Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (4): 636-641.doi: 10.1007/s40242-023-3107-0

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CeO2 Supported on Reduced Graphene Oxide as Li-O2 Battery Cathode

FU Zerui1, WANG Shu1, YU Haohan1, NIE Meilin1, FENG Xilan1, ZUO Xintao1, FU Lichao1, LIU Dapeng1, ZHANG Yu1,2   

  1. 1. Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P.R. China;
    2. Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, P.R. China
  • Received:2023-04-21 Online:2023-08-01 Published:2023-07-18
  • Contact: LIU Dapeng, ZHANG Yu E-mail:liudp@buaa.edu.cn;jade@buaa.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.51925202, 51972008, 51702236).

Abstract: Li-O2 battery(LOB) has an ultrahigh specific capacity(3500 W·h/kg), however, its slow kinetics of oxygen reduction reaction(ORR) and oxygen evolution reaction(OER) at cathode often leads to a high overpotential, a limited discharge capacity, and a poor cycling performance. Therefore, it is important to design and prepare cathode materials with a excellent catalytic activity. In this study, CeO2 nanoparticles(NPs) supported on reduced graphene oxide(rGO) have been prepared and employed as cathode. Compared with either CeO2 NPs or rGO, CeO2/rGO cathode greatly improves the discharge capacity(10644 mA·h/g at a current density of 100 mA/g) and the cycling performance(95 cycles at 200 mA/g with a limited capacity of 500 mA·h/g) by virtue of the good conductivity of rGO and the oxygen storage/release capability of CeO2.

Key words: Li-O2 battery, Cathode, CeO2nanoparticle, Reduced graphene oxide