US 12,347,869 B2
Preparation methods of composite current collectors for zinc secondary batteries, negative electrode plates, and zinc secondary batteries
Song Xu, Xinxiang (CN); Mingyu Wang, Xinxiang (CN); Liangsheng Li, Xinxiang (CN); Liangdong Zhao, Xinxiang (CN); and Enbo Shangguan, Xinxiang (CN)
Assigned to HENAN CHAOLI NEW ENERGY CO., LTD., Xinxiang (CN); and CHAOWEI POWER GROUP CO., LTD., Huzhou (CN)
Filed by HENAN CHAOLI NEW ENERGY CO., LTD., Henan (CN); and CHAOWEI POWER GROUP CO., LTD., Zhejiang (CN)
Filed on Jul. 10, 2024, as Appl. No. 18/768,034.
Application 18/768,034 is a continuation of application No. PCT/CN2023/070012, filed on Jan. 2, 2023.
Claims priority of application No. 202210018880.X (CN), filed on Jan. 10, 2022.
Prior Publication US 2024/0363869 A1, Oct. 31, 2024
Int. Cl. H01M 4/64 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/66 (2006.01); H01M 4/70 (2006.01); H01M 4/72 (2006.01); H01M 4/74 (2006.01); H01M 10/054 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/667 (2013.01) [H01M 4/134 (2013.01); H01M 4/38 (2013.01); H01M 4/483 (2013.01); H01M 4/661 (2013.01); H01M 4/663 (2013.01); H01M 4/668 (2013.01); H01M 4/747 (2013.01); H01M 10/054 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A preparation method of a composite current collector for a zinc secondary battery, comprising the following steps:
1) disposing a layer of carbon cloth between two layers of zinc mesh, each layer of the zinc mesh being a composite zinc mesh, and mesh pores of the zinc mesh being filled with tin, thermally pressing the two layers of zinc mesh with the carbon cloth, and rolling the two layers of zinc mesh with the carbon cloth to obtain a pressed zinc mesh, a reduction rate of the two layers of zinc mesh during rolling being within a range of 10-50%;
2) soaking the pressed zinc mesh in a graphene dispersion, then taking out and drying the pressed zinc mesh after soaking; and
3) coating two surfaces of the dried pressed zinc mesh with a conductive paste and drying the coated zinc mesh to obtain the composite current collector for the zinc secondary battery, the conductive paste containing a conductive polymer.