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Metal-air battery

A metal-air battery and metal salt technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of increasing the risk of explosion, decreasing battery capacity, and accelerating the deterioration of the negative electrode, so as to improve cycle stability and discharge capacity , the effect of preventing damage

Inactive Publication Date: 2021-01-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the impurities in water will react severely with active metals to form hydroxides and organic electrolytes. This irreversible side reaction leads to a decrease in battery capacity and battery failure.
Secondly, water will destroy the solid electrolyte liquid interface layer on the surface of the metal negative electrode and accelerate the deterioration of the negative electrode.
In addition, water can induce the formation of hydrogen gas in metals, which increases the risk of explosion

Method used

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Examples

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Effect test

Embodiment 1

[0045] Taking lithium-air batteries as an example, the basic electrolyte of lithium-air batteries was prepared: the electrolyte was a mixed system of tetraethylene glycol dimethyl ether and lithium bistrifluoromethanesulfonylimide, and bis Lithium trifluoromethanesulfonyl imide was stirred and confirmed to be completely dissolved to obtain a basic electrolyte, in which lithium bistrifluoromethanesulfonyl imide was 0.2moL / L, 0.5moL / L, 1moL / L, and 2moL / L , 2.5moL / L;

[0046] Preparation of electrolyte solution for lithium-air batteries: in a glove box filled with argon (moisture <0.1ppm, oxygen content <0.1ppm), add hexamethyldisilazane to the basic electrolyte solution in an amount of 0.05moL / L , 0.1moL / L, 0.2moL / L, 0.5moL / L, the structural formula of the additive is as follows:

[0047]

[0048] Assembled battery: the positive electrode active material of the lithium-air battery is carbon nanotubes coated on the porous current collector, the negative electrode is a circula...

Embodiment 2

[0053] In a glove box (moisture <0.1ppm, oxygen <0.1ppm) filled with argon gas, add hexamethyldisilazane (0.1moL / L, sodium salt is bistrisulfate) to the required sodium-air battery electrolyte Sodium fluoromethanesulfonylimide), the prepared electrolyte is applied to a sodium-air battery and assembled into a sodium-air battery. Other steps are with embodiment 1.

Embodiment 3

[0055] In a glove box filled with argon (moisture content <0.1ppm, oxygen content <0.1ppm), add hexamethyldisilazane (0.1moL / L, potassium salt is bistri Potassium fluoromethanesulfonylimide), the prepared electrolyte is applied to a potassium-air battery and assembled into a potassium-air battery. Other steps are with embodiment 1.

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Abstract

The invention relates to a metal-air battery, which has a semi-open structure. The metal-air battery comprises: a positive electrode, a metal negative electrode and an electrolyte solution; wherein the electrolyte solution comprises a metal salt, an organic solvent and an additive; the additive is a silazane compound, and the molar concentration of the silazane compound in the electrolyte solutionis 0.01-1moL / L.

Description

technical field [0001] The invention relates to a metal-air battery and belongs to the technical field of batteries. Background technique [0002] With the gradual consumption of fossil fuels and the increasingly serious pollution of the urban environment, the development and use of pure electric and hybrid vehicles have attracted more and more attention. Due to the limitation of the energy density of lithium-ion batteries, the current continuous driving distance of electric vehicles is still much lower than that of internal combustion engine vehicles. As a new generation of energy supply equipment for electric vehicles, metal-air batteries (potassium-air batteries, lithium-air batteries, sodium-air batteries, etc.) have become a research hotspot in academia due to their relatively simple structure, high theoretical energy density, and low cost. [0003] At present, most scholars are only focusing on the performance research of metal-oxygen batteries, because metal-air batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M12/08
CPCH01M10/0567H01M12/08H01M2300/0025Y02E60/10
Inventor 张涛张易楠孙壮
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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