317results about How to "Wide electrochemical window" patented technology

The invention relates to organic-inorganic all-solid-state composite electrolyte as well as preparation and application methods thereof, belonging to the field of lithium ion batteries. According to the organic-inorganic all-solid-state composite electrolyte, a highly-ordered three-dimensional connection network skeleton is formed by an inorganic fast lithium ion conductor, and a three-dimensional connection network is filled with a polymer and lithium salt. The organic-inorganic all-solid-state composite electrolyte which is flexible and has a controllable three-dimensional connection network structure is prepared. The electrolyte is high in lithium ion conductivity, wide in electrochemical window, good in mechanical property and stable to lithium metal. A lithium ion secondary battery assembled by a composite electrolyte membrane prepared by the method is high in capacity, stable in cycle performance, low in interface impedance and good in interface stability.

The invention relates to an aluminium ion battery and a preparation method thereof and belongs to the field of aluminium ion batteries and preparation thereof. The aluminium ion battery comprises a positive electrode, a negative electrode and an aluminium ion electrolyte, wherein the positive electrode is made of transition metal oxide; the negative electrode is made of high purity aluminium; the battery comprises a diaphragm material when the aluminium ion electrolyte is in a liquid state. Since abundant aluminium elements are stored, the cost for the ion battery is greatly reduced; the safety performance is improved; the transition metal oxide is applicable to hypervalent ion batteries due to relative stability under the variable valence states and different valence states. The ion liquid serves as the electrolyte for the hypervalent ion battery, so that aluminium ion is high in conductivity, good in heat stability, broad in electrochemical window and high in chemical stability and almost incapable of reacting with the positive electrode materials, the negative electrode materials, a current collector, a binder and a diaphragm in a battery system and capable of maintaining the liquid state in a board temperature range. The aluminium ion battery can be applied to various fields, such as electronic industries, communication industries and electric vehicles and the like.

The invention relates to the technical field of lithium-ion batteries, in particular to electrolyte for a lithium-ion battery made of ternary cathode materials and the lithium-ion battery made of the ternary cathode materials. The electrolyte for the lithium-ion battery comprises a non-aqueous organic solvent, lithium salt and additives, and the additives comprise fluoroethylene carbonate, sulfur-containing organic matters and fluoro-ether. By comparison with the prior art, due to the synergistic effect of the three additives including fluoroethylene carbonate, sulfur-containing organic matters and fluoro-ether, the lithium-ion battery made of the ternary cathode materials has excellent cycle performance and high-temperature storage performance under the high-potential condition of 4.35 V or higher, thus, the lithium-ion battery has a wide application prospect in a ternary battery system.

The invention specifically relates to a composite gel polymer electrolyte and a preparation method and application thereof, belonging to the technical field of lithium ion batteries. The composite gel polymer electrolyte is composed of a composite electrolyte membrane and a liquid electrolyte, wherein the composite electrolyte membrane is composed of two or multiple layers, at least one of the layers is a solid polymer electrolyte capable of transferring lithium ions, and at least another of the layers is a high polymer material different from the solid polymer electrolyte. The composite gel polymer electrolyte provided by the invention has high conductivity, a great lithium ion migration coefficient and good safety performance and can be used for lithium secondary batteries with large capacity, high power and high-energy density.

The invention provides a preparation method of a graphene modified glassy carbon electrode and an application thereof. The preparation method comprises the steps of: (1) preparing an oxidized grapheme dispersion liquid; (2) cleaning up the glassy carbon electrode, dropping the oxidized grapheme dispersion liquid on the surface of the glassy carbon electrode and airing; (3) carrying out electrochemical reduction in a buffer solution by using an oxidized graphene modified glassy carbon electrode as a work electrode to obtain the graphene modified glassy carbon electrode; and detecting the work electrode of an oxidoreduction active pigment as the graphene modified glassy carbon electrode. The graphene modified glassy carbon electrode is prepared by electrochemical reduction of the oxidized graphene modified glassy carbon electrode. The method has the advantages of simpleness in operation, short detection time, sensitive response and good analyzing effect.

