阳极
阴极
电池(电)
电化学
镍
催化作用
析氧
材料科学
热解
电流密度
纳米技术
冶金
化学工程
化学
电极
物理
工程类
物理化学
有机化学
功率(物理)
量子力学
作者
Khaleel Ahmed J. Dilshad,M. K. Rabinal
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2021-07-26
卷期号:35 (15): 12588-12598
被引量:10
标识
DOI:10.1021/acs.energyfuels.1c01108
摘要
The formation of Zn dendrites and ZnO byproducts in Zn–air batteries is the reason for their poor performance, which needs urgent scrutiny. Here, an attempt is made to grow high-surface-area three-dimensional (3D) Zn nanoflakes on molecularly modified Zn surface. The approach is simple, cost effective, and straightforward for a large-scale production of anode. Additionally, Co3O4 as a catalyst for oxygen evolution is effectively immobilized on nickel foam by a simple spray pyrolysis technique. It provides a stable current density of 10 mA cm–2 at 1.51 V (vs reversible hydrogen electrode (RHE)). A Zn–air battery is assembled in a homemade setup and studied in detail for its electrochemical properties. It shows outstanding cycling stability of more than 500 charge–discharge cycles at 5 mA cm–2 (83 h). A comparative study is carried out for unmodified and modified Zn anodes. It is observed that molecular modification has a strong influence on battery performance. Hence, the present approach can be innovative in the development of next-generation Zn–air batteries.
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