63 results about "Inorganic electrolyte" patented technology

The invention discloses a polycrystalline positive electrode material for a sulfide all-solid-state battery, a preparation method of the polycrystalline positive electrode material and a secondary battery, the surface of a high-nickel polycrystalline positive electrode material is coated with a conductive polymer in a surface coating manner, and an inorganic electrolyte is dispersed in the conductive polymer. According to the polycrystal positive electrode material for the sulfide all-solid-state battery, the stress generated by expansion of the high-nickel polycrystal positive electrode material is effectively relieved by utilizing the elasticity of the conductive polymer, the mechanical strength and durability of the material are enhanced, and the problem that the high-nickel polycrystal positive electrode material is easy to crack in the circulating process is effectively solved. In addition, the interfacial compatibility between the high-nickel polycrystalline positive electrode material subjected to coating modification treatment and the electrolyte is improved, the coated conductive polymer also has excellent electronic conductivity, the inorganic electrolyte can realize lithium ion transmission on a polymer chain segment, and the combined action of the two can improve the internal grain boundary conductivity of the polycrystal, so that the rate performance is improved.

An electrolyte for a secondary battery according to an embodiment of the present invention may include a lithium salt, a composite film including an inorganic electrolyte, and a flame-retardant polymer. A secondary battery according to an embodiment of the present invention may comprise: a positive electrode; the negative electrode is arranged opposite to the positive electrode; and an electrolyte layer that is provided between the positive electrode and the negative electrode and contains an electrolyte for the secondary battery.

The invention discloses a modified composite solid electrolyte as well as a preparation method and application thereof, the modified composite solid electrolyte comprises a polyethylene oxide matrix and an inorganic electrolyte dispersed in the matrix, the inorganic electrolyte is selected from garnet type Li6. 4La3Zr1. 4Ta0. 6O12 (LLZTO) nanoparticles, and the inorganic electrolyte is selected from the group consisting of Li6. 4La3Zr1. 4Ta0. 6O12 (LLZTO) nanoparticles. And an amphiphilic block copolymer is also arranged between the inorganic electrolyte and the matrix. The amphiphilic block copolymer poly (polyethylene glycol acrylate)-co-(1-(2-acryloylethyl)-3-methylimidazolium bis (trifluoromethylsulfonyl) imide) is utilized to improve the compatibility of an inorganic phase-organic phase interface, inhibit agglomeration of LLZTO nanoparticles and promote uniform distribution of the LLZTO nanoparticles in a PEO matrix; and meanwhile, as an ion transmission bridge of lithium ions between the polymer and the LLZTO, multi-channel transmission of the lithium ions is realized.

The invention relates to the technical field of power electronic components, and discloses a fast charge-discharge aluminum electrolytic capacitor and a preparation method thereof. The fast charge and discharge aluminum electrolytic capacitor comprises a high-purity aluminum foil subjected to aluminum chloride-hydrochloric acid etching and oxalic acid-tartaric acid oxidation treatment, a porous electrolyte layer with the thickness of 0.015-0.020 mm, a composite organic-inorganic electrolyte and an aluminum shell packaging structure, the preparation method comprises the steps of aluminum foil processing, electrolyte cutting, winding and assembling, vacuum infusion under-0.09 to-0.095 MPa, staged aging charging under the condition of 70-90 DEG C, and finally packaging and forming. According to the method, a compact oxidation film is formed through anodic oxidation, the proportion of gamma-butyrolactone in the electrolyte is optimized, the staged voltage aging and vacuum infusion process is implemented, and the fast charging performance, high-temperature stability and overall reliability of the aluminum electrolytic capacitor are synergistically improved from the material level and the process level.

The invention discloses lithiated cross-linked synanthrin, a preparation method thereof and application of the lithiated cross-linked synanthrin in an organic / inorganic composite solid electrolyte, and relates to the technical field of polymers and solid electrolytes. The lithiated cross-linked synanthrin provided by the invention is prepared by taking sodium hexametaphosphate and the like as a cross-linking agent to cross-link synanthrin and then adding lithium salt to lithiate the cross-linked synanthrin in an ion exchange manner, so that the stability of an organic / inorganic interface in an organic / inorganic composite solid electrolyte can be improved; the composite strength of the organic electrolyte and the inorganic electrolyte is improved, and meanwhile, the three-dimensional cross-linked structure can introduce an additional lithium ion transmission channel into an electrolyte matrix. Based on this, the composite electrolyte prepared by the invention can have significantly improved ionic conductivity and a wider electrochemical window.

