A Novel Method to Prepare Flexible 3D NiO Nanosheets Electrodes for Alkaline Rechargeable Ni−Zn Batteries. Issue 12 (17th May 2021)

• Record Type: Journal Article
• Authors: Zhou, Kai; Guo, Xinying; Guo, Yuanyuan; Zhuang, Ruoxi; Chen, Huifeng; Wang, Shuai; Bao, Yu; Han, Dongxue; Niu, Li
• Is Part Of: ChemElectroChem. Volume 8:Issue 12(2021)
• Page Start: 2214
• Page End: 2220
• Publication Date: 2021-05-17
• Subjects: Ni−Zn battery -- flexibility -- green synthesis -- 3D materials -- NiO; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202100338
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: The combination of excellent mechanical properties and electrochemical performances of Ni‐based cathodes is fascinating and challenging for Ni−Zn batteries. Herein, a novel and eco‐friendly strategy of the cycle of Ni 2+ hydrolysis and H + etching process at Ni/solution interface under moderate temperature is demonstrated to synthesize the three‐dimensional NiO nanosheets array supported on pressed Ni foam electrode (denoted as NiO/PNF). The as‐prepared NiO/PNF electrode exhibits outstanding mechanical flexibility and stability with a capacity of 5.08 mAh cm −3 . The assembled NiO/PNF||Zn battery presents peak energy and power densities up to 5.2 mW h cm −3 and 1944.4 mW cm −3 . Abstract : Green synthesis : A new strategy for the cycle of Ni 2+ hydrolysis and H + etching process at solid/solution interface to synthesize a 3D binder‐free and highly flexible electrode with porous NiO nanosheets array on pressed Ni foam (NiO/PNF). The NiO/PNF electrode shows a significantly volumetric capacity of 5.08 mAh cm −3 . Additionally, the assembled NiO/PNF||Zn battery presents a maximum energy density of 5.2 mW h cm −3 .