The invention discloses a method for preparing binary or ternary fluorine-containing sulfimide alkali metal salts, a method for preparing ionic liquid by the binary or ternary fluorine-containing sulfimide alkali metal salts, and applications of the alkali metal salts and ionic liquid as electrolytes in carbon-based super capacitors, secondary lithium (ion) batteries, and the like. The method for preparing the binary or ternary fluorine-containing sulfimide alkali metal salts provided by the invention is short in operation steps, easy for product separation and purification, and high in product yield and purity; the binary or ternary fluorine-containing sulfimide lithium provided by the invention has good thermal stability and hydrolysis resistance; a nonaqueous electrolytic solution of the binary or ternary fluorine-containing sulfimide lithium has high conductivity and lithium ion transference number, and also exhibits good oxidation resistance and good compatibility with widely-used electrode materials; meanwhile, the ionic liquid containing the binary or ternary fluorine-containing sulfimide anions exhibits the properties of low viscosity and high conductivity, and has a wide electrochemical window.

The invention discloses an anion responsive Pickering emulsion. The emulsion is prepared from ionic liquid modified sheet materials which are taken as a particle emulsifier, have different front and back surface properties and are dispersed on an interface of a water phase and an oil phase; one side of the particle emulsifier is a lipophilic group, and the other side is an ionic liquid functional group. According to the emulsion, the ionic liquid functional group has an anion exchangeable characteristic and can adjust the surface wettability while being endowed with functionalization after the anion exchange, and accordingly, the sheet materials have adjustable emulsifying performance; anion control functionalization and phase inversion are performed according to the characteristic that types of the stabilized emulsion are different due to different physicochemical properties of ionic liquid base materials containing different anions in the specific oil-water proportion, and the emulsion has broader application potentiality.

The invention discloses alkali metal salts of binary or ternary fluorine-containing sulfimide, a method for preparing ionic liquid from the alkali metal salts of binary or ternary fluorine-containing sulfimide, and applications of the alkali metal salts and the ionic liquid as electrolytes in carbon-based supercapacitors, secondary lithium (ion) batteries, and the like. The method for preparing the alkali metal salts of binary or ternary fluorine-containing sulfimide provided by the invention is short in operation steps, and the product is easy to separate and purify, and very high in yield and purity; the binary or ternary fluorine-containing lithium sulfimide provided by the invention is good in thermal stability and hydrolysis resistance; the non-aqueous electrolyte has high conductivity and lithium ion transport number, exhibits good oxidation resistance, and has good compatibility with widely-used electrode materials; meanwhile, the ionic liquid containing binary or ternary fluorine-containing sulfimide anions is characterized by low viscosity and high conductivity, and has a wide electrochemical window.

The invention discloses a lithium single ion conduction polymer electrolyte based on functionalized lithium borate. A double-bond-containing functionalized lithium borate and a sulfydryl-containing compound are subjected to an alkene-sulfydryl click reaction, or the double-bond-containing functionalized lithium borate and the sulfydryl-containing compound and a double-bond-containing polyether are subjected to a poly-alkene-sulfydryl click reaction to prepare a linear or network-shaped all-solid-state or gel catalyst. The lithium single ion conduction polymer electrolyte prepared by the invention has the advantages of simple and easily implemented synthesis, low-cost and easily available raw materials, high room-temperature conductivity, high lithium ion mobility, wide electrochemical window, and the like; and a lithium battery assembled by the electrolyte provided by the invention has high safety, high rate capability, long cycle life and stability.

