Shenzhen Capchem Technology Co., Ltd.

Qun Chen

Qiao Shi

Shiguang Hu

Xue Zhou

Qi Huang

Li Wei Wang

Jiaojiao Yun

Chaowei Cao

Zhou He

Chi Wang

Bubble machine

A lithium-ion battery non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises at least one selected from the compounds represented by structural formula I and II; in formula I, R1 and R2 are independently selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms; in formula II, R3 is selected from alkenyl having 2-5 carbon atoms and alkynyl having 2-5 carbon atoms. The compound represented by formula I or II is added in the electrolyte; the compound contains unsaturated bond(s) and hexafluorisopropyl; the unsaturated bond(s) form passivation film on cathode and anode surfaces to inhibit decomposition of the electrolyte on the cathode & anode surface and damage of the cathode material structure; moreover, the polymerization degree of unsaturated bond(s) can be inhibited to some extent due to steric hindrance relationship of fluoroisopropyl functional groups, so as to improve high-temperature performance of the lithium-ion battery while guaranteeing low-temperature performance.

Non-aqueous electrolyte of lithium-ion battery and lithium-ion battery

An electrolyte for a lithium-ion battery and a lithium-ion battery. The electrolyte for a lithium-ion battery comprises a non-aqueous organic solvent, a lithium salt, and an electrolyte additive. The additive is selected from compounds of formula 1, wherein R1 is selected from unsaturated alkyls having three to six carbon atoms, and R2 is selected from alkylenes having two to five carbon atoms. Because the molecular structure of the additive comprises both unsaturated carbon-carbon bonds and cyanos, polymerization can occur on an electrode surface to form a compound containing multiple cyanos. The compound can be complexed with metal ions on a surface of a cathode material, thereby inhibiting electrolyte decomposition on an electrode surface to improve high-temperature storage and cyclability of a battery. 

Electrolyte for lithium-ion battery and lithium-ion battery

Disclosed is a lithium ion battery non-aqueous electrolyte and a lithium ion battery, in which the electrolyte comprises: a non-aqueous organic solvent, a lithium salt and an additive, said additive comprises: a compound represented by the structural formula 1 and a compound represented by the structural formula 2, in which R is an alkyl selected from an alkyl group having 1 to 4 carbon atoms, the ratio of the content of the compound represented by the structural formula 1 to the total mass of the lithium ion battery non-aqueous electrolyte is 0.1% to 2%, and the ratio of the content of the compound represented by the structural formula 2 to the total mass of the lithium ion battery non-aqueous electrolyte is less than 0.5%. 

Lithium ion battery non-aqueous electrolyte and lithium ion battery

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Qun Chen