Advanced Hollow Cubic FeCo‐N‐C Cathode Electrocatalyst for Ultrahigh‐Power Aluminum–Air Battery

Author:

Tian Zhidong123ORCID,Liang Yiqi13,Chen Kai1,Gao Jiyuan1,Lu Zhiwen13,Hu Xiang1,Ding Yichun13,Wen Zhenhai13ORCID

Affiliation:

1. CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

2. College of Chemistry and Materials Science Fujian Normal University Fuzhou 350000 China

3. Fujian College University of Chinese Academy of Sciences Fuzhou Fujian 350002 China

Abstract

AbstractThe 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 H2–O2 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.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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