US 12,334,494 B2
Electrolyte and electrochemical device
Lilan Zhang, Ningde (CN); Chao Tang, Ningde (CN); and Jianming Zheng, Ningde (CN)
Assigned to Ningde Amperex Technology Limited, Ningde (CN)
Filed by Ningde Amperex Technology Limited, Fujian (CN)
Filed on Mar. 18, 2024, as Appl. No. 18/607,737.
Application 18/607,737 is a continuation of application No. 16/970,864, granted, now 11,967,674, previously published as PCT/CN2020/077638, filed on Mar. 3, 2020.
Prior Publication US 2024/0243344 A1, Jul. 18, 2024
Int. Cl. H01M 10/0525 (2010.01); H01M 10/0567 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 10/0525 (2013.01) [H01M 10/0567 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0025 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrochemical device, comprising: a positive electrode, a negative electrode, a separator, and an electrolyte; wherein
the electrolyte comprises a nitrile compound, wherein
the nitrile compound comprises at least one of:

OG Complex Work Unit Chemistry
and a mass percentage of the nitrile compound in the electrolyte, A %, is 0.1% to 10%;
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, B %, is 0.4% to 54% of a surface area of the current collector; and
A×B<600.