5177results about "Electrolytes" patented technology

A battery (100) according to an embodiment includes a power storage element (10) which includes a positive electrode (11), a negative electrode (13), and a solid electrolyte layer (15) which is disposed between the positive electrode (11) and the negative electrode (13) and an exterior body (20) which covers the power storage element (10). At least one of the positive electrode (11), the negative electrode (13), and the solid electrolyte layer (15) contains a solid electrolyte represented by Li3+a-cE1-bGbDcXd-c ⋅⋅⋅ (1) and an internal pressure in an accommodation space (K) enclosed by the exterior body (20) is less than 101.3 kPa.

The invention relates to the technical field of sodium ion batteries, in particular to a sodium ion electrolyte, a preparation method thereof and a battery. The sodium ion electrolyte comprises an ester solvent, salts and an additive, wherein the ester solvent comprises chain carboxylic ester, chain carbonic ester and cyclic carbonic ester, and the salt comprises sodium salt. The sodium ion electrolyte provided by the invention has high low-temperature conductivity, not only can improve the low-temperature discharge capacity, but also can improve the low-temperature charging capacity, and can widen the charging window of a conventional commercial sodium battery from 0 DEG C to-30 DEG C.

Provided in the present application are a lithium secondary battery and an electric device. The lithium secondary battery comprises an electrolyte and a negative electrode sheet, wherein the electrolyte comprises a chain carboxylic ester and a cyclic carbonate, and the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one side of the negative electrode current collector. Based on the total mass of the electrolyte, the mass content W1 of the chain carboxylic ester and the mass content W2 of the cyclic carbonate satisfy: 0.1≤W2 / W1≤2, and the mass content W1 of the chain carboxylic ester and the thickness H of the negative electrode film layer satisfy: 0.2≤H / 100W1≤20, with the unit of H being μm. The lithium secondary battery has good fast charging performance and cycling performance.

A protective structure for use with metallic lithium (or other alkali or alkali earth metals) and its method of manufacture are provided. The protective structure may include a substantially continuous and substantially nonporous buffer layer disposed on the metallic lithium layer which is conductive to lithium ions. A substantially continuous and substantially nonporous protective layer may be disposed on the buffer layer.

A solid electrolyte material includes a solid electrolyte and an oxide material. The solid electrolyte includes Li, M, O, and X. M is at least one selected from the group consisting of Nb, Ta, and Zr. X is at least one selected from the group consisting of F, Cl, Br, and I. The oxide material includes at least one selected from the group consisting of oxides of divalent metal elements and oxides of trivalent metal elements. The mass proportion of the oxide material to the solid electrolyte is 1% or more and 50% or less. A battery includes a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, and at least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer contains the above solid electrolyte material.

A solid electrolyte includes: LiaAbEc(SO4)dJeXfHh, A is selected from alkaline earth metals and alkali metals other than Li, E is selected from Al, Ga, In, Sc, Y, Ti, Zr, Hf, and lanthanides, J is selected from OH, BO2, BO3, BO4, B3O6, B4O7, CO3, NO3, AlO2, SiO3, SiO4, Si2O7, Si3O9, Si4O11, Si6O18, PO3, PO4, P2O7, P3O10, SO3, SO5, S2O3, S2O4, S2O5, S2O6, S2O7, S2O8, BF4, PF6, BOB, (COO)2, N, AlCl4, CF3SO3, CH3COO, CF3COO, OOC—(CH2)2—COO, OOC—CH2—COO, OOC—CH(OH)—CH(OH)—COO, OOC—CH(OH)—CH2—COO, C6H5SO3, OOC—CH═CH—COO, OOC—CH═CH—COO, C(OH)(CH2COOH)2COO, AsO4, BiO4, CrO4, MnO4, PtF6, PtCl6, PtBr6, PtI6, SbO4, SeO4, TeO4, HCOO, and O, X is selected from F, Cl, Br, and I, 0.5≤a<6, 0≤b<6,0<c<2,0.1<d≤6.0, 0<e≤6.0, 0<f≤6.1, and 0≤h≤0.2, and a peak is observed at a diffraction angle 2θ=22.3°±1.0° in an X-ray diffraction pattern in which Cu-Kα is used as a line source.

