Electrolyte additive and lithium ion battery using the same

An electrolyte additive and lithium-ion battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as increased interface impedance, reduced kinetics of lithium ion migration and diffusion, battery rate and cycle performance attenuation, etc., to achieve Effects of improving stability, suppressing surface decomposition of positive electrode, and excellent high-temperature storage performance
CN104852087AActive Publication Date: 2015-08-19CONTEMPORARY AMPEREX TECH CO
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CONTEMPORARY AMPEREX TECH CO
Publication Date
2015-08-19

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Abstract

The application discloses an electrolyte additive and application of the electrolyte additive in a lithium ion battery. The electrolyte additive comprises multi-cyano compounds and boracic lithium salts. When the electrolyte additive is applied to the lithium ion battery, the lithium ion battery is enabled to have excellent high temperature cyclic performance and excellent high-temperature storage characteristics.
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Description

technical field

[0001] The application relates to an electrolyte additive, which belongs to the field of lithium ion batteries. Background technique

[0002] In recent years, with the rapid development of smart electronic products, higher requirements have been placed on the battery life of lithium-ion batteries. In order to increase the energy density of lithium-ion batteries, developing high-voltage lithium-ion batteries is one of the effective methods.

[0003] At present, lithium-ion batteries with an operating voltage above 4.35V have become a research hotspot for many scientific research institutes and enterprises. However, under high voltage, the oxidation activity of the positive electrode material increases and the stability decreases, which leads to the electrochemical oxidation reaction of the non-aqueous electrolyte on the surface of the positive electrode, and then decomposes to generate gas. At the same time, the transition metal elements (such as nickel, cob...

Claims

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