公开(公告)号：US20160301104A1

公开(公告)日：2016-10-13

申请号：US15037699

申请日：2014-10-22

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Dixiong Zhou

IPC: H01M10/0567 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0034 ,  H01M2300/0042

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.

Abstract translation: 本发明涉及包含非水有机溶剂，锂盐和电解质添加剂的高压锂离子电池的电解质; 电解质添加剂包含以电解质总量计的以下成分：1％-10％的氟代碳酸亚乙酯，1％-5％的二腈化合物和0.1％-2％的2-甲基马来酸酐; 此外，电解质可以进一步添加添加剂，例如0.2％-2％的双草酸硼酸锂和1,3-丙磺酸内酯。 本发明还涉及使用电解质的高压锂离子电池，充电截止电压大于4.2V且小于或等于4.5V。 本发明提供的高电压锂离子电池的电解质可以保护正极，并且在负电极上形成良好的SEI，高压锂离子电池具有良好的循环性能和存储性能。

公开(公告)号：US10084205B2

公开(公告)日：2018-09-25

申请号：US15037699

申请日：2014-10-22

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Qiao Shi ,  Muchong Lin ,  Dixiong Zhou

IPC: H01M10/056 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0034 ,  H01M2300/0042

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.