公开(公告)号：US20230318038A1

公开(公告)日：2023-10-05

申请号：US18331320

申请日：2023-06-08

Applicant: Ningde Amperex Technology Limited

Inventor： Shuirong ZHANG ,  Lilan ZHANG ,  Xiao YUAN ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/134 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/134 ,  H01M10/0569 ,  H01M2004/027

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte, where the electrolyte includes fluoroethylene carbonate and non-fluorinated cyclic carbonate, the fluoroethylene carbonate accounts for a % of the electrolyte by mass, and the non-fluorinated cyclic carbonate accounts for b % of the electrolyte by mass, where 0.05≤a/b≤2.5.

公开(公告)号：US20240243358A1

公开(公告)日：2024-07-18

申请号：US18398341

申请日：2023-12-28

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Xiexue PENG ,  Xiao YUAN ,  Chao TANG

IPC: H01M10/0567 ,  C01B25/455 ,  C01B35/12 ,  H01M4/02 ,  H01M4/38 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C01B25/455 ,  C01B35/121 ,  H01M4/38 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/4235 ,  C01P2006/40 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025

Abstract: An electrolytic solution includes an additive A and an additive B. The additive A includes at least one of additives represented by Formula I or Formula II:




The additive B includes at least one of lithium ditluorophosphate, lithiur difluoro(oxalato)borate, or lithium bis(oxalato)borate. The additive A and additive B added in the electrolytic solution can alleviate the voltage drop of the electrochemical device during high-temperature storage, and increase the capacity retention rate of the electrochemical device during high-temperature storage. Moreover, when the electrochemical device is in a fully charged state, the additive A and additive B can implement decomposition reactions at a cathode interface successively to form a double-protected inorganic CEI layer, thereby improving voltage stability of the cathode interface under high potentials.

公开(公告)号：US20220223915A1

公开(公告)日：2022-07-14

申请号：US17708622

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： ShuiRong ZHANG ,  Xiao YUAN ,  Lilan ZHANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0568

Abstract: An electrolyte including a dinitrile compound, a multi-nitrile compound with more than 2 cyano groups, and a boron-containing lithium salt. Based on a total weight of the electrolyte, a content of the dinitrile compound is A %, a content of the multi-nitrile compound is B %, and a content of the boron-containing lithium salt is C %, and 0≤(A/B)−C+1≤11. The cycle performance of the electrochemical device including the electrolyte is improved at a high temperature and in a high state of charge.