The invention provides a composite solid electrolyte and a preparation method and application thereof. The composite solid electrolyte is composed of a nitrile polymer solid electrolyte, a sodium salt, a plasticizer, an inorganic electrolyte and an interface coupling agent, wherein the interface coupling agent accounts for 0.5-2% of the total mass of the composite solid electrolyte. The preparation method comprises the following steps: sequentially dissolving and dispersing the components in an inert atmosphere, and finally preparing the high-performance interface modified composite solid electrolyte by combining ultrasonic treatment and vacuum drying technologies. The modified composite solid electrolyte effectively enhances the interfacial compatibility between the organic polymer component and the inorganic component, and overcomes the problem of poor interface bonding between the organic polymer component and the inorganic component. The preparation process is simple and easy to control, and the ionic conductivity of the prepared composite solid electrolyte is remarkably improved. The composite solid electrolyte is applied to an all-solid-state sodium battery, the cycling stability and the rate capability of the battery are greatly improved, and the composite solid electrolyte shows good application prospects and market potential.

Disclosed in the present application are a composite porous membrane, a preparation method therefor, a battery and an electrical device. The composite porous membrane comprises an organic polymer substrate and an inorganic electrolyte, the inorganic electrolyte being dispersed in the organic polymer substrate. A plurality of holes of different diameters are formed in the composite porous membrane, the ionic conductivity of the composite porous membrane being 1*10-4 S / cm-5*10-4 S / cm. Thus, the organic polymer substrate, the inorganic electrolyte and the holes in the composite porous membrane can all transport active metal ions, which increases transport paths of the active metal ions, thereby increasing the transport rate of the active metal ions and accordingly improving the power performance of batteries.

An electrolyte for a lithium secondary battery according to an embodiment of the present disclosure may include a lithium salt, a composite film including an organic polymer and an inorganic electrolyte, and a flame retardant compound including a phosphorus-containing functional group. The weight ratio of the flame retardant compound to the composite film may be 0.004 to 0.3. As a result, the flame retardancy and electrical characteristics of the secondary battery can be improved.

The invention belongs to the technical field of batteries, and relates to a porous silicon negative electrode, a preparation method thereof and a solid-state battery. The porous silicon negative electrode comprises a porous silicon negative electrode active material, an inorganic solid electrolyte, a conductive agent and a binder, the porous silicon negative electrode active material comprises a porous silicon skeleton formed by in-situ growth of carbon nanotubes, and organic and inorganic electrolytes distributed inside and outside pores of the porous silicon skeleton; the organic-inorganic electrolyte comprises an organic polymer solid electrolyte, an inorganic solid electrolyte and a lithium salt. The invention also discloses a solid-state battery adopting the porous silicon negative electrode, the solid-state battery provided by the invention has better cycle performance and rate capability, and the expansion rate of a negative electrode plate is obviously reduced.

The invention relates to the technical field of solid-state batteries, and discloses a preparation method of an organic-inorganic composite solid-state electrolyte membrane, which comprises the following steps: step 1, preparing nano cellulose and an inorganic fast ion conductor into a mixed solution A, and preparing the mixed solution A into an inorganic electrolyte membrane by adopting a papermaking process; and 2, preparing a polymeric monomer, a lithium salt and an initiator into a mixed solution B, infiltrating the inorganic electrolyte membrane with the mixed solution B, and carrying out a polymerization reaction on the inorganic electrolyte membrane to prepare the organic-inorganic composite solid electrolyte membrane. The method has the advantages that: 1) uniform distribution of an inorganic phase is realized through a papermaking process, and the ionic conductivity (at room temperature: 1 * 10 <-6 >-8 * 10 <-4 > S / cm) is improved; 2) pores are filled through in-situ polymerization of an organic phase, and interfacial compatibility and mechanical strength are enhanced; and 3) the process is simple, low in cost and suitable for large-scale production. The electrolyte membrane can be applied to a solid-state battery with high energy density and high safety.