The invention provides a secondary battery and a preparation method and device thereof, and the secondary battery comprises a positive pole piece, a negative pole piece, a solid electrolyte, a first modification layer and a second modification layer. One of the first modification layer and the second modification layer is located between the positive pole piece and the solid electrolyte, and the other one of the first modification layer and the second modification layer is located between the negative pole piece and the solid electrolyte; the first modification layer and / or the second modification layer comprises 20 wt%-60 wt% of polymer, 10 wt%-65 wt% of lithium salt and 2 wt%-45 wt% of inorganic particles. The thickness of the first modification layer and / or the second modification layer is relatively thin, easy to control and relatively good in uniformity, so that the interface resistance between the positive pole piece and / or the negative pole piece in the secondary battery and the solid electrolyte is remarkably reduced, the side reaction between the solid electrolyte and the positive pole piece and / or the negative pole piece is avoided, and the service life of the secondary battery is prolonged. And the first modification layer and / or the second modification layer have / has good thermal stability, so that the cycle performance of the secondary battery can be improved.

The embodiment of the invention relates to the technical field of batteries, and provides a preparation method of a lithium ion battery, which comprises the following steps: winding or laminating a positive plate, a negative plate and a diaphragm, and putting into a shell to form an initial battery cell; in the step of the first liquid injection process, a first electrolyte is injected into the initial battery cell, and the first electrolyte comprises the following components: 0.5 wt%-2wt% of vinylene carbonate, 5wt%-15wt% of lithium salt and a non-aqueous organic solvent; performing a formation process on the initial battery cell; in the step of the second liquid injection process, a second electrolyte is injected into the initial battery cell, and the second electrolyte comprises the following components: 5wt%-20wt% of vinylene carbonate, 5wt%-15wt% of lithium salt, 0.005 wt%-30wt% of an infiltration stabilizer and a non-aqueous organic solvent; wherein the first electrolyte or the second electrolyte further comprises at least one of 1, 3-propane sultone or fluoroethylene carbonate, so that the lithium ion battery is at least favorably kept to have high energy efficiency and long cycle life under the condition of low liquid injection amount.

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

The invention relates to the technical field of batteries, in particular to a battery. Comprising a positive plate and electrolyte, the positive plate comprises a positive current collector and a coating positioned on the surface edge of at least one side of the positive current collector along the length direction; the coating comprises filling particles, and the filling particles comprise at least one of inorganic particles and nitrogen-containing particles; the electrolyte comprises non-fluorinated cyclic carbonate and fluorinated ethyl acetate; the non-fluorinated cyclic carbonate comprises propylene carbonate and optional ethylene carbonate; on the basis of the total mass of the electrolyte, the content ratio C1 of the non-fluorinated cyclic carbonate is smaller than or equal to 25%, the content ratio C11 of the propylene carbonate is 3.1%-24.9%, the content ratio C12 of the ethylene carbonate is 0%-5%, and the content ratio C2 of the fluorinated ethyl acetate is 20.2%-70%. The battery provided by the invention can improve the problem of lithium precipitation under low-temperature discharge, and has relatively good short-circuit safety performance and relatively low high-temperature gas production rate.

The disclosed subject matter relates to lithium ion conductors and batteries (such as pseudo solid state and all solid state batteries), and methods of making and use thereof. Disclosed herein are lithium ion conductors comprising Li1+xNb1−xZrxOX4, wherein X is a halide; and 0≤x≤1. Also disclosed herein are methods of making and use of any of the lithium ion conductors (e.g., Formula I) disclosed herein. Also disclosed herein are devices comprising any of the lithium ion conductors disclosed herein (e.g., Formula I), such as a solid state battery.

The invention relates to a bismuth-containing modified electrolyte, an all-vanadium redox flow battery and a preparation method and application of the all-vanadium redox flow battery, and belongs to the technical field of all-vanadium redox flow batteries. The bismuth-containing modified electrolyte comprises a vanadium electrolyte, bismuth salt is added into the vanadium electrolyte to serve as a catalyst, and a hydroxyl carboxylic acid complexing agent is added; the molar ratio of the bismuth salt to the hydroxycarboxylic acid complexing agent is (6-8): (0.6-0.8). According to the invention, the catalyst and the complexing agent are added into the electrolyte, the Bi elementary substance is deposited on the electrode through the charging process of the battery, the active sites of the electrode are increased, and the energy efficiency of the battery is improved. Meanwhile, the catalyst can improve the capacity retention ratio of the flow battery, greatly simplify the process steps and reduce the cost.

