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Phosphite ester stabilizer and non-aqueous electrolyte comprising stabilizer

A phosphite, non-aqueous electrolyte technology, applied in non-aqueous electrolytes, organic electrolytes, circuits, etc., can solve the problems of unpleasant electrolyte odor, great harm to human body, and high volatility, and achieve obvious stability and effect. , The effect of solving the unpleasant smell and improving the ability

Inactive Publication Date: 2014-07-02
DONGGUAN SHANSHAN BATTERY MATERIALS
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Problems solved by technology

[0004] At present, the stabilizers used in non-aqueous electrolytes are mainly phosphites with small molecular weights. Although such stabilizers can play a stabilizing role, their low boiling point and high volatility lead to the electrolyte odor of such stabilizers. Unpleasant smell, due to certain toxicity, it is more harmful to the human body

Method used

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  • Phosphite ester stabilizer and non-aqueous electrolyte comprising stabilizer
  • Phosphite ester stabilizer and non-aqueous electrolyte comprising stabilizer
  • Phosphite ester stabilizer and non-aqueous electrolyte comprising stabilizer

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[0024] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, and to analyze the advantages and spirit of the present invention, a further understanding of the present invention can be obtained through the following detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0025] The phosphite stabilizer of the non-aqueous electrolyte of the present invention is one or more mixtures of compounds represented by general formula (1) or (2):

[0026]

[0027] (1) where R 1 , R 2 , R 3 The number of carbon atoms is C 16 ~C 20 Alkyl, aryl, R 1 , R 2 , R 3 Can be the same or different; the alkyl group can be selected from one to three of hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl or its isomers and halogenated compounds; The aryl group can be selected from one to three of tri-n-butylphenyl, tri-sec-butylphenyl, triisobutylphenyl...

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Abstract

The invention provides a phosphite ester stabilizer applicable to a non-aqueous electrolyte and the non-aqueous electrolyte comprising the stabilizer. The non-aqueous electrolyte comprises lithium salt, carbonic ester organic solvents, conventional additives and the phosphite ester stabilizer; the addition amount of the phosphite ester stabilizer in the non-aqueous electrolyte is 100ppm-1000ppm.

Description

technical field [0001] The invention relates to the technical field of nonaqueous electrolytes, in particular to a phosphite stabilizer and a nonaqueous electrolyte containing the phosphite stabilizer. Background technique [0002] Due to the characteristics of high energy density, high specific power, good cycle performance, no memory effect, and no pollution, lithium-ion batteries have been widely used in digital products and are also ideal for future electric vehicle energy. [0003] Lithium hexafluorophosphate (LiPF) as electrolyte 6 ), which has poor thermal stability and is easily decomposed into phosphorus pentafluoride (PF 5 ), the presence of phosphorus pentafluoride will cause the polymerization of ethylene carbonate, dimethyl carbonate or protic solvent impurities in the electrolyte to form soluble monomers, dimers, and oligomers. With the conjugated system in the polymer Increase, the red shift of the polymer spectrum shows the chromogenic group, which leads to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 丁祥欢朱智聪
Owner DONGGUAN SHANSHAN BATTERY MATERIALS
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