Lithium ion battery electrolyte with wide temperature range

Lithium ion battery electrolyte with wide temperature range

The invention discloses a lithium ion battery electrolyte with a wide temperature range. The electrolyte comprises an organic solvent, a lithium salt system and additives. The additives comprise a high-temperature additive and a film-forming additive. The film-forming additive is selected from at le...

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Hauptverfasser: GAO JIAN, ZHOU XUE, FENG YOUZENG, GU QIN, WANG MING
Format: Patent
Sprache:chi ; eng
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator GAO JIAN
ZHOU XUE
FENG YOUZENG
GU QIN
WANG MING
description The invention discloses a lithium ion battery electrolyte with a wide temperature range. The electrolyte comprises an organic solvent, a lithium salt system and additives. The additives comprise a high-temperature additive and a film-forming additive. The film-forming additive is selected from at least one of film-forming additives represented by a structural formula (I) and a structural formula (II), and the film-forming additive accounts for 0.1-10% of the total mass of the electrolyte. And the film-forming additive can form a stable SEI film with small impedance on the surface of the negative electrode in the activation process, so that the discharge capacity of the battery at low temperature and the cycling stability of the battery at high temperature are improved. And the electrolytelithium salt can further improve the high-temperature stability and the low-temperature discharge performance of the electrolyte. The organic solvent can reduce the freezing point of the whole electrolyte and improve the mobi
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title Lithium ion battery electrolyte with wide temperature range
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