The invention discloses a flexible solid-state electrolyte membrane and a preparation method thereof, belongs to the technical field of solid-state batteries, and particularly relates to the preparation method of the flexible solid-state electrolyte membrane, which comprises the following steps: mixing an electrolyte, an organic monomer, an inorganic electrolyte and an initiator to obtain an electrolytic slurry; and coating a flexible base membrane with the electrolytic slurry, and carrying out cross-linking curing to obtain the flexible solid electrolyte membrane. The organic monomer can be polymerized to form the polymer electrolyte under the initiation of the initiator, the flexible base membrane has a loose net structure and can allow the inorganic electrolyte to pass through, the polymer electrolyte is subjected to cross-linking polymerization on the flexible base membrane, and the polymer electrolyte and the flexible base membrane are mutually cross-linked; and the inorganic electrolyte and the electrolyte are dispersed in a cross-linked polymerization structure of the polymer electrolyte and the flexible base membrane. The invention provides the flexible solid electrolyte membrane which is good in conductivity and good in charge and discharge performance after being prepared into a battery, and the preparation method thereof.

The application discloses an electrolyte film, a preparation method thereof, and a full solid-state battery. The electrolyte at least comprises: an inorganic electrolyte; and an organic electrolyte compound, which comprises: a porous material; and an organic electrolyte. The application introduces the porous adsorbed organic electrolyte into the electrolyte compound, so that the solid-state battery with the electrolyte compound can be formed and operated at low pressure, and excellent electrical performance and thermal stability are achieved.

The application relates to the technical field of lithium ion batteries, in particular to a modified nano single-crystal positive electrode material, a preparation method thereof and a solid-state battery. The preparation method of the modified nano single-crystal positive electrode material comprises the following steps: mixing a high-nickel positive electrode precursor material, a lithium salt and a grain boundary separation aid, carrying out first calcination and crushing to form a first intermediate; mixing the first intermediate with a fast ion conductor, carrying out second sintering to form the modified nano single-crystal positive electrode material; the grain boundary separation aid comprises a tungsten-containing heteropoly acid; the mass ratio of the grain boundary separation aid to the high-nickel positive electrode precursor material is (1-2):100; the fast ion conductor comprises at least one of a titanate, a niobate, a titanium niobate, a silicate, a phosphate, a phosphorus-iodine compound and an oxide type inorganic electrolyte. The modified nano single-crystal positive electrode material is nanoscale, the surface is coated with a limited fast ion conductor, the synergistic optimization of ion transmission, interface compatibility and interface stability can be realized, and the high-voltage stability is improved.

The invention discloses a composite porous membrane and a preparation method thereof, a battery and electric equipment, the composite porous membrane comprises an organic polymer base material and an inorganic electrolyte, the inorganic electrolyte is dispersed in the organic polymer base material, a plurality of pores with different pore sizes are formed in the composite porous membrane, and the inorganic electrolyte is dispersed in the organic polymer base material. The ionic conductivity of the composite porous membrane is 1 * 10 <-4 > S / cm to 5 * 10 <-4 > S / cm. Therefore, the holes in the organic polymer substrate, the inorganic electrolyte and the composite porous membrane can realize transmission of the active metal ions, the transmission path of the active metal ions is increased, the transmission rate of the active metal ions can be increased, and the power performance of the battery is improved.

The invention discloses a normal-temperature liquid aluminum-based oxyhalide inorganic electrolyte, and a preparation method and application thereof, and relates to the technical field of inorganic electrolytes. The general chemical formula is Li < x > Al (1-my) A < y > B < ny > Cl (3-x-3my) O < x >, xlt; 0.6, 0 < = y < lt >; 0.3, 2 < = n < = 5, 1 < = m < = 3; m is an integer, and n is an integer; a is at least one of Al, Ta, Nb, Hf, Zr, In, Zn, Y, B and Sc; and B is at least one of Cl, Br, S, I and N. The electrolyte disclosed by the invention is in a liquid state with relatively high viscosity at room temperature, has viscoelasticity and shows excellent ionic conductivity. The raw materials are simple, the cost is low, the synthesis is simple, convenient and rapid, the energy consumption is low, and the HCl gas generated by anion exchange has low boiling point and is not easy to remain in the system. After being doped with anions and cations, the liquid viscoelasticity is still kept at room temperature, and the ionic conductivity is still excellent.

