Search

CN-122000436-A - Battery monomer and preparation method thereof, battery device, power utilization device and energy storage device

CN122000436ACN 122000436 ACN122000436 ACN 122000436ACN-122000436-A

Abstract

The application relates to the field of batteries, and provides a battery monomer and a preparation method thereof, a battery device, an electric device and an energy storage device, wherein the battery monomer comprises a battery core assembly, a battery core assembly and a battery module, wherein the battery core assembly is formed by laminating or winding a positive plate, a solid electrolyte film and a negative plate; the solid electrolyte membrane comprises a core conducting layer, an interface reinforcing layer and a mechanical supporting layer, wherein the core conducting layer is made of a metal-organic framework material. The MOF composite electrolyte membrane based on electric field induced directional growth adopts a multilayer collaborative design concept, and an integrated electrolyte system with high ionic conductivity, excellent mechanical property and interface stability is constructed through the precise combination of the lithium ion conductive MOF membrane body, the interface enhancement layer and the mechanical support layer. All layers form an integral structure through interface chemical bonding and physical compounding, so that function coordination and performance optimization are realized.

Inventors

  • CHEN JING
  • YANG ZIXIANG
  • SHI HAOTIAN
  • WU YUHAO

Assignees

  • 浙江晶科储能有限公司

Dates

Publication Date
20260508
Application Date
20260402

Claims (16)

  1. 1. A battery cell, comprising: The battery cell assembly is formed by laminating or winding a positive plate, a solid electrolyte membrane and a negative plate; The shell is provided with an accommodating space, and the battery cell assembly is positioned in the accommodating space; The solid electrolyte membrane comprises a core conducting layer, an interface reinforcing layer and a mechanical supporting layer, wherein the core conducting layer is made of a metal organic framework material.
  2. 2. The battery cell of claim 1, wherein the metal organic framework material has one-dimensional channels with a diameter of 0.6nm to 1.2nm, a pore volume of 0.1cm 3 /g~0.8cm 3 /g, and a BET specific surface area of 50cm 2 /g~800cm 2 /g.
  3. 3. The battery cell of claim 1 or 2, wherein the metal organic framework material comprises at least one of a dihydro/monohydrogen phosphate-containing bridged lithium conductive framework, a Zr/Ti-phosphonic acid-based rigid framework lithiated derivative, and a polyanionic metal-phosphonic acid/phosphonate/phosphonic acid-carboxylic acid hybrid framework.
  4. 4. The battery cell of claim 3, wherein the dihydro/monohydrogen phosphate-containing bridged lithium conductive frame has a molecular formula of Li 3 (H 2 PO 4 )(HPO 4 ) 2 .
  5. 5. The battery cell of claim 1, wherein the material of the interfacial reinforcement layer comprises a ceramic electrolyte.
  6. 6. The battery cell of claim 1, wherein the material of the mechanical support layer comprises a polymer.
  7. 7. A method for preparing a battery cell, comprising: Providing an electric core component, wherein the electric core component is formed by laminating or winding a positive plate, a solid electrolyte membrane and a negative plate; providing a shell, and placing the battery cell assembly in the shell; Carrying out a formation step; The solid electrolyte membrane comprises a core conducting layer, an interface reinforcing layer and a mechanical supporting layer, wherein the core conducting layer is made of a metal organic framework material.
  8. 8. The method for producing a battery cell according to claim 7, wherein the method for producing a metal-organic frame material comprises: Preparing a metal organic framework precursor solution; And (3) in a protective atmosphere, the metal organic frame precursor solution is subjected to electric field induced directional casting at 60-80 ℃ to obtain the metal organic frame material.
  9. 9. The method for preparing a battery cell according to claim 7, wherein the method for preparing the interface enhancing layer comprises: and performing sputter deposition on the surface of the core conducting layer to form the interface enhancement layer.
  10. 10. The method for preparing a battery cell according to claim 9, wherein in the sputtering deposition, the working air pressure is controlled to be 0.1 Pa-1 Pa, the sputtering power is 100W-500W, the substrate temperature is normal temperature-80 ℃, and the deposition rate is 0.05 nm/s-0.5 nm/s.
  11. 11. The method of claim 7, wherein the method of preparing the mechanical support layer comprises one of solution casting compounding and thermal compression compounding.
  12. 12. The method of preparing a battery cell according to claim 11, wherein the solution casting compounding method comprises: Dissolving a polymer in an organic solvent to form casting solution; And spreading the casting solution on the surface of the interface enhancement layer, and volatilizing the organic solvent at 80-120 ℃ to obtain the mechanical support layer.
  13. 13. The method for preparing a battery cell according to claim 11, wherein the hot press compounding method comprises: Preparing a polymer prefabricated film; And carrying out hot-pressing compounding on the polymer prefabricated film at 60-120 ℃ to obtain the mechanical support layer.
  14. 14. A battery device, characterized by comprising the battery cell according to any one of claims 1 to 6 or the battery cell obtained by the preparation method according to any one of claims 7 to 13, wherein the battery device comprises one or more of a battery module, a battery pack and an energy storage battery.
  15. 15. An electrical device, characterized in that it comprises a battery device according to claim 14, the battery device is used for providing electric energy.
  16. 16. An energy storage device comprising the battery device of claim 14 for storing electrical energy.

