Preparation method of all-solid-state lithium-air battery cathode

An air battery, all-solid-state technology, applied in battery electrodes, fuel cell half-cells and secondary battery-type half-cells, circuits, etc. Less problems, to achieve good lithium ion transport capacity and electronic conductivity, high electronic conductivity, rich pore channels and pore structure

Inactive Publication Date: 2021-01-05
JIANGSU UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the positive electrode structure of lithium-air batteries, it needs to meet the three requirements of electronic conductivity, lithium ion conductivity and rich pores. The current common preparation method is to combine catalyst materials, conductive carbon black and solid electrolyte powder The positive electrode is prepared by mixing. This contact method achieves less three-phase interface in the electrode and poor electrochemical performance.
At the same time, the solid-solid contact interface between the electrode and the solid electrolyte also makes the transmission of lithium ions more hindered and the transmission efficiency is low.

Method used

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  • Preparation method of all-solid-state lithium-air battery cathode
  • Preparation method of all-solid-state lithium-air battery cathode
  • Preparation method of all-solid-state lithium-air battery cathode

Examples

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Embodiment Construction

[0031] 1. Preparation of polymer solid electrolyte membrane.

[0032] Weigh 2.87g of lithium bistrifluoromethanesulfonylimide (LiTFSI) and dissolve it in 10ml of dimethyl sulfoxide (DMSO), stir and dissolve evenly, and mark it as solution A. Weigh 2 g of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and add it into 15 ml of acetone, stir and dissolve evenly, and mark it as solution B. Weigh 7g of solution A, add it to the above solution B, stir evenly to form a mixed solution, which is marked as solution C. Slowly pour solution C onto a glass plate with a flat surface, wait for the liquid to evaporate naturally, and then peel off from the glass plate to obtain a polymer solid electrolyte membrane.

[0033] 2. Preparation of flexible solid cathode.

[0034] Preparation of Co by hydrothermal method 3 o 4 Catalyst material: Weigh 0.5g of cobalt acetate tetrahydrate and dissolve it in a mixed solution of 30ml of deionized water and 30ml of absolute ethanol, stir ...

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Abstract

The invention belongs to the technical field of batteries, and particularly discloses a preparation method of an all-solid-state lithium air battery cathode with a flexible characteristic. Through reasonable design of the positive electrode structure and introduction of the polymer electrolyte as a lithium ion transmission skeleton, the cathode with high lithium ion transmission capability, high electronic conductivity and rich pore structures is prepared, so that the performance of the solid-state lithium air battery is improved. The prepared cathode has a flexible characteristic and can be applied to a flexible solid-state lithium-air battery. The invention provides a new way for efficient and controllable preparation of the cathode of the all-solid-state lithium-air battery, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of batteries, and specifically discloses a method for preparing a positive electrode of an all-solid-state lithium-air battery with flexible characteristics. Background technique [0002] In recent years, with the depletion of fossil energy and the environmental pollution caused by vehicle exhaust, the development of electric vehicles has received widespread attention worldwide. Among them, the development of an energy storage battery system with high energy density is an important task and a major technical bottleneck in the development of electric vehicles. At present, the vast majority of electric vehicles use lithium-ion batteries as power sources. However, the energy density of lithium-ion batteries is limited, and it is difficult to meet the requirements of ultra-long mileage of electric vehicles in the future. Therefore, a next-generation energy storage battery with higher energy density has been deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M12/08
CPCH01M4/8605H01M4/8652H01M4/88H01M12/08
Inventor 曹学成王楠韩贞毅
Owner JIANGSU UNIV
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