Journal article

Metastable Rock Salt Oxide-Mediated Synthesis of High-Density Dual-Protected M@NC for Long-Life Rechargeable Zinc-Air Batteries with Record Power Density

Tang Tang, Wen-Jie Jiang, Xiao-Zhi Liu, Jun Deng, Shuai Niu, Bin Wang, Shi-Feng Jin, Qiang Zhang, Lin Gu, Jin-Song Hu, Li-Jun Wan

Journal of the American Chemical Society | AMER CHEMICAL SOC | Published : 2020

Abstract

Creating high-density durable bifunctional active sites in an air electrode is essential but still challenging for a long-life rechargeable zinc-air battery with appealing power density. Herein, we discover a general strategy mediated by metastable rock salt oxides for achieving high-density well-defined transition-metal nanocrystals encapsulated in N-doped carbon shells (M@NC) which are anchored on a substrate by a porous carbon network as highly active and durable bifunctional catalytic sites. Small-size (15 ± 5 nm) well-dispersed Co2Fe1@NC in a high density (metal loading up to 54.0 wt %) offers the zinc-air battery a record power density of 423.7 mW cm-2. The dual protection from the com..

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University of Melbourne Researchers

Grants

Awarded by National Key Research and Development Program of China


Awarded by National Natural Science Foundation of China


Funding Acknowledgements

We acknowledge the financial support from the National Key Research and Development Program of China (2016YFB0101202) and the National Natural Science Foundation of China (21773263 and 91645123). We also thank the following staff scientists at the Center for Analysis and Testing, ICCAS for their help: Dr. Z. J. Zhao and X. Y. Zhang for XPS analysis; Dr. B. Guan and J.-L. Yue for SEM and TEM support, and Y. Sun for in-situ temperaturedependent XRD experiments.