电催化剂
电池(电)
阴极
材料科学
电解质
阳极
催化作用
氧还原反应
铝
化学工程
纳米技术
功率(物理)
电极
冶金
化学
物理化学
电化学
工程类
物理
热力学
有机化学
作者
Zhidong Tian,Yiqi Liang,Kai Chen,Jiyuan Gao,Zhiwen Lu,Xiang Hu,Yichun Ding,Zhenhai Wen
出处
期刊:Small
[Wiley]
日期:2024-03-28
标识
DOI:10.1002/smll.202310694
摘要
Abstract The exploration of electrocatalysts toward oxygen reduction reaction (ORR) is pivotal in the development of diverse batteries and fuel cells that rely on ORR. Here, a FeCo‐N‐C electrocatalyst (FeCo–HNC) featuring with atomically dispersed dual metal sites (Fe–Co) and hollow cubic structure is reported, which exhibits high activity for electrocatalysis of ORR in alkaline electrolyte, as evidenced by a half‐wave potential of 0.907 V, outperforming that of the commercial Pt/C catalyst. The practicality of such FeCo–HNC catalyst is demonstrated by integrating it as the cathode catalyst into an alkaline aluminum–air battery (AAB) paring with an aluminum plate serving as the anode. This AAB demonstrates an unprecedented power density of 804 mW cm −2 in ambient air and an impressive 1200 mW cm −2 in an oxygen‐rich environment. These results not only establish a new benchmark but also set a groundbreaking record for the highest power density among all AABs reported to date. Moreover, they stand shoulder to shoulder with state‐of‐the‐art H 2 –O 2 fuel cells. This AAB exhibits robust stability with continuous operation for an impressive 200 h. This groundbreaking achievement underscores the immense potential and forward strides that the present work brings to the field.
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