公开(公告)号：US11316195B2

公开(公告)日：2022-04-26

申请号：US16343448

申请日：2017-07-18

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Zijun Xu ,  Chunhua Hu ,  Tiancheng Yi ,  Yingjie Zhan ,  Chengdu Liang

IPC分类号： H01M10/0567 ,  H01M10/0525 ,  H01M10/42

摘要： Energy storage materials, and specifically, an electrolyte and an electrochemical device, where the electrolyte includes an additive A and an additive B, the additive A is selected from multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one sulfonate compound. The electrochemical device includes the above electrolyte. The electrolyte can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, meanwhile the electrolyte can be adsorbed on catalytically active sites of the graphite surface to form a stable SEI film, thereby effectively reducing side reactions. The electrochemical device using the electrolyte has good high temperature and high voltage cycle performance and storage performance.

公开(公告)号：US10862170B2

公开(公告)日：2020-12-08

申请号：US16343326

申请日：2017-07-18

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Tiancheng Yi ,  Chunhua Hu ,  Li Hao ,  Yingjie Zhan ,  Chengdu Liang

IPC分类号： H01M10/0567 ,  H01M10/0525

摘要： The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and a battery using the electrolyte. The electrolyte contains an additive selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof. The addition of the multi-cyano six-membered N-heterocyclic compound as an additive in the electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material and inhibit oxidation of the electrolyte. The battery using the electrolyte according the present disclosure has good cycle performance at high temperature and high voltage and good storage performance, while gas production of the battery is reduced.

公开(公告)号：US10826122B2

公开(公告)日：2020-11-03

申请号：US15981716

申请日：2018-05-16

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Yingjie Zhan ,  Jian Yan ,  Songjun Shi ,  Lan Xie ,  Wenhao Liu

IPC分类号： H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

摘要： The present disclosure provides a lithium-ion battery, which comprises: a positive electrode plate containing a positive electrode active material, a negative electrode plate containing a negative electrode active material and an electrolyte. The positive electrode active material comprises: a core and a coating layer coating a surface of the core and comprising boron. The electrolyte comprises a lithium salt, a non-aqueous organic solvent and an electrolyte additive, the electrolyte additive comprises an organic titanium compound. The coating layer of the positive electrode active material of the lithium-ion battery according to the present disclosure contains boron, and the electrolyte of the lithium-ion battery contains the organic titanium compound, under the combined effect of the coating layer containing boron and the electrolyte containing the organic titanium compound, the lithium-ion battery has excellent high temperature cycle performance and excellent high temperature storage performance.