The invention relates to the technical field of electrochemical energy storage, in particular to a multi-level solid electrolyte, a preparation method thereof, an electrochemical device and electronic equipment. The multi-level solid electrolyte comprises an interface stabilizing layer, an inorganic electrolyte compact layer and a high-pressure-resistant interface layer which are sequentially compounded, the ionic conductivity of the inorganic electrolyte compact layer is larger than 10 <-4 > S / cm, the interface stabilizing layer comprises a first polymer and chloride, and the high-pressure-resistant interface layer comprises a second polymer and high-pressure-resistant inorganic filler. And the oxygenolysis voltage of the high-voltage-resistant interface layer is greater than 4.5 V. The multi-level solid electrolyte provided by the invention has high ionic conductivity, excellent lithium dendrite inhibition capability and good interface stability at the same time.

The invention discloses a microcrystalline silicon-carbon composite material as well as a preparation method and application thereof, a slice electrode or a solid electrode is used as a working electrode, an inorganic electrolyte is added into a strong polar solution, and then alkylsilane or halogenated alkylsilane is added to prepare an electrolyte; a reference electrode and a counter electrode form a three-electrode electrolytic tank system for electrolysis, the voltage ranges from-2.0 V to-5.0 V, the working electrode is cleaned with an organic solvent after electrolysis is finished, and the microcrystalline silicon-carbon composite material is obtained after drying and carbonization. According to the prepared negative electrode material, a scanning electron microscope equipped with an energy dispersion X-ray spectrometer is adopted to perform point analysis on a specific micro-area of the microcrystalline silicon-carbon composite material, the content of silicon deposited between porous carbon is greater than or equal to 50%, and the content of silicon deposited in carbon particles is less than or equal to 10%. The prepared composite material is high in capacity and first coulombic efficiency, safe in preparation process, low in cost and easy to industrialize.

Disclosed in the present application are a composite porous membrane, a preparation method therefor, a battery and an electrical device. The composite porous membrane comprises an organic polymer substrate and an inorganic electrolyte, the inorganic electrolyte being dispersed in the organic polymer substrate. A plurality of holes of different diameters are formed in the composite porous membrane, the ionic conductivity of the composite porous membrane being 1*10-4 S / cm-5*10-4 S / cm. Thus, the organic polymer substrate, the inorganic electrolyte and the holes in the composite porous membrane can all transport active metal ions, which increases transport paths of the active metal ions, thereby increasing the transport rate of the active metal ions and accordingly improving the power performance of batteries.

The application belongs to the technical field of lithium batteries, and relates to a solid-state electrolyte, which comprises inorganic electrolyte powder, rigid ceramic particles and a polymer three-dimensional network structure, wherein the polymer three-dimensional network structure is coated on the surface of the rigid ceramic particles. After the polymer is coated on the surface of the rigid ceramic particles and mixed with the solid-state electrolyte and heated and pressurized, the polymer is transformed into a three-dimensional network structure, and the solid-state electrolyte is densified at the same time. The rigid ceramic particles play a stress conduction role. Further heating makes the low-molecular-weight polymer further polymerize, and the strength of the polymer three-dimensional network structure is enhanced, so that the mechanical strength of the solid-state electrolyte is improved, and the influence on the electrical conductivity is small.

The invention provides a negative plate as well as a preparation method and application thereof. The negative plate comprises a negative current collector and a negative active coating coated on at least one surface of the negative current collector, the negative electrode active coating comprises composite active particles, sulfide electrolyte and a conductive agent; wherein the composite active particle comprises a core and a coating layer, the core comprises a negative electrode active material, and the coating layer comprises an elastic composite electrolyte; the negative active material comprises a silicon element; the elastic composite electrolyte comprises a nano inorganic electrolyte and a polymer electrolyte. The coating layer of the elastic composite electrolyte is formed on the surface of the negative electrode active material, so that the volume expansion of silicon can be inhibited, the reduction decomposition of sulfide electrolyte is improved, the adhesive strength of the negative electrode active coating can be enhanced, and the lithium ion conduction performance of the negative electrode plate can be enhanced.

