorides improve ionic conductivity to reduce internal resistance, and sodium acetate buffer inhibits hydrogen evolution on stable pH; and synergistic optimization of positive and negative components ensures efficient reaction. And moreover, the raw materials are easy to obtain, the preparation is simple and convenient, the industrialization threshold is reduced, and the large-scale energy storage requirement is met.

The invention discloses a ruthenium-substituted doped manganese dioxide positive electrode material for a zinc ion battery as well as a preparation method and application of the ruthenium-substituted doped manganese dioxide positive electrode material. The cathode material has the following chemical composition: KxMn1-yRuyO2. ZH2O (0.2 < = x < = 0.5, 0.01 < = y < = 0.2, and 0 < = z < = 0.5). The transition metal ruthenium is adopted to carry out atomic-scale substitution doping on the manganese dioxide positive electrode material, Mn < 4 + > in the [MnO6] octahedron is substituted by the transition metal ruthenium, a Ru-O chemical bond is formed, the electronic structure and the crystal structure of manganese dioxide are regulated and controlled, and the electronic conductivity and the structural stability of manganese dioxide are enhanced. The ruthenium-substituted doped manganese dioxide positive electrode material shows improved rate capability and excellent cycling stability in an electrochemical performance test, and is a relatively ideal zinc ion battery positive electrode material. In addition, the material is simple in preparation process method, good in repeatability, high in yield and suitable for large-scale production and practical application.

The invention discloses sodium titanate with a layered crystal structure, a preparation method of the sodium titanate and application of the sodium titanate in a water-based magnesium ion battery, and belongs to the technical field of water-based magnesium ion batteries. According to the invention, the sodium titanate with a layered crystal structure is used as the negative electrode material of the aqueous magnesium ion battery, and due to excellent chemical and structural stability, the sodium titanate can realize reversible Mg < 2 + > intercalation / deintercalation in an aqueous magnesium electrolyte. According to the invention, Na2Ti2O5 and Na2Ti3O7 materials are synthesized by a hydrothermal method and a high-temperature annealing process. In a magnesium chloride electrolyte, the two sodium titanate materials both show extremely low charge and discharge potentials (Na2Ti2O5,-1.3 to-0.6 V vs.SCE; sCE (-1.5 to-1 V vs.SCE) and relatively good cycling stability are achieved. In addition, the charge-discharge specific capacity of the Na2Ti2O5 half cell under the current density of 2A / g is up to 213mAh / g, and the high specific capacity of 150mAh / g is still kept under the high current density of 10A / g. The sodium titanate is an ideal aqueous magnesium battery negative electrode material, has the advantages of low cost and environmental friendliness, and has a great application prospect in the field of aqueous magnesium ion energy storage.

Provided herein are methods of purifying graphite comprising: electrochemically treating graphite comprising an impurity selected from the group consisting of metals, metal oxides, and combinations thereof in the presence of an electrolyte; a portion of the impurities is removed by electrochemical treatment and purified graphite is provided. Also provided are purified graphite provided by such a method, as well as a negative electrode and a battery each comprising the purified graphite.

The invention discloses an interface corrosion resistant aqueous electrolyte and a battery application thereof. The aqueous electrolyte comprises a zwitterionic additive; the zwitterionic additive comprises an imidazolium cation part and a sulfonate anion part; wherein a 1-site N atom in imidazolium is connected with a sulfonate radical through a C1-6 saturated alkyl carbon chain, and a 3-site N atom in imidazolium is connected with a C2-4 unsaturated alkyl carbon chain or a C1-4 saturated alkyl carbon chain. The aqueous electrolyte can effectively relieve the interface corrosion problem of the aqueous battery, so that the cycle stability of the negative electrode is improved, and the preparation of the long-cycle aqueous battery is realized.

The invention belongs to the technical field of flow battery energy storage, and discloses a multifunctional electrolyte for a zinc-bromine flow battery, a preparation method and the zinc-bromine flow battery, and the multifunctional electrolyte for the zinc-bromine flow battery comprises bromine salt, a conductive additive, water, choline bromide and N-methyl-N, N-bis (2-hydroxyethyl)-1-propylamine bromide. The molar ratio of the choline bromide to the N-methyl-N, N-bis (2-ethoxyl)-1-propylamine bromide is (0.5 to 9): 1. Based on a'synergistic 'effect and an'antagonistic' effect of a polyhydroxy structure and a choline group, effective balance between homogeneous phase performance, anti-freezing performance and the like of the electrolyte can be realized, so that the performance of a battery is improved.

