Construction of Low-Crystallinity Three-Dimensional Flower-like Cobalt-Doped Nickel Hydroxide for High-Performance Nickel–Zinc Batteries

• DOI: 10.1021/acsami.4c19500
• Publication Date: 2025-01-22T06:52:16Z
• Authors: Lihong Zheng; Fenyun Yi; Jiahui Liang; Min Lu; Jie kong; Aimei Gao; Dong Shu
• Keywords: Cobalt extraction techniques; Zinc hydroxide

The main limitations of aqueous nickel-zinc batteries are their relatively low energy density and short cycle life, which inextricably linked to the nickel-based cathodes. In this study, a low-crystallinity flower-like cobalt-doped nickel hydroxide (α-Ni(OH)2-0.2Co) is constructed by hydrothermal reaction employed as high-energy-density cathode for rechargeable batteries. Cobalt doping initiates formation structure lowers material's crystallinity, conferring it with larger specific surface area, more redox sites, shorter ion diffusion paths. optimized α-Ni(OH)2-0.2Co electrode manifests considerable capacity 772 C·g-1 at 1 A·g-1 remarkable rate performance, retention 75% 10 A·g-1. α-Ni(OH)2-0.2Co//Zn battery exhibits 198 mAh·g-1 in an alkaline electrolyte. Additionally, substantial 326.7 Wh·kg-1 power 16.5 kW·kg-1, exceeding performance metrics most previously documented This research presents viable approach developing advanced materials