Patent ID: 11967674
Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An electrochemical device, comprising: a positive electrode, a negative electrode, a separator and an electrolyte; wherein
the electrolyte comprises a nitrile compound, and a mass percentage of the nitrile compound in the electrolyte is A %;
the negative electrode comprises a current collector, wherein the current collector comprises a first region and a second region;
a negative electrode active substance layer is provided only in the first region;
an area of the second region is B % of the surface area of the current collector; and
A×B<600;
wherein the electrolyte further comprises an anion, the anion comprises at least one of Cl−, Br−, SO42−, CO32− or F−, and
the content of the anion in the electrolyte is more than or equal to 100 ppm, and less than or equal to 1000 ppm.