The invention belongs to the technical field of zinc ion batteries, and particularly discloses a degradable gel electrolyte zinc ion battery, which is prepared by the following steps: preparing a gel electrolyte from a polyethylene-polypropylene copolymer and a hydrolyzable / photolytic polymer, taking aluminum-doped vanadyl phosphate as a positive electrode, and taking zinc as a negative electrode. The polyethylene-polypropylene copolymer as a matrix material provides excellent chemical stability and mechanical toughness, and polylactic acid is modified to introduce hydrophilic groups, so that not only are high mechanical strength and biocompatibility retained, but also a channel and an interface beneficial to zinc ion transmission are constructed. The degradable electrolyte and the degradable flexible quasi-solid-state zinc ion battery are designed, so that the safety and the reliability of the battery are improved, and the flexible quasi-solid-state zinc ion battery is suitable for being applied to various electronic equipment needing flexibility and degradability.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

This invention relates to a biomass-based gel electrolyte membrane, its preparation method, and its application. The method includes preparing regenerated cellulose using a sol-gel method, adding sodium alginate and zinc chloride solution, and rapidly constructing a biomass-based composite gel electrolyte with a dual-network structure through metal ion coordination crosslinking. The biomass-based gel electrolyte membrane is obtained by adsorbing an aqueous electrolyte onto a gel membrane with a dual-network structure. This gel electrolyte membrane is then assembled with a zinc anode and a vanadium pentoxide cathode to obtain a zinc-ion battery. This invention features a simple method, readily available and inexpensive raw materials, easy product molding, convenient operation and control, and is conducive to industrial production. The prepared composite gel electrolyte membrane has a dual-network structure, exhibiting good stability, liquid retention capacity, and ionic conductivity, and demonstrates excellent cycle capacity and lifespan when applied to aqueous zinc-ion batteries.

The invention discloses a high-cycle-performance aqueous battery, which comprises an aqueous electrolyte, a negative electrode, a first positive electrode and a second positive electrode, wherein the first positive electrode and the second positive electrode are positioned on two sides of the negative electrode, and a first diaphragm and a second diaphragm are respectively arranged between the first positive electrode and the negative electrode and between the second positive electrode and the negative electrode; the battery is provided with an electromagnetic valve, the electromagnetic valve is electrically connected with the first positive electrode and the second positive electrode to control switching of the positive electrodes in the charging and discharging loop, and every time discharging and charging circulation are completed, the electromagnetic valve switches the electrode connection relation, and the first positive electrode and the second positive electrode are alternately connected into the charging and discharging loop. Switching of the two positive electrodes in the aqueous battery is accurately controlled through the electromagnetic valve, a positive-negative battery structure is formed in real time, the double positive electrodes alternately perform lithium removal-lithium intercalation reaction, excessive Li intercalation or insufficient positive electrode reduction caused by long-term charging and discharging of a single positive electrode is avoided, the structural stability of the positive electrode material is improved, and the service life of the battery is prolonged. The cycle life and the electrochemical performance stability of the aqueous battery are obviously improved.

The invention discloses a chloride ion battery for realizing bromine / chlorine synergistic chemistry and a preparation method thereof, and belongs to the technical field of redox batteries. The chloride ion battery takes graphite paper coated with vanadium pentoxide and graphite as a positive electrode, wherein the mass ratio of the vanadium pentoxide to the graphite is (0.5: 1)-(2: 1); zinc foil is used as a negative electrode, and an electrolyte is a mixed aqueous solution of tetramethylammonium chloride and lithium bromide. A double-halogen system of a V2O5-graphite composite positive electrode is adopted, chlorine species are chemically stabilized through the action of bromine, BrCl is generated in the charging process to inhibit Cl2 formation, and meanwhile, the intercalation energy barrier of chlorine is reduced; according to the salt-in-water electrolyte based on tetramethylammonium chloride, an electrochemical window is expanded to 3.0 V, and BrCl hydrolysis is effectively inhibited. The high-voltage halogen ion battery prepared by the method can realize a 2.3 V discharge platform, provides a specific capacity of 600mAh g <-1 >, has a capacity retention rate of 90% after 200 cycles, and opens up a safe development path for the high-voltage halogen ion battery without toxic gas emission. In addition, the battery system is simple in structure and has remarkable cost benefits.

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 an aqueous zinc ion battery for regulating and controlling zinc anode crystal orientation through a serine additive, which comprises an electrolyte containing a zinc salt and a serine additive, the crystal orientation of the zinc anode is dominated by the (101) crystal face; and the cathode and the zinc anode form an electrochemical reaction system. The preparation method of the aqueous zinc ion battery comprises the following steps: S1, preparing an electrolyte; s2, etching the zinc anode; s3, preparing a cathode; and S4, assembling the battery. The invention also discloses an application of the aqueous zinc ion battery in an energy storage system, an electric automobile or portable electronic equipment. According to the cell, through specific interaction between serine molecules and the surface of the zinc anode, zinc is induced to grow along a specific crystal face, the deposition behavior is optimized, meanwhile, side reactions are inhibited, the cycle life of the cell is remarkably prolonged, and the efficiency and safety of the cell are remarkably improved.

