US 12,334,498 B2
Electrolyte, electrochemical device, and electronic device
Xiexue Peng, Fujian (CN); Jianming Zheng, Fujian (CN); and Chao Tang, Fujian (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed by Ningde Amperex Technology Limited, Fujian (CN)
Filed on Mar. 30, 2022, as Appl. No. 17/708,617.
Application 17/708,617 is a continuation of application No. PCT/CN2020/138741, filed on Dec. 23, 2020.
Prior Publication US 2022/0223914 A1, Jul. 14, 2022
Int. Cl. H01M 10/0567 (2010.01)
CPC H01M 10/0567 (2013.01) [H01M 2300/0025 (2013.01)] 16 Claims
 
1. An electrolyte, comprising a compound represented by formula I-A;

OG Complex Work Unit Chemistry
wherein A1, A2, and A3 are each independently selected from formula I-B or formula I-C, and at least two of A1, A2, and A3 are formula I-C;

OG Complex Work Unit Chemistry
wherein in formula I-A, n is selected from integers 1 to 10, and m is 1;
wherein in formula I-B and formula I-C, custom character represents a site at which two adjacent atoms are joined;
wherein R11 and R13 are each independently selected from substituted or unsubstituted C2-C10 alkylene groups, substituted or unsubstituted C2-C10 alkenylene groups, substituted or unsubstituted C2-C10 alkynylene groups, substituted or unsubstituted C3-C10 allenylene groups, substituted or unsubstituted C6-C10 arylene groups, or substituted or unsubstituted C3-C10 alicyclic hydrocarbon groups, and when substituted, a substituent group comprises a halogen; and
R12 is independently selected from halogens, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C2-C10 alkenyl groups, substituted or unsubstituted C2-C10 alkynyl groups, substituted or unsubstituted C3-C10 cumulative diene groups, substituted or unsubstituted C6-C10 aryl groups, or substituted or unsubstituted C3-C10 alicyclic hydrocarbon groups, and when substituted, a substituent group comprises a halogen,
wherein the electrolyte further comprises a multi-nitrile compound, wherein the multi-nitrile compound comprises at least one of 1,2,3-tris(2-cyanoethoxy)propane, 1,3,6-hexanetricarbonitrile, 1,2-bis(2-cyanoethoxy)ethane, or adiponitrile, and
wherein a ratio of a mass percentage of the compound represented by formula I-A to a mass percentage of the multi-nitrile compound is 0.01 to 1.