US 12,237,503 B2
Preparation method of a zinc-carbon composite electrode material used in zinc ion energy storage device
Yong Chen, Hainan (CN); and Chen Chen, Hainan (CN)
Assigned to HAINAN UNIVERSITY, Hainan (CN)
Appl. No. 17/594,477
Filed by HAINAN UNIVERSITY, Hainan (CN)
PCT Filed Jun. 28, 2021, PCT No. PCT/CN2021/102703
§ 371(c)(1), (2) Date Oct. 18, 2021,
PCT Pub. No. WO2022/179018, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 202110211151.1 (CN), filed on Feb. 25, 2021.
Prior Publication US 2023/0223524 A1, Jul. 13, 2023
Int. Cl. H01M 4/38 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 4/74 (2006.01); H01M 10/04 (2006.01); H01M 10/054 (2010.01); H01M 10/36 (2010.01); H01M 50/126 (2021.01)
CPC H01M 4/38 (2013.01) [H01M 4/043 (2013.01); H01M 4/0471 (2013.01); H01M 4/623 (2013.01); H01M 4/625 (2013.01); H01M 4/669 (2013.01); H01M 4/74 (2013.01); H01M 10/0427 (2013.01); H01M 10/054 (2013.01); H01M 10/36 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A preparation method of a zinc ion energy storage device, comprising:
S1, preparing a zinc-carbon composite negative electrode material: grinding zinc powder particles and a powdered carbon additive material; the grinding being a mechanical grinding or a manual grinding; after grinding, putting a combination of ground zinc powder particles and a ground powdered carbon additive material in a vacuum drying cabinet and drying at a drying temperature of 100° C. to 130° C. with a drying time of 2 to 8 hours to obtain the zinc-carbon composite negative electrode material;
S2, preparing an electrode paste: evenly mixing the zinc-carbon composite negative electrode material and polytetrafluoroethylene, with a mass ratio of the zinc-carbon composite negative electrode material being 85% to 95%, and a mass ratio of the polytetrafluoroethylene being 5% to 15%, and obtaining the electrode paste; wherein, the electrode paste consists of a binder and the zinc-carbon composite negative electrode material; the zinc-carbon composite negative electrode material consists of the ground zinc powder particles and the ground powdered carbon additive material; the ground powdered carbon additive material in the step S1 account for 1-10% of a mass of the electrode paste except for the binder; the ground zinc powder particles in the step S1 account for 90-99% of the mass of the electrode paste except for the binder; and the polytetrafluoroethylene serves as the binder;
S3, pressing the electrode paste into a thin sheet with a thickness of 150 μm to 300 and putting the thin sheet into an electric thermostatic drier for drying at the drying temperature of 60° C. to 120° C. with the drying time of 1 to 8 hours;
S4, cutting the thin sheet into a disc with a diameter of 8 mm to 12 mm by a sheet-punching machine, and moving the disc into the vacuum drying cabinet for drying at the drying temperature of 100° C. to 130° C. with the drying time of 10 to 15 hours; and
S5, pressing the disc dried in step S4 onto a stainless steel mesh current collector and using the stainless steel mesh current collector in a button battery.