公开(公告)号：US20230411689A1

公开(公告)日：2023-12-21

申请号：US18034377

申请日：2021-10-28

Applicant: SHENZHEN CAPCHEM TECHNOLOGY CO., LTD.

Inventor： Chaowei Cao ,  Chi Wang ,  Qun Chen ,  Shiguang Hu

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M2300/0025

Abstract: The present application belongs to the technical field of new energy, in particular to a non-aqueous electrolyte for a lithium ion battery and a lithium ion battery. The non-aqueous electrolyte for a lithium ion battery comprises a non-aqueous organic solvent, a lithium salt, and a spiro compound represented by Structural Formula 1. The compound represented by Structural Formula 1 has the characteristic of sulfonate additives to improve high-temperature storage performance of battery, and also has the characteristic of sulfate additives to improve high-temperature cycle performance of battery. A passivation film is deposited on the surface of positive electrode, and functional group X is further crosslinked to make the coated passivation film more compact and stable, which can effectively improve the electrochemical performance of the electrode, the storage performance and self-discharge performance of the battery.

公开(公告)号：US20240313263A1

公开(公告)日：2024-09-19

申请号：US18259300

申请日：2021-12-16

Applicant: Shenzhen Capchem Technology Co., Ltd.

Inventor： Shiguang Hu ,  Yunxian Qian ,  Chaowei Cao ,  Pengkai Guo ,  Xiaoxia Xiang ,  Chi Wang ,  Shuhuai Xiang ,  Qun Chen ,  Yonghong Deng

IPC: H01M10/0567 ,  C07D411/14 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  C07D411/14 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A lithium-ion battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode material layer, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material includes LiNixCoyMnzL(1-x-y-2)O2, where L is Al, Sr, Mg. Ti, Ca, Zr, Zn, Si, Cu, V or Fe, 0.5≤x≤1, 0≤y≤0.5, 0≤z≤0.5, 0≤x+y+z≤1, and an upper limit voltage of the lithium-ion battery is ≥4.2 V. The non-aqueous electrolyte includes a solvent, an electrolyte salt and a compound represented by formula 1: A-D-B-E-C, Formula 1. Based on a total mass of the non-aqueous electrolyte as 100%, the compound represented by the formula 1 is added in an amount of 0.01 to 5.0%.