The invention relates to a flame retardant sodium-ion battery electrolytic solution and application thereof. The electrolytic solution comprises the following ingredients with the concentration: 0.001-2mol/L sodium salt, carbonate esters and/or ether organic solvents, 0.1-50% of a flame retardant additive and 0-0.5mol/L other functional additives. The flame retardant sodium-ion battery electrolytic solution is applied into a sodium primary battery, a sodium secondary battery and a sodium ion battery. A sulfuryl fluoride base group-containing compound has good flame retardance, has little influence on the electrochemical performance and can be used as a novel electrolytic solution flame retardant additive; the flame retardant additive is added into the electrolytic solution, so that the combustibility of the electrolytic solution can be reduced. A phosphonitrile base group-containing compound has good flame retardance, has little influence on the electrochemical performance, and can be used as a novel electrolytic solution flame retardant additive; the flame retardant additive is added into the electrolytic solution, so that the combustibility of the electrolytic solution can be reduced. After the electrolytic solution is applied to the sodium battery, the combustion possibility of the electrolytic solution is zero.

The invention discloses a polymer solid electrolyte membrane and preparation method thereof. The polymer solid electrolyte membrane comprises a polymer matrix and a composite ionic liquid, and the composite ionic liquid comprises lithium salt and N-containing heterocyclic compound. According to the invention, by introducing the ionic liquid into the polymer solid electrolyte membrane, the both advantages of the ionic liquid and the the polymer solid electrolyte membrane are achieved, and the self-supporting electrolyte with independent from water, high conductivity, good security, good ionic conductivity and high mechanical property is obtained. The invention can be widely used in the fields of lithium ion battery, and has a good application prospect in the fields of electronics, medical treatment, space technology, electrochrimic technique, photoelectricity, sensors and the like.

The invention provides a lithium-rich antiperovskite oxide composite electrolyte. The materials of the lithium-rich antiperovskite oxide composite electrolyte comprise a polymer, a lithium salt and afiller, and the filler is lithium-rich antiperovskite oxide; the structural formula of the lithium-rich antiperovskite oxide is Li3-xHxOA1-yBy, wherein A and B are halogen elements, x is not more than1 and not less than 0, and y is not more than 1 and not less than 0. By using the lithium-rich antiperovskite oxide electrolyte as the filler, the ionic conductivity and electrochemical window of thecomposite polymer electrolyte can be improved, the mechanical property of the composite electrolyte can be increased, the interface impedance between the electrolyte and the lithium-based negative pole can be reduced, and thus the acquired composite electrolyte has the relatively high lithium ion conductivity, good bending mechanical property, and relatively high interface stability.

The invention provides electrolyte solution, which contains an organic solvent, a lithium salt or lithium oxide, a compound containing an electron-withdrawing group and an additive, wherein the solvent is a carbonic ester and/or ether solvent; and the additive is a compound having a molecular formula of RBC2O4Li, R in the formula may be -C2O4, -F2, -C6H2O2, alkyl or fluorine-containing substitutedalkyl, and the concentration of the additive in the electrolyte solution is 0.005 to 0.1mol/l. The invention also provides a preparation method of the electrolyte solution. The invention also provides a lithium cell, which comprises a lithium cell diaphragm soaked in the electrolyte solution. The electrolyte solution of the invention has the advantages of high transport number of lithium ions, high conductivity and wide electrochemical window. Meanwhile, the electrolyte solution has high compatibility with a carbon cathode material.

The invention relates to a solid polymer electrolyte , in particular to a solid electrolyte containing a polymer with a main chain containing sulfur, a solid secondary lithium battery formed by the solid electrolyte as well as a preparation method and application of the solid electrolyte. The solid electrolyte comprises the polymer with the main chain containing sulfur, lithium salt and a porous supporting material; the thickness of the solid electrolyte is 20-800 microns, the mechanical strength of the solid electrolyte is 10-80MPa, the room-temperature ionic conductivity of the solid electrolyte is 5*10<-5>-7*10<-4>S/cm, and the electrochemical window of the solid electrolyte is 4.5-7V. The polymer solid electrolyte provided by the invention is liable to prepare, simple to form and goodin mechanical performance, has higher ionic conductivity and wider electrochemical window at the same time, can effectively inhibit growth of cathode lithium dendrites and can improve the interface stability and the long cycle performance of the battery.