Description

Battery monomer and preparation method thereof, battery device, power utilization device and energy storage device Technical Field The application relates to the field of batteries, in particular to a battery monomer, a preparation method thereof, a battery device, an electricity utilization device and an energy storage device. Background Metal Organic Framework (MOF) materials have shown great potential in the field of solid state electrolytes in recent years due to their designable pore structure, high specific surface area and adjustable chemical composition. The regular pore structure of the MOF material provides ideal channels for ion transmission, and the organic-inorganic hybridization characteristic of the MOF material endows the material with excellent structural adjustability. In particular, lithium conductive MOFs, can achieve higher ionic conductivity by introducing lithium ion carriers or constructing lithium ion conducting channels in the framework structure. Disclosure of Invention The application provides a battery monomer, a preparation method thereof, a battery device, an electricity utilization device and an energy storage device, which are at least beneficial to realizing unification of room-temperature ion conductivity of >2 multiplied by 10 -3 S/cm, 4.5V high-voltage stability and excellent mechanical property, and provide an advanced electrolyte material solution for next-generation high-performance solid-state lithium ion batteries. In a first aspect, the present application provides a battery cell comprising: The battery cell assembly is formed by laminating or winding a positive plate, a solid electrolyte membrane and a negative plate; The shell is provided with an accommodating space, and the battery cell assembly is positioned in the accommodating space; The solid electrolyte membrane comprises a core conducting layer, an interface reinforcing layer and a mechanical supporting layer, wherein the core conducting layer is made of a metal organic framework material. Optionally, the metal organic framework material is provided with a one-dimensional pore canal, the diameter of the one-dimensional pore canal is 0.6 nm-1.2 nm, the pore volume is 0.1cm 3/g~0.8cm3/g, and the BET specific surface area is 50cm 2/g~800cm2/g. Optionally, the metal organic framework material comprises at least one of a dihydro/monohydrogen phosphate-containing bridged lithium conductive framework, a lithiated derivative of a Zr/Ti-phosphonic acid-based rigid framework, and a polyanionic metal-phosphonic acid/phosphonate/phosphonic acid-carboxylic acid hybrid framework. Optionally, the molecular formula of the lithium conductive framework containing dihydro/monohydrogen phosphate bridging is Li 3(H2PO4)(HPO4)2. Optionally, the material of the interface enhancing layer comprises a ceramic electrolyte. Optionally, the material of the mechanical support layer comprises a polymer. In a second aspect, the present application provides a method for preparing a battery cell, comprising: Providing an electric core component, wherein the electric core component is formed by laminating or winding a positive plate, a solid electrolyte membrane and a negative plate; providing a shell, and placing the battery cell assembly in the shell; Carrying out a formation step; The solid electrolyte membrane comprises a core conducting layer, an interface reinforcing layer and a mechanical supporting layer, wherein the core conducting layer is made of a metal organic framework material. Optionally, the preparation method of the metal organic framework material [ taking Li 3(H2PO4)(HPO4)2 as an example ] includes: Preparing a metal organic framework precursor solution; And (3) in a protective atmosphere, the metal organic frame precursor solution is subjected to electric field induced directional casting at 60-80 ℃ to obtain the metal organic frame material. Optionally, the temperature of the electric field induced directional casting is 65 ℃ to 75 ℃. Optionally, the preparation method of the metal organic framework precursor solution includes: Under inert atmosphere, dissolving a lithium source and a coordination component in a mixed solvent, and uniformly mixing to obtain the metal organic framework precursor solution, wherein the mixed solvent is a mixture of N, N-dimethylformamide and acetonitrile, and the total concentration of the lithium source and the coordination component in the metal organic framework precursor solution is controlled to be 50 mg/mL-200 mg/mL. Optionally, the volume ratio of the N, N-dimethylformamide to the acetonitrile is 1:1-3:1. Optionally, in the electric field induced directional casting, the electric field intensity is controlled to rise from the first electric field intensity to the second electric field intensity within 3-6 hours. Optionally, the first electric field strength is 0.05V/cm-0.1V/cm, the second electric field strength is 0.8V/cm-10V/cm, and the rising rate of the electric field strength