The invention belongs to the technical field of design and preparation of solid electrolyte materials, and particularly relates to a LiBH4-based composite solid electrolyte material and a preparation method thereof.The LiBH4-based composite solid electrolyte material is obtained by performing high-energy ball milling on a mixture of LiBH4 and one or two metal halides MX2 in a certain molar ratio in an argon atmosphere; m is Mg, Zn, Ni or Bi; x is F, Cl, Br or I. According to the LiBH4 composite solid electrolyte prepared by the preparation method disclosed by the invention, the ionic conductivity at room temperature is improved to 10 <-4 > S cm <-1 > or above, and the ion diffusion activation energy is only 0.16 eV; the process is simple, the preparation time is short, the repeatability is high, no pollution is caused to the environment, and the industrial production requirement is met, so that the all-solid-state lithium ion battery electrolyte is expected to realize commercialized application.

The present disclosure relates to lithium-ion energy storage systems, methods of manufacturing a lithium-ion battery, and lithium-ion batteries having an Ni-rich cathode, an anode, an electrolyte, and a separator. Preferably, the electrolyte is located between the anode and the cathode, and includes a fluorinated solvent, an additive, and a lithium salt.

A secondary battery and an electric device comprising same. The secondary battery comprises a negative electrode sheet, wherein the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer arranged on at least one surface of the negative electrode current collector, with the negative electrode film layer comprising an additive that can undergo a nucleophilic reaction with a cyclic carbonate compound. The secondary battery has high storage performance.

An aspect of the present invention is a nonaqueous electrolyte energy storage device including: a positive electrode having a positive composite layer including a positive active material; a negative electrode having a negative composite layer including a negative active material; and a nonaqueous electrolyte including a nonaqueous solvent, in which the positive active material includes a lithium-transition metal composite oxide that contains nickel as a transition metal and has a layered α-NaFeO2-type crystal structure, a ratio (N / P) between mass (N) per unit area of the negative active material and mass (P) per unit area of the positive active material is 0.30 or more and 0.45 or less, the nonaqueous solvent contains PC, DEC, and EMC, a content of the PC in the nonaqueous solvent is 25% by volume or more and 55% by volume or less, a total content of the DEC and the EMC in the nonaqueous solvent is 45% by volume or more and 75% by volume or less, and a content of the DEC is equal to or higher than the content of the EMC.

The invention relates to the technical field of batteries, in particular to silicon carbon particles, a negative plate and a battery. The invention provides a silicon-carbon particle. The surface of the silicon-carbon particle is provided with a concave part; the number N of the concave parts on the surfaces of the silicon carbon particles is greater than or equal to 1; the diameter of the concave part is 0.05 [mu] m-5 [mu] m; the depth of the recessed part is 10 nm to 5 [mu] m. The sunken parts are arranged on the surfaces of the silicon-carbon particles, so that the cycle stability and the expansion performance of the silicon-based negative electrode material are improved.

The invention discloses a preparation method and application of a single ion conductor composite binder. The binding agent is prepared by carrying out compound modification on a copolymer of butyl acrylate and 2-acrylamido-2-lithium methylpropanesulfonate and polyisobutene. The binder is mainly characterized in that firstly, the binder can be completely dissolved in a toluene non-polar solvent, and the problem that a traditional binder is incompatible with sulfide electrolyte is solved; and secondly, due to the unique molecular structure design, the adhesive has excellent adhesive property and ionic conductivity, and the interface impedance can be remarkably reduced. A butyl acrylate flexible chain segment provides elastic support, and a sulfonate group of 2-acrylamido-2-lithium methylpropanesulfonate and the surfaces of sulfide particles form strong chemical bonding, so that the binding force with electrolyte is enhanced. The binder is simple in preparation process, controllable in cost and suitable for large-scale production, and an important material solution is provided for promoting industrialization of sulfide all-solid-state batteries.

The invention provides a secondary battery and an electric device. The secondary battery comprises a battery shell with a containing cavity, a battery core assembly located in the containing cavity and an electrolyte containing a first additive, wherein the first additive comprises a sulfate compound; wherein, based on the total mass of the electrolyte, the ratio W / R of the mass content W of the sulfate compound to the residual space R is in the range of 0.03%-40%, so that the obtained secondary battery has both the service life and the energy density.