The invention discloses a sulfide solid electrolyte material with high stability to lithium, a preparation method thereof. A chemical composition is 7Li2S. XP2S5. YMmOn, x is greater than 0, y is greater than 0, m is greater than 0, n is greater than 0, and M is a metal element. The preparation method comprises the following steps: mixing and ball-milling Li2S, P2S5 and MmOn to obtain an initial solid electrolyte material; and putting the obtained initial solid electrolyte material into a quartz test tube, sealing, carrying out heat treatment, and grinding into powder in an inert gas atmosphere to obtain the sulfide solid electrolyte material with high stability to lithium. The electrolyte also has the advantages of high air stability, good stability to lithium metal, wide electrochemicalwindow and the like, and the all-solid-state lithium battery assembled by the solid electrolyte material has the characteristics of high charge-discharge specific capacity, high safety, excellent cycle stability and the like.

The invention provides a dual-ion battery, and relates to the technical field of electrochemical energy storage. The dual-ion battery comprises a positive electrode, a negative electrode, a separator and an electrolyte solution, wherein the separator is arranged between the positive electrode and the negative electrode, the positive electrode comprises a graphite positive electrode material, a negative electrode material is a MnO or metal Sn foil, and the electrolyte solution comprises an electrolyte, an organic solvent and an electrolyte additive. The graphite material is selected as the positive electrode material of the battery, the MnO or Sn foil which has activity on lithium ions is selected as the negative electrode material, and the dual-ion battery obtained by assembly is low in raw material cost, is green and environmental-friendly and has favorable rate performance and coulombic efficiency; a positive electrode platform is high in level, the dendritic crystal on a surface of the negative electrode during the repeated charge-discharge process of the battery is prevented, and the safety of the battery is greatly improved; and moreover, the electrolyte additive is added into the electrolyte solution of the dual-ion battery, the stability of the battery can be effectively improved, and the rate performance of the battery is improved.

The invention relates to gallium and molybdenum co-doped garnet type lithium ion solid electrolyte and a preparation method thereof. A constituent general formula of the gallium and molybdenum co-doped garnet type lithium ion solid electrolyte is Li6.55-2xGa0.15La3Zr2-xMoxO12, wherein x is greater than or equal to 0.05, and smaller than or equal to 0.25. The gallium and molybdenum co-doped garnettype lithium ion solid electrolyte has relatively high lithium ion conductivity, and greatly reduces the cost. The preparation method for the gallium and molybdenum co-doped garnet type lithium ion solid electrolyte is simple in process, and is low in cost; and compaction of the prepared gallium and molybdenum co-doped garnet type lithium ion solid electrolyte is greatly improved.

The invention relates to preparation of a garnet type solid electrolyte material, and a buffer layer design and the solid electrolyte of the type are applied to a solid-state lithium ion secondary battery. The preparation in the invention can be applied to all-solid-state lithium ion batteries, lithium-sulfur batteries and the like and has the functions of electrolyte and diaphragms. The solid electrolyte of the type has the characteristics of high ionic conductivity, stability, chemical stability, wide electrochemical window and the like, the preparation process of the lithium ion battery canbe simplified, the cost can be reduced, and the safety of the battery can be remarkably improved.

The invention discloses composite lithium ion battery electrolyte and a lithium ion battery comprising the same. The composite lithium ion battery electrolyte comprises an organic solvent, lithium salt and an additive. The organic solvent is at least two of propylene carbonate (PC), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), allyl ethyl carbonate (AEC), allylmethyl carbonate (AMC) and the like; and the additive is selected from at least two of unsaturated carbonate, sulfur-containing organic matters, lithium borate dioxalate, lithium difluorophosphate and fluoro-imide salt. For the respective physical and chemical characteristics of the organic solvent and the additive, the types of the additive are screened and combined, by adjustment on an electrolyte additive, the ratio by which respective advantages can be played and respective shortcomings can also be suppressed is found out, the high-voltage capacity of the battery is improved, and the cycle life of the battery is prolonged.