Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (6): 1153-1160.doi: 10.1007/s40242-020-0199-7

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Facile Route to Constructing Ternary Nanoalloy Bifunctional Oxyegn Cathode for Metal-Air Batteries

WANG Huanfeng1,2, LI Junfeng2, LI Fei2, LI Jingjing1, XU Jijing2,3   

  1. 1. College of Chemical and Food, Zhengzhou University of Technology, Zhengzhou 450044, P. R. China;
    2. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    3. International Center of Future Science, Jilin University, Changchun 130012, P. R. China
  • Received:2020-07-01 Revised:2020-08-21 Online:2020-12-01 Published:2020-12-03
  • Contact: XU Jijing E-mail:jijingxu@jlu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.51771177, 51972141), the Project of the Education Department of Jilin Province, China(No.JJKH20190113KJ), the Science and Technology Development Program of Jilin Province, China(No.20190303104SF), the Jilin Province/Jilin University Co-construction Project-Funds for New Materials, China (No.SXGJSF2017-3), the Science and Technology Breakthrough Plan of Henan Province, China(No.202102210242), the High School Key Scientific Research Project of Henan Province, China(No.21A150055) and the Youth Innovation Fund Project of Zhengzhou University of Technology, China(No.QNCXJJ2019K2).

Abstract: Highly stable and efficient bifunctional air cathode catalyst is crucial to rechargeable metal-air batteries. Herein, a ternary nanoalloy layer composed of noble and base metal coated on a three-dimensional porous Ni sponge as the bifunctional cathode is synthesized through in-situ anchoring strategy, which can effectively keep the multi-metal nanoparticles from agglomeration and improve the density of active sites and catalytic activity. The prepared catalyst displays an excellent catalytic performance with lower overpotential and long-term stability. The Zn-air batteries with the as-prepared cathodes possess a large power density of 170 mW/cm2, long cycling stability up to 230 cycles, and a high specific capacity of 771 mA·h/g. Furthermore, the corresponding Li-air batteries deliver a discharge capacity of 22429 mA·h/g. These superior properties of the metal-air batteries can be attributed to the combined influence of design and composition of electrode, which is of great significance to improve the electrochemical catalytic activity, providing great potential of wide application in expanded rechargeable energy systems.

Key words: Metal-air battery, Bifunctional cathode, Self-standing, Nanosheet, Electrochemical performance