US 12,230,763 B2
Secondary battery and device comprising the same
Zeli Wu, Ningde (CN); and Changlong Han, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on Oct. 26, 2021, as Appl. No. 17/510,696.
Application 17/510,696 is a continuation of application No. PCT/CN2019/127983, filed on Dec. 24, 2019.
Prior Publication US 2022/0045365 A1, Feb. 10, 2022
Int. Cl. H01M 10/0569 (2010.01); H01M 4/38 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/583 (2010.01); H01M 10/0567 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0569 (2013.01) [H01M 4/386 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/583 (2013.01); H01M 10/0567 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0054 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A secondary battery, comprising:
a negative electrode plate that comprises a negative electrode film, wherein the negative electrode film comprises a negative electrode active material;
electrolyte that comprises an electrolyte salt, an organic solvent and an additive, wherein
the negative electrode active material comprises a silicon-based material;
the organic solvent comprises dimethyl carbonate (DMC), ethylene carbonate (EC), and ethyl methyl carbonate (EMC), wherein a mass ratio of the dimethyl carbonate (DMC) in the organic solvent is ≤20%, a mass ratio of the ethylene carbonate (EC) in the organic solvent is ≤15%, a mass ratio of the ethyl methyl carbonate (EMC) in the organic solvent is 65%˜95%; and
the additive comprises one or more of compound shown in Formula 1 below, wherein a mass ratio of the compound shown in Formula 1 in the electrolyte is ≤1%;

OG Complex Work Unit Chemistry
where, R1 is selected from one or more of C2˜C4 alkylene or halogenated alkylene, C2˜C4 alkenylene or halogenated alkenylene, C6˜C18 arylene and derivatives thereof.