The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2018
Filed:
Oct. 22, 2014
Shenzhen Capchem Technology Co., Ltd., Shenzhen, Guangdong, CN;
SHENZHEN CAPCHEM TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
The present invention relates to electrolyte of a high-voltage lithium-ion battery, comprising a non-aqueous organic solvent, lithium salt and an electrolyte additive; the electrolyte additive comprises the following ingredients based on the total weight of the electrolyte: 1%-10% of fluoroethylene carbonate, 1%-5% of dinitrile compound and 0.1%-2% of 2-methyl maleic anhydride; further, the electrolyte can be further added with additives such as 0.2%-2% of lithium bisoxalatoborate and 1,3-propane sultone. The present invention also relates to a high-voltage lithium-ion battery using the electrolyte, with the charging cut-off voltage being greater than 4.2V and smaller than or equal to 4.5V. The electrolyte of the high-voltage lithium-ion battery provided by the present invention can protect the positive electrode and also form good SEI at the negative electrode, and the high-voltage lithium-ion battery has good cycle performance and storage performance.