The invention relates to the technical field of all-vanadium redox flow batteries, and discloses a supported electrolyte of all-vanadium redox flow battery positive and negative electrolyte and a preparation method thereof, and the supported electrolyte comprises an aqueous solution containing vanadium ions, sulfonate ions, sulfate ions and phosphonic acid groups. The sulfonic acid group (-SO3H) has strong polarity and high ionization degree, after the sulfonic acid group (-SO3H) is mixed with the phosphonic acid group (-PO3H2) and sulfuric acid, the ionic environment of the electrolyte can be optimized, the activation energy of V (II) / V (III) and V (IV) / V (V) electricity on electron transfer is reduced, and compared with an existing sulfuric acid supported electrolyte, the reversibility of electrochemical reaction is remarkably improved, and the electrochemical activity of the electrolyte is enhanced; meanwhile, phosphonic acid groups have high complexing ability, can form stable chelates with vanadium ions and can form complexing-dispersing synergy with sulfonic acid groups, the solubility of the vanadium ions is improved, and agglomeration and crystallization of the vanadium ions are inhibited.

The invention discloses a method for preparing a vanadium electrolyte by electrochemistry-ultrasonic synergistic reduction of a waste vanadium catalyst in the technical field of solid waste resource utilization, which comprises the following steps of: roasting the waste vanadium catalyst by NaOH and leaching by sulfuric acid, applying 80Hz pulse current by adopting a titanium-based lead dioxide anode and a graphite cathode in a three-chamber electrolytic bath, synchronously starting a 25kHz and 300W ultrasonic field for synergistic reduction, and controlling the reaction temperature to be 35 + / -2 DEG C until the V < 5 + > concentration is less than 0.05 g / L; and then adding a chitosan-tea polyphenol composite stabilizer, and concentrating through a PVDF (Polyvinylidene Fluoride) ultrafiltration membrane to obtain electrolyte with the vanadium concentration of 1.8 mol / L, wherein the molar ratio of V < 4 + > to V < 3 + > is 1: 1.2, Fe < 3 + > is less than 15 ppm, and Al < 3 + > is less than 10 ppm. In the process, the vanadium recovery rate reaches 95.2%, the energy consumption is 2.8 kWh / kg vanadium and is reduced by 65% compared with that of a traditional process, and the cycle life of the electrolyte is prolonged to 1200 times or above.

The invention relates to an electrolyte for synergistically stabilizing positive electrode iodine multi-electron reaction through four-combination zinc salt and a high-surface-capacity zinc-iodine soft package battery. The electrolyte comprises the four-combination zinc salt and water, in the electrolyte, the total concentration of zinc ions in the four combinations of zinc salts is 2 + / -0.2 mol / L; the four-combination zinc salt is a four-combination zinc salt; the SO4 < 2-> in the electrolyte buffers the pH value of a system, so that side reaction of a negative electrode is reduced; cH3COO <-> can be cross-linked with I3 <->, so that shuttling of polyiodide is inhibited, and reversibility of a two-electron reaction is enhanced; bromide ions Br <-> in the electrolyte are chemically combined with I < + > through isohalogen to excite four-electron reaction; the trifluoromethanesulfonate OTf <-> with strong electronegativity surrounds the positive electricity I < + > by virtue of an ion atmosphere effect, so that active water molecule attack hydrolysis failure is avoided, a synergistic stable positive electrode iodine multi-electron reaction is realized, and the high-surface-capacity zinc-iodine soft package battery is beneficial to promoting the development of the zinc-iodine battery to practical application.

The invention provides a preparation method and application of a composite gel electrolyte, and relates to the technical field of electrochemical energy storage, and the preparation method comprises two steps of preparation of MXene-SiO2 and preparation of the composite gel electrolyte. Etched MXene, CTAB (cetyltrimethyl ammonium bromide) and NaOH are mixed and stirred, then TEOS (tetraethyl orthosilicate) is added to react under a water bath condition, washing and freeze drying are performed to obtain a required target product MXene-SiO2, and the composite gel electrolyte comprises a polymer monomer, a cross-linking agent, an initiator, zinc salt and a proper amount of MXene-based additive. The problem of poor compatibility between the solid electrolyte and an electrode interface can be improved, so that the cycle performance of the zinc ion battery is improved. The composite gel electrolyte obtained by the invention has the characteristics of high thermal stability and the like, and has high ionic conductivity, wide electrochemical window and good mechanical durability.

