Electrolyte, electrochemical device containing same, and electronic device
AssigneeNingde Amperex Technology Limited
InventorsShaoyun Zhou, Chao Tang
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Abstract
An electrolyte, an electrochemical device containing same, and an electronic device. Specifically, an electrolyte, including dimethyl carbonate, ethyl methyl carbonate, and lithium bis(oxalato)borate. The ethyl methyl carbonate and the lithium bis(oxalato)borate each account for a specified weight percent in the electrolyte, and the weight percent of the dimethyl carbonate and the weight percent of the ethyl methyl carbonate in the electrolyte meet a specified relationship. The electrolyte provides with balanced rate performance, the low-temperature discharge performance, and the high-temperature storage and cycle performance of the electrochemical device, and helps to achieve excellent comprehensive performance of the electrochemical device.
Claims19
An electrolyte, comprising:
- dimethyl carbonate, ethyl methyl carbonate and lithium bis(oxalato) borate;
- wherein, based on a weight of the electrolyte, a weight percent of the dimethyl carbonate is a %, a weight percent of the ethyl methyl carbonate is b %, and a weight percent of the lithium bis(oxalato) borate is c %, and
- 40<a+b<70;
- 15.1≤b≤55;
- 0<c<1;
- and a<45.
An electrochemical device, comprising a positive electrode and an electrolyte;
- wherein the electrolyte comprising:
- dimethyl carbonate, ethyl methyl carbonate and lithium bis(oxalato) borate;
- based on a weight of the electrolyte, a weight percent of the dimethyl carbonate is a %, a weight percent of the ethyl methyl carbonate is b %, and a weight percent of the lithium bis(oxalato) borate is c %, and
- 40<a+b<70;
- 15.1≤b≤55;
- 0<c<1;
- and a<45;
- wherein the positive electrode comprises a positive active material, and the positive active material comprises manganese.
An electronic device, comprising an electrochemical device, wherein,
- the electrochemical device, comprising a positive electrode and an electrolyte;
- wherein the electrolyte comprising:
- dimethyl carbonate, ethyl methyl carbonate and lithium bis(oxalato) borate;
- based on a weight of the electrolyte, a weight percent of the dimethyl carbonate is a %, a weight percent of the ethyl methyl carbonate is b %, and a weight percent of the lithium bis(oxalato) borate is c %, and
- 40<a+b<70;
- 15.1≤b≤55;
- 0<c<1;
- and a<45;
- wherein the positive electrode comprises a positive active material, and the positive active material comprises manganese.
Dependencies are inferred from the claim text.