US 12,272,824 B2
Lithium metal negative electrode, preparation method therefor, and related lithium metal battery and device
Chengyong Liu, Fujian (CN); Meng Cheng, Fujian (CN); Ang Fu, Fujian (CN); Bobing Hu, Fujian (CN); Yongsheng Guo, Fujian (CN); and Quan Fan, 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 Mar. 23, 2023, as Appl. No. 18/125,174.
Application 18/125,174 is a continuation of application No. PCT/CN2021/128641, filed on Nov. 4, 2021.
Claims priority of application No. 202011320607.X (CN), filed on Nov. 23, 2020.
Prior Publication US 2023/0223545 A1, Jul. 13, 2023
Int. Cl. H01M 4/62 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/1395 (2010.01); H01M 4/38 (2006.01); H01M 10/052 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/628 (2013.01) [H01M 4/0402 (2013.01); H01M 4/134 (2013.01); H01M 4/1395 (2013.01); H01M 4/382 (2013.01); H01M 10/052 (2013.01); H01M 2004/027 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A lithium metal negative electrode, comprising:
a negative electrode current collector;
at least one lithium-based metal layer provided on at least one surface of the negative electrode current collector; and
an ion-conducting polymer modification layer, which is a layer of gel located on a surface of one of the at least one lithium-based metal layer and comprises at least a catalytic amount of a Lewis acid, the Lewis acid containing cations of a metal capable of forming an alloy-type active material with lithium,
wherein the ion-conducting polymer modification layer has a compressive modulus of elasticity of 0.01 MPa to 1 MPa.
 
11. A method for preparing the lithium metal negative electrode according to claim 1, comprising the steps of:
providing a lithium metal negative electrode to be modified comprising the negative electrode current collector and the lithium-based metal layer provided on at least one surface of the negative electrode current collector;
providing a mixed solution comprising the Lewis acid and a monomer, wherein the Lewis acid contains the cations of the metal capable of forming the alloy-type active material with lithium; and
covering a surface of the lithium-based metal layer with the mixed solution, such that the ion-conducting polymer modification layer is formed by means of polymerization of the monomer under the catalysis of the Lewis acid, so as to obtain the lithium metal negative electrode.