An all-inorganic electrolyte formulation for use in a lithium-ion battery system comprising at least one of each a phosphoranimine, a phosphazene, a monomeric organophosphate and a supporting lithium salt. The electrolyte preferably has a melting point below 0° C., and a vapor pressure of combustible components at 60.6° C. sufficiently low to not produce a combustible mixture in air, e.g., less than 40 mmHg at 30° C. The phosphoranimine, phosphazene, and monomeric phosphorus compound preferably do not have any direct halogen-phosphorus bonds. A solid electrolyte interface layer formed by the electrolyte with an electrode is preferably thermally stable ≥80° C.

The invention discloses a solid electrolyte diaphragm, a preparation method and a lithium battery. The solid electrolyte diaphragm comprises a base membrane and an electrolyte layer arranged on at least one side of the base membrane, and the electrolyte layer at least covers part of the surface of the base membrane; the electrolyte layer includes a polymer I. A polyacrylonitrile structure in the polymer I endows the electrolyte polymer I with a lithium ion conduction function, and the contact between an electrolyte diaphragm and an electrode is improved; the imide structure endows the electrolyte diaphragm with relatively high mechanical strength, enhances the stability of the polymer I at high temperature, and improves the thermal stability of the electrolyte diaphragm; the inorganic electrolyte group is grafted on the main chain of the polymer I, so that the polymer I forms a three-dimensional network, the ionic conductivity and the ionic mobility of the solid electrolyte diaphragm can be improved, the inorganic electrolyte group can be dispersed more uniformly in an electrolyte layer, and meanwhile, the thermal stability and the strength of the solid electrolyte diaphragm are improved.

The electrolyte for a lithium secondary battery according to embodiments of the present disclosure may include a lithium salt, a composite membrane comprising an inorganic electrolyte and an organic binder, and a flame-retardant polymer electrolyte. The lithium secondary battery according to embodiments of the present disclosure may include a positive electrode, a negative electrode facing the positive electrode, and an electrolyte layer disposed between the positive electrode and the negative electrode and containing an electrolyte for a secondary battery.

The application provides a preparation method of a full solid composite solid electrolyte film, and belongs to the technical field of solid electrolytes. In view of the problems of existing inorganic filler aggregation, low ion conductivity at room temperature and poor interface stability of an organic-inorganic composite solid electrolyte film, the application uses LLZTO inorganic electrolyte with high ion conductivity as a skeleton material, uses a polymer electrolyte PPC as a filler, effectively inhibits the agglomeration of the inorganic phase by using the three-dimensional form of the LLZTO, constructs a fast transmission channel for lithium ions, synchronously eliminates the Li2CO3 layer formed on the inorganic surface under air exposure by catalyzing the slow decomposition of the PPC into PC by the LLZTO, and improves the compatibility of the solid-solid contact interface. The composite solid electrolyte has high ion conductivity, improves the lithium ion migration number of the composite solid electrolyte, expands the electrochemical window, and greatly improves the cycle stability of the full battery.

A main objective of the present invention is to provide an electrolyte solution that exhibits good oxidation resistance and is capable of suppressing an increase in the specific resistance of the battery. The present invention achieves this objective by providing an electrolyte solution for use in a lithium-ion battery, characterized in that the lithium-ion battery contains a lithium metal as the active material for the anode, the electrolyte solution comprises an organic electrolyte solution and an inorganic electrolyte solution, and the inorganic electrolyte solution contains a lithium salt and sulfur dioxide (SO2).

An electrolyte for a lithium secondary battery according to an embodiment of the present invention may include a lithium salt, a composite film including an inorganic electrolyte and an organic binder, and a flame-retardant polymer. A lithium secondary battery according to an embodiment of the present invention may comprise: a positive electrode; the negative electrode is arranged opposite to the positive electrode; and an electrolyte layer that is provided between the positive electrode and the negative electrode and contains an electrolyte for the secondary battery.