The invention relates to the technical field of new energy battery materials, in particular to a surface-coated sulfide solid electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing and stirring a sulfide solid electrolyte and a first solvent to obtain a first mixed solution; mixing and stirring nanoparticles with oxygen-containing functional groups and a second solvent to obtain a second mixed solution; adding the second mixed solution into the first mixed solution, and stirring to obtain a third mixed solution; and carrying out vacuum drying on the third mixed solution to obtain the surface-coated sulfide solid electrolyte. The sulfide solid electrolyte is subjected to surface particle coating through simple mixing and vacuum drying, oxygen-containing functional groups are attached to the surfaces of the particles, so that the material is more oxygen-loving, the air stability of the sulfide solid electrolyte is improved, and the material still keeps high ionic conductivity and has good electrochemical performance. And moreover, the machining process is reduced, the machining cost is reduced, and the practical application value is higher.

This solid electrolyte (10) contains LiaAbEc (SO4) dJeXfHh... (1), in formula (1), A is at least one element selected from the group consisting of alkali metals other than Li and alkaline earth metals, E is at least one element selected from the group consisting of Al, Ga, In, Sc, Y, Ti, Zr, Hf and lanthanide elements, and J is selected from the group consisting of OH, BO2, BO3, BO4, B3O6, B4O7, CO3, NO3, AlO2, SiO3, SiO4, Si2O7, Si3O9, Si4O11, Si6O18, PO3, PO4, P2O7, P3O10, SO3, SO5, S2O3, S2O4, S2O5, S2O6, S2O7, S2O8, BF4, 0.5 < = a < 6, 0 < = b < 6, 0 < c < 2, 0.1 < d < = 6.0, 0 < e < = 6.0, 0 < f < = 6.1, and 0 < = h < = 0.2 are satisfied, and a peak is confirmed at a diffraction angle 2 [theta] = 22.3 DEG + / -1.0 DEG in an X-ray diffraction pattern using Cu-K [alpha] as a radiation source.

Embodiments described herein relate to electrochemical cells with multiple separators, and methods of producing the same. A method of producing an electrochemical cell can include disposing an anode material onto an anode current collector, disposing a first separator on the anode material, disposing a cathode material onto a cathode current collector, disposing a second separator onto the cathode material, and disposing the first separator on the second separator to form the electrochemical cell. The anode material and / or the cathode material can be a semi-solid electrode material including an active material, a conductive material, and a volume of liquid electrolyte. In some embodiments, less than about 10% by volume of the liquid electrolyte evaporates during the forming of the electrochemical cell. In some embodiments, the method can further include wetting the first separator and / or the second separator with an electrolyte solution prior to coupling the first separator to the second separator.

A secondary battery and an electric device. In the secondary battery, solvents with a high viscosity and a low viscosity are combined, specific types of electrolyte additives are compounded and build a parameter relationship together with the resistivity of a negative electrode film, and therefore the overall electrolyte injection amount is increased without affecting the electron conduction of a negative electrode, thereby improving the infiltration effect of an electrolyte; moreover, since unique electrolyte components are selected, the degree of interfacial side reactions of the electrolyte is low during operation of the secondary battery, the probability of gas production is low at a normal temperature or high temperature, and the ion conduction capability is high. The secondary battery has good dynamic performance, low risks of high-temperature gas production and a DCR increase, and ideal fast-charge application performance.

Embodiments described herein relate to electrochemical cells with multiple separators, and methods of producing the same. A method of producing an electrochemical cell can include disposing an anode material onto an anode current collector, disposing a first separator on the anode material, disposing a cathode material onto a cathode current collector, disposing a second separator onto the cathode material, and disposing the first separator on the second separator to form the electrochemical cell. The anode material and / or the cathode material can be a semi-solid electrode material including an active material, a conductive material, and a volume of liquid electrolyte. In some embodiments, less than about 10% by volume of the liquid electrolyte evaporates during the forming of the electrochemical cell. In some embodiments, the method can further include wetting the first separator and / or the second separator with an electrolyte solution prior to coupling the first separator to the second separator.

