磷化物
材料科学
双金属片
镍
纳米片
化学工程
热液循环
钴
锌
纳米技术
冶金
金属
工程类
作者
Tianyu Fu,Xin Tong,Yang Zhou,Dajun Wu,Dayuan Xiong,Shaohui Xu,Lianwei Wang,Paul K. Chu
标识
DOI:10.1016/j.jallcom.2022.165734
摘要
Nickel-cobalt bimetallic phosphide (CNP) samples with a flower-like nanosheet morphology are prepared on nickel foam by a simple one-step hydrothermal method to form the cathodes in zinc-nickel batteries. The electrode materials possess not only synergistic properties rendered by nickel and cobalt, but also high theoretical specific capacity and electronic conductivity of transition metal phosphide. The quasi-solid-state batteries assembled with the phosphide electrode, zinc sheet, and hydrogel electrolyte are assessed in alkaline media. The flexible Zn-CNP battery shows an areal capacity of 3.75 mA h cm−2 at a high current density of 50 mA cm−2 and retains 93% of its capacity after 2000 cycles (at 80 mA cm−2). Furthermore, the quasi-solid-state battery continues to function despite being bent at different angles or after puncturing. The results reveal a novel strategy to design bimetallic phosphide electrodes in zinc-ion batteries for flexible and wearable applications.
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