The application relates to a sulfide electrolyte film and a preparation method thereof and a solid-state battery, and belongs to the technical field of solid-state batteries.A sulfide electrolyte film comprises a first electrolyte layer, a second electrolyte layer and a first electrolyte layer arranged in sequence; the first electrolyte layer comprises a plurality of sulfide inorganic electrolyte nanosheets, the second electrolyte layer comprises a plurality of sulfide inorganic electrolyte microparticles, the sulfide inorganic electrolyte in the nanosheets and the sulfide inorganic electrolyte in the microparticles have the same chemical composition; the thickness of each nanosheet is less than 400 nm, and the thickness of the first electrolyte layer is greater than or equal to 1 mu m.The sulfide electrolyte film provided by the application can significantly improve the critical current density and the lithium dendrite resistance of a lithium ion battery.

The invention provides a silicon-based rechargeable battery based on hydrogen chemistry and a preparation method thereof, and belongs to the technical field of electrochemistry and rechargeable batteries, and the silicon-based rechargeable battery based on hydrogen chemistry comprises a positive electrode, a negative electrode, an electrolyte, a solid electrolyte and hydrogen filled into the silicon-based rechargeable battery. Wherein the positive electrode comprises a hydrogen electrode, and the hydrogen electrode is a gas diffusion layer containing an electrocatalytic active substance; the negative electrode comprises a silicon-based electrode; the silicon-based electrode is selected from any one of a nano silicon electrode, a silicon-carbon composite electrode, a porous silicon electrode, a silicon monoxide electrode, a silicon-iron alloy electrode and a silicon-nickel alloy electrode; the electrolyte comprises inorganic electrolyte on the positive electrode side and organic electrolyte on the negative electrode side; the solid electrolyte is used for separating the inorganic electrolyte from the organic electrolyte, and meanwhile, the solid electrolyte is used for realizing migration of charge carriers between the positive electrode and the negative electrode in the charging and discharging process.

The invention relates to the technical field of solid-state batteries, in particular to a flame-retardant composite solid-state electrolyte and a preparation method and application thereof.The preparation method of the flame-retardant composite solid-state electrolyte comprises the steps that carbonic ester polymeric monomers, polymeric monomers containing amide groups and lithium salt are mixed, and a monomer solution is obtained; mixing the monomer solution with an inorganic electrolyte and an initiator to obtain a composite electrolyte precursor solution; and loading the composite electrolyte precursor solution on the polyimide porous membrane, and carrying out in-situ curing treatment to obtain the flame-retardant composite solid electrolyte. A polyimide porous membrane is used as a matrix, a carbonate polymeric monomer and an amide group-containing polymeric monomer are copolymerized to form an organic network, and a lithium salt for lithium ion transmission is compounded with an inorganic oxide solid electrolyte to realize organic-inorganic synergistic flame retardance; in addition, the inorganic electrolyte and a polymer chain form a three-dimensional skeleton structure, and a stable composite system is formed through oxygen vacancy anchoring.

The application discloses a kind of flexible solid electrolyte membrane and preparation method thereof, belong to solid battery technical field, specifically related to a kind of preparation method of flexible solid electrolyte membrane, comprising: electrolyte, organic monomer, inorganic electrolyte and initiator are mixed, and electrolytic slurry is obtained;Electrolytic slurry is coated on flexible base film, and crosslinking solidification is obtained, to obtain flexible solid electrolyte membrane.In the application, organic monomer can be polymerized to form polymer electrolyte under the initiation of initiator, flexible base film has loose network structure, can allow inorganic electrolyte to pass through, polymer electrolyte is crosslinked polymerization on flexible base film, polymer electrolyte and flexible base film are crosslinked each other, inorganic electrolyte and electrolyte are dispersed in the crosslinked polymerization structure of polymer electrolyte and flexible base film.The application is a kind of flexible solid electrolyte membrane and preparation method thereof with good conductivity, good charge-discharge performance after being made into battery.