电池(电)
催化作用
材料科学
锌
化学工程
尖晶石
氧化物
功率密度
析氧
无机化学
电极
化学
电化学
冶金
物理化学
有机化学
功率(物理)
工程类
物理
量子力学
作者
Nengneng Xu,Qi Nie,Jiawen Liu,Haitao Huang,Jinli Qiao,Xiao Dong Zhou
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2020-01-04
卷期号:167 (5): 050512-050512
被引量:15
标识
DOI:10.1149/1945-7111/ab6e5d
摘要
Nowadays, it is very challenging to develop a low-cost, highly active and stable bi-functional catalyst for accelerating oxygen reduction reaction (ORR) and oxygen evolution (OER) reaction during the charge and discharge process of zinc-air battery. Herein, we successfully design a novel bi-metal oxide hybrid catalyst (ZnCo 2 O 4 -CNT) by inserting Zn ions. Benefiting from the robust synergetic effects between porous ZnCo 2 O 4 and CNTs, the high conductivity and the unique nanostructure, the ZnCo 2 O 4 -CNT shows lots of accessible active sites and improved reactants and electrons transfer. As expected, the hybrid shows higher ORR and OER performances with larger limited diffusion current density (5.72 mA cm −2 ) and lower OER over-potential (0.49 V) than Pt/C and other ZnCo 2 O 4 -CNT samples. In addition, rechargeable zinc-air battery assembled with the bi-functional catalyst exhibits a high power density of 249.4 mW cm −2 , a strong discharge durability and charge-discharge stability of 240 cycles. Notably, the flexible zinc-air battery also shows good battery performances with high power density and good flexibility. Hence, exploiting efficient bi-functional catalytic materials with excellent ORR and OER performance and assembling flexible devices will improve the development of current zinc-air batteries battery industry.
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