US 9,812,739 B2
Electrolyte additive and use thereof in lithium-ion battery
Wang Kefei, NingDe (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, NingDe (CN)
Filed by NingDe Amperex Technology Limited, NingDe (CN)
Filed on Mar. 21, 2016, as Appl. No. 15/76,410.
Claims priority of application No. 2015 1 0147276 (CN), filed on Mar. 31, 2015.
Prior Publication US 2016/0294007 A1, Oct. 6, 2016
Int. Cl. H01M 10/052 (2010.01); H01M 10/0567 (2010.01); H01M 10/42 (2006.01)
CPC H01M 10/4235 (2013.01) [H01M 10/052 (2013.01); H01M 10/0567 (2013.01); H01M 2300/0025 (2013.01)] 11 Claims
 
1. An electrolyte additive, comprising:
hexane-1,3,6-tricarbonitrile;
ethylene sulfate;
vinylene carbonate; and
3,3-bis(cyanomethyl)pentane dinitrile.
 
3. An electrolyte solution, comprising:
an organic solvent comprising ethyl propionate;
a lithium salt; and
an additive comprising:
hexane-1,3,6-tricarbonitrile;
ethylene sulfate; and
vinylene carbonate, wherein a percentage by weight of vinylene carbonate in the electrolyte solution is 0.1% to 1%.