The invention belongs to the field of aqueous zinc ion batteries, and provides a zinc composite negative electrode and a preparation method and application thereof. The zinc composite negative electrode is provided with a current collector layer and two zinc foil layers, the current collector layer is arranged between the two zinc foil layers, the surface of the current collector layer is provided with a metal coating, metal is one or more than two of Bi, Ni, Sn, Te, MXene and a carbon material, and the current collector layer and the zinc foil layers are combined in a physical rolling mode. The composite negative electrode is used for the zinc ion battery, so that the service life of the zinc ion battery is prolonged, and the coulombic efficiency of the zinc ion battery under the high zinc utilization rate can be improved. Button-type and soft-package zinc ion batteries assembled by using the electrolyte have excellent cycle life. The preparation process is simple and is suitable for large-scale production.

An activatable dressing of the present disclosure comprises a biocompatible battery including a magnesium-based (Mg) anode; a silver / silver chloride-based (Ag / AgCl) cathode; and a sodium chloride (NaCl) impregnated separator disposed between the anode and cathode in a dry state, the separator comprising an inlet pad configured for introduction of a water-based fluid to the separator for activation of the battery. The activatable dressing further comprises stimulation electrodes electrically coupled to the Mg anode and Ag / AgCl cathode.

The invention discloses aqueous zinc ion battery electrolyte containing an amino acid additive and application of the aqueous zinc ion battery electrolyte, and belongs to the technical field of aqueous zinc ion batteries. The technical problems of serious zinc dendrite growth, hydrogen evolution and generation of by-products of the aqueous zinc ion battery are solved. According to the technical scheme, the aqueous zinc ion battery electrolyte containing the amino acid additive comprises zinc salt, water and the amino acid additive, wherein the amino acid additive is L-tryptophan. The electrolyte has the beneficial effects that the interface environment between the electrolyte and a zinc negative electrode can be improved by adding the L-tryptophan into the electrolyte, the water-based zinc ion battery assembled by the prepared electrolyte is long in cycle life and high in coulombic efficiency, and growth of zinc dendrites and precipitation of hydrogen are effectively inhibited.

Rapid development of wearable portable devices urgently requires high performance flexible supercapacitors and batteries. As a core component of a flexible energy storage device, hydrogel electrolyte has aroused wide attention. According to the invention, the PBAx composite hydrogel (x represents the PVA content, and the values are 0, 0.5, 1 and 1.5) is prepared through chain crosslinking of sodium polyacrylate (PANa), polyvinyl alcohol (PVA) and bacterial cellulose (BC). The PVA component can effectively regulate and control intramolecular crosslinking among PANa molecular chains through hydrogen-bond interaction, so that the optimized PBA0.5 hydrogel forms a porous structure, the structure shows remarkably enhanced water holding capacity and mechanical strength, and the ultimate compressive strength reaches 258.4 kPa. By utilizing the ionic conductivity characteristic of 4.607 S m <-1 > of the material, the specific capacity of a basic zinc battery assembled by the material reaches 171.3 mAh g <-1 >, and the material shows excellent rate capability. The hydrogel electrolyte can effectively protect the zinc negative electrode and guarantee the cycling stability of the battery. In addition, due to the excellent anti-freezing performance of the PBA0.5 hydrogel, the specific capacity of the battery in a low-temperature environment of-40 DEG C can still be kept at 83.1 mAh g <-1 >.

The invention discloses an organic composite electrode material, a preparation method thereof and a photo-assisted charging ammonium ion battery. The organic composite electrode material is obtained by compounding 2, 6-di [1-(pyrene-3, 4, 9, 10-tetraformyl diimine)] anthraquinone and reduced graphene oxide, and the organic composite electrode material is prepared by compounding the 2, 6-di [1-(pyrene-3, 4, 9, 10-tetraformyl diimine)] anthraquinone and the reduced graphene oxide. According to the invention, the photo-assisted charging strategy and the aqueous ion battery are combined, the ammonium ions are used as the charge carrier of the aqueous photo-assisted charging battery for the first time by virtue of the rapid dynamic characteristic of the ammonium ions in the aqueous electrolyte, and the advantages of rapid ion transmission of the ammonium ions in the electrolyte are utilized; the problem that the photoelectric reaction rate and the electrochemical oxidation reduction rate in the aqueous photo-assisted rechargeable battery are not matched is solved, collaborative optimization of the photoelectric reaction rate and the electrochemical reaction rate is achieved, the charging and discharging efficiency and the energy utilization rate of the battery are remarkably improved, and a new thought is provided for the next generation of photo-storage integrated battery technology.

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.