Electrolyte and lithium ion battery inducing same

An electrolyte and lithium salt technology, applied in secondary batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve problems affecting battery performance and poor thermal stability, improve high-temperature storage performance and safety performance, and improve cycle performance effect

Active Publication Date: 2016-02-24
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LiPF 6 It is easy to hydrolyze and has poor thermal stability. When in contact with the moisture in the air or the residual water in the solvent, HF will be formed immediately, which will affect the performance of the battery, such as cycle performance and safety performance.

Method used

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  • Electrolyte and lithium ion battery inducing same
  • Electrolyte and lithium ion battery inducing same
  • Electrolyte and lithium ion battery inducing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～20

[0092] Preparation of Examples 1-20 Conventional Lithium-ion Batteries 1-20, Special-shaped Lithium-ion Batteries S1-S20

[0093] Conventional lithium-ion batteries (hereinafter referred to as batteries) 1-20, and special-shaped lithium-ion batteries (hereinafter referred to as batteries S) 1-20 are prepared according to the following method:

[0094] (1) Preparation of positive electrode sheet

[0095] Lithium cobalt oxide (LiCoO 2 ), binder (polyvinylidene fluoride), conductive agent (acetylene black) according to the weight ratio of LiCoO 2 : polyvinylidene fluoride: acetylene black = 98: 1: 1 to mix, add N-methylpyrrolidone (NMP), stir under the action of a vacuum mixer until the system becomes uniform and transparent, and obtain positive electrode slurry; Coated on an aluminum foil with a thickness of 12 μm; the aluminum foil was dried at room temperature and then transferred to an oven at 120° C. for 1 hour, and then subjected to cold pressing and slitting to obtain a ...

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Abstract

The invention relates to an electrolyte. The electrolyte comprises a lithium salt, an organic solvent and an additive, wherein the lithium salt comprises a heteroaromatic-ring lithium salt with nitrogen atoms on a heterocyclic ring, the additive comprises an additive A, and the additive A is one or more selected from the group consisting of a fluoro-ether compound, a siloxane compound, a silane phosphate compound and a silane borate compound. The electrolyte provided by the invention can improve high temperature cycle performance, high-temperature storage performance and safety performance of a lithium ion battery.

Description

technical field [0001] The present application relates to the technical field of lithium-ion batteries, in particular, to an electrolyte and a lithium-ion battery including the electrolyte. Background technique [0002] At present, in mobile electronic devices, the battery placement space is almost not a regular cuboid. In addition, the arrangement of electronic devices in mobile electronic devices often has a stepped irregular distribution. In view of this, batteries with special shapes The irregular space in the mobile electronic device can be fully utilized, thereby increasing the capacity of the entire battery. However, the safety performance of special-shaped batteries is poor. [0003] The use of lithium salts with excellent performance is the key to obtain lithium-ion batteries with excellent performance. At this stage, the lithium salt used in lithium-ion batteries is mainly LiPF 6 . However, LiPF 6 It is easy to hydrolyze and has poor thermal stability. When it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0567
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 庄锐锐
Owner NINGDE AMPEREX TECH
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