Carbonate solvents for non-aqueous electrolytes for metal and metal-ion batteries

A metal ion, battery pack technology, applied in non-aqueous electrolytes, hybrid capacitor electrolytes, electrolytes, etc., can solve problems that do not represent the best solution for the problem of aluminum dissolution in anodes, and do not represent the best substitute for conventional solvents.

Pending Publication Date: 2021-12-14
에스쎄으프랑스
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The above schemes for inhibiting aluminum corrosion do not represent the best solution for the problem of anodic aluminum dissolution, therefore they do not represent the best alternatives for conventional solvents

Method used

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  • Carbonate solvents for non-aqueous electrolytes for metal and metal-ion batteries
  • Carbonate solvents for non-aqueous electrolytes for metal and metal-ion batteries
  • Carbonate solvents for non-aqueous electrolytes for metal and metal-ion batteries

Examples

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preparation example Construction

[0304] The preparation of carbonate solvents of the present invention on a small scale is most conveniently accomplished by base-catalyzed transesterification of readily available dimethyl carbonate, diethyl carbonate, ethylene carbonate or propylene with aliphatic alcohols in the presence of a suitable catalyst. The transesterification of carbonates follows the same rules as transesterification of other esters and is a typical equilibrium reaction that can be easily controlled using Le Chatelier's principle. The ratio between alcohol and carbonate determines the ratio of products in a perfectly balanced reaction mixture. If complete substitution is desired, excess alcohol should be used. If the desired product is a mixed carbonate, the molar ratio should be close to 1, or a slight excess of the starting carbonate should be used. During the course of the reaction, it is desirable to steadily remove the reaction product from the reaction mixture; this allows the reaction to pr...

Embodiment 60

[0337] Example 60 involves measuring the temperature ranges of the electrolytes of the present invention and conventional electrolytes by performing digital scanning calorimetry (DSC) experiments.

Embodiment 61

[0338] Example 61 involved measuring the discharge capacity versus cycle number of three cells; two cells containing the electrolyte of the invention and one containing a conventional electrolyte.

[0339] The preparation of carbonate solvent of the present invention

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Abstract

There is provided a metal or metal-ion battery comprising an aluminum current collector and a low-corrosiveness non-aqueous electrolyte comprising, as a solvent, a carbonate compound of formula (I): (I). This battery has an upper voltage limit of about 4.2 V or more and anodic dissolution of aluminum during battery operation at said voltage is suppressed.

Description

field of invention [0001] The present invention relates to carbonate solvents for non-aqueous electrolytes of batteries. More specifically, the present invention relates to carbonate solvents for non-aqueous electrolytes characterized by their low corrosion to aluminum current collectors at voltages higher than 4.2 V vs. Li metal. Background of the invention [0003] New technological solutions for the electrification of telecommunications, especially transport batteries, have been proposed for lithium and lithium-ion batteries. Their goal is to provide such batteries with the highest possible energy density for higher voltage cathodes. However, this requires high-performance electrolytes that resist oxidation at the high potentials that occur during operation of such systems. Additionally, other parasitic processes may cause system degradation and failure. One such parasitic process is corrosion of the current collector or dissolution of the electrolyte, which typically ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0569H01M4/66
CPCH01M10/0569H01M4/661H01M2300/0091C07C69/96C07C255/14C07F7/1804H01M10/0568H01M10/0567H01M10/0525H01M10/054H01M2300/0028H01G11/60H01G11/62H01G11/64Y02E60/10Y02P70/50
Inventor M·科泽尔C·佩蒂特S·帕耶K·扎吉布
Owner 에스쎄으프랑스
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