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Preparation method of integrated high-performance electrode for solid-state battery

A solid-state battery, high-performance technology, applied in battery electrodes, electrode manufacturing, electrolyte battery manufacturing, etc., can solve problems such as hindering lithium ion intercalation and extraction, reducing material specific capacity, increasing mass transfer resistance, etc., to facilitate industrial scale-up production, Broad application prospects and the effect of reducing interface resistance

Pending Publication Date: 2021-10-26
成都巴莫科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method of modifying the positive electrode material may reduce the interfacial resistance to a certain extent, the coating of the positive electrode material hinders the intercalation and extraction of lithium ions to a certain extent, increases the mass transfer resistance, and reduces the material ratio. Capacity, therefore, is not a fundamental solution to the problem of interfacial mass transfer resistance
In addition, in traditional solid-state batteries, the positive electrode layer, solid electrolyte layer, and negative electrode layer are independent of each other, and they are formed by hot pressing in the later stage, and there is still a large interface resistance between the layers.

Method used

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  • Preparation method of integrated high-performance electrode for solid-state battery
  • Preparation method of integrated high-performance electrode for solid-state battery
  • Preparation method of integrated high-performance electrode for solid-state battery

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preparation example Construction

[0040] The present invention provides a method of integrating high-performance electrodes comprising the step of: first dispersion of a positive electrode material, a binder in a solid electrolyte solution, and then spray mixed positive electrode suspension into a set The positive electrode composite electrode is formed on the fluid. After the solvent is completely volatilized, the lithium powder is directly sprayed directly on the opposite side of the collector, i.e., the integrated high-performance electrode for solid state cells.

[0041] Preferably, the method of preparing the integrated high performance electrode is as follows:

[0042] 1) Complete solid electrolyte is completely dissolved in solvent to form a solid electrolyte solution;

[0043] 2) In the solid electrolyte solution, the ultrasonic dispersion is uniform, and the mixed positive electrode suspension is generated.

[0044] 3) Add the mixed positive electrode suspension to the spray gun, using nitrogen as carrier g...

Embodiment 1

[0059] A method for the preparation of high performance electrodes, the specific steps are as follows:

[0060] 1) 100 g of PEO is completely dissolved in 50 ml of ethanol solution to form a solid electrolyte solution;

[0061] 2) 10 g of NCM811 material, 20 ml 5 wt.% Nafion solution, the ultrasonic dispersion is uniform, and the ultrasonic dispersion is uniform, forming a mixed positive suspension;

[0062] 3) Add the mixed positive electrode suspension into the spray gun, using nitrogen as the carrier gas, slowly spray it to the surface of the copper foil, sprayed the layer, to evaporate, repeatedly sprayed it, repeatedly sprayed all of them. After obtaining the positive electrode composite electrode;

[0063] 4) A 10 g of lithium powder is placed in an injector of the electrostatic spraying apparatus, and the lithium powder is sprayed on the opposite side of the positive electrode composite electrode aggregate fluid, i.e., the integrated high-performance electrode.

[0064] The...

Embodiment 2

[0068] A method for the preparation of high performance electrodes, the specific steps are as follows:

[0069] 1) 100 g of PEO is completely dissolved in 50 ml of ethanol solution to form a solid electrolyte solution;

[0070] 2) In the solid-state electrolyte solution prepared by 20 g of NCM811 material, 10 ml 5 wt.% Nafion solution, ultrasonic dispersion is uniform, and the hypervisor is formed, and the mixed positive electrode suspension is formed;

[0071] 3) Add the mixed positive electrode suspension into the spray gun, using nitrogen as the carrier gas, slowly spray it to the surface of the copper foil, sprayed the layer, to evaporate, repeatedly sprayed it, repeatedly sprayed all of them. After obtaining the positive electrode composite electrode;

[0072] 4) A 15 g of lithium powder is placed in an injector of the electrostatic spraying apparatus, and the lithium powder is sprayed on the opposite side of the positive electrode composite electrode aggregate fluid, i.e., t...

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Abstract

The invention provides a preparation method of an integrated high-performance electrode for a solid-state battery, which comprises the following steps: dispersing a positive electrode material and a binder in a solid-state electrolyte solution to form a mixed positive electrode suspension, spraying the mixed positive electrode suspension onto a current collector to form a positive electrode composite electrode by adopting a spraying method, and after the solvent is completely volatilized, directly spraying lithium powder on the opposite side of the current collector to obtain the integrated high-performance electrode for the solid-state battery. Compared with a traditional three-layer lamination method of the positive electrode, the negative electrode and the solid electrolyte layer, the method has the advantages that the positive electrode and the solid electrolyte are fused and molded, the negative electrode is directly sprayed with the lithium powder, and the structure can reduce the interface resistance and the impedance of the electrode plate to the greatest extent and improve the performance of the solid-state battery.

Description

Technical field [0001] The present invention belongs to the field of solid state, and more particularly to a method of preparing a high-performance electrode for a solid-state battery. Background technique [0002] With the development of technology, traditional liquid lithium battery safety issues may become the largest obstacle to the development of liquid lithium batteries in the future, mainly due to their electrolyte as flammable organic matter. [0003] Solid state batteries are techniques for replacing electrolytes and diaphragms with solid electrolytes. On the one hand, the solid electrolyte is provided with ion conductivity, and can replace the conventional electrolyte, which acts in transmitting lithium ions between the positive and negative electrons; on the other hand, the solid electrolyte is not easy to combustion, and there is electron insulation, can be replaced by the separator, isolated Positive and negative, prevent short circuit, with extremely high security. ...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M4/1395H01M4/1397H01M4/04H01M10/058H01M10/052
CPCH01M4/1391H01M4/1397H01M4/1395H01M4/0419H01M4/0404H01M10/058H01M10/052Y02P70/50Y02E60/10
Inventor 程晓焜覃金吕菲徐宁吴孟涛
Owner 成都巴莫科技有限责任公司
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