US 12,283,717 B2
Composite separator, electrochemical energy storage apparatus, and electrical apparatus
Manman Wang, Fujian (CN); and Xiaoming Ge, Fujian (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 May 26, 2023, as Appl. No. 18/202,293.
Application 18/202,293 is a continuation of application No. PCT/CN2022/095241, filed on May 26, 2022.
Claims priority of application No. 202111150172.3 (CN), filed on Sep. 29, 2021.
Prior Publication US 2023/0327288 A1, Oct. 12, 2023
Int. Cl. H01M 50/449 (2021.01); H01M 10/0525 (2010.01); H01M 50/431 (2021.01)
CPC H01M 50/449 (2021.01) [H01M 10/0525 (2013.01); H01M 50/431 (2021.01); H01M 2220/20 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A composite separator, comprising:
a first base film and a second base film; and
an anode protection layer located between the first base film and the second base film in a thickness direction of the composite separator, for capturing transition metal ions, wherein
the anode protection layer comprises a complexing agent and a first oxide nanoparticle, the first oxide nanoparticle being capable of generating lithium oxide and a first elementary substance through a replacement reaction with metal lithium, and
a weight ratio of the complexing agent to the first oxide nanoparticle is from 0.06 to 0.13.