The invention discloses a high-stability iron-cerium flow battery and a preparation method of electrolyte, and belongs to the technical field of flow batteries. A positive electrolyte and a negative electrolyte are cerium salt and ferric salt, and are respectively mixed with nitrilotriacetic acid, ethylenediamine tetraacetic acid, trans-1, 2-cyclohexanediamine tetraacetic acid, 1, 3-propane diamine tetraacetic acid, N-(2-ethoxyl) ethylenediamine-N, N ', N'-triacetic acid, iminodiacetic acid, iminodisuccinic acid, succinic acid, N, N '-bis (2-hydroxyethyl)-N, N', N '-triacetic acid and N, N'-bis (2-hydroxyethyl)-N, N '-bis (2-hydroxyethyl)-N, N'-bis (2-hydroxyethyl)- N, N '-ethylenediamine disuccinic acid, aspartic acid or a derivative chemical thereof are coordinated to form an aqueous solution of the coordination compound. The positive electrolyte and the negative electrolyte are prepared from the same and equal chelating agent and supporting electrolyte, and the matching degree of the acid-base property of the positive electrolyte and the negative electrolyte is maintained; the auxiliary electrolyte is added, so that the viscosity difference between the positive electrolyte and the negative electrolyte is reduced, the transmembrane migration of water is reduced, and the conductivity is improved. The selected chelating agent is stably combined with iron and cerium, transmembrane transportation of active substances is inhibited, ion cross contamination among different electrolytes is reduced, and meanwhile side reactions are reduced. The price is low, and the charge-discharge performance and the cycle life of the iron-cerium flow battery are effectively improved at relatively low cost.

Disclosed herein is the compound NaxLi3-xYCl6 (0<x<3), which is usable as an effective solid-state battery electrolyte. The disclosed compound can have a trigonal ordered crystal structure. The disclosed compound can exhibit characteristics beneficial for solid-state battery electrolyte applications.

The objective of the present invention is to provide a micron-sized porous sodium ferrous sulfate / carbon composite positive electrode material and a sodium-ion battery or sodium battery produced therefrom. SOLUTION: The composite material of the present invention includes a sodium ferrous sulfate / carbon composite material with and / or without metal doping elements, which is prepared by coprecipitation and solid-state calcination, and the particle size is 2-30 nm, has a porous structure, and is composed of densely packed 80-200 nm primary particles densely covered with amorphous carbon, and the surface of the micron particles is covered with a thin layer of reduced graphene to form a three-dimensional conductive network. The micron-sized particle positive electrode material has a high tap density, which is helpful in increasing the volumetric energy density of the battery, and the material has the advantages of abundant raw material reserves, low cost, high operating voltage, good rate characteristics and cycle stability as the positive electrode of sodium ion batteries or sodium batteries, and the preparation process of the material is simple. The sodium ion batteries or sodium batteries of the present invention have the advantage of high energy density and have the prospect of broad market application.

The invention discloses a modified lithium borohydride solid electrolyte and a preparation method thereof, and belongs to the field of all-solid-state battery electrolyte preparation, the method comprises the following steps: mixing LiBH4 and lithium halide according to a formula ratio, and carrying out ball milling and heating to obtain an xLiBH4-LiX (x = 1-5) solid solution; then mixing and ball-milling B2O3 and the LiBH4-lithium halide solid solution to obtain a doped and composite synergistically modified (xLiBH4-LiX) y-B2O3 (y is equal to 10 to 20) solid electrolyte; a LiBH4 phase is stabilized by doping lithium halide, and grain gaps are densified by compounding B2O3, so that the grain boundary impedance is reduced, the lithium dendrite inhibition capability of the lithium borohydride-based solid electrolyte is improved, the stable operation of the lithium borohydride-based solid electrolyte at high voltage is ensured, and the lithium borohydride-based solid electrolyte has relatively high ionic conductivity, relatively low electronic conductivity and a relatively wide electrochemical window; and the lithium borohydride-based solid electrolyte has good stability and compatibility with a lithium metal negative electrode, and development of the lithium borohydride-based solid electrolyte in commercial application of a lithium ion battery is facilitated.

An electrolyte for a rechargeable lithium battery, according to embodiments of the present disclosure, comprises: a lithium salt; an organic solvent; and a fluorine-based additive of a specific chemical formula. The rechargeable lithium battery comprises: an electrode assembly which comprises a positive electrode comprising a lithium-transition metal oxide having a lithium molar ratio of 1.1 or more, and a negative electrode facing the positive electrode; and an electrolyte which is impregnated in the electrode assembly and comprises a fluorine-based additive of a specific chemical formula. Through the fluorine-based additive, electrolyte side reactions can be prevented, and the high-voltage charging stability and high-temperature lifespan characteristics of a positive electrode active material can be improved.

In an embodiment, an electrolyte for a lithium-ion battery includes a lithium salt, a phosphorus-containing additive, and a solvent. In an embodiment, a lithium-ion battery comprises an anode, a cathode, an electrolyte and a separator. The anode comprises an anode active layer. The cathode comprises a cathode active layer, where the cathode active layer comprises lithium and manganese-rich layered-structure material. The electrolyte comprises a phosphorus-containing additive. The separator is disposed between the anode and the cathode.