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

• Published in: Chemical research in Chinese universities Vol. 39; no. 4; pp. 636 - 641
• Main Authors: Fu, Zerui, Wang, Shu, Yu, Haohan, Nie, Meilin, Feng, Xilan, Zuo, Xintao, Fu, Lichao, Liu, Dapeng, Zhang, Yu
• Format: Journal Article
• Language: English
• Published: Changchun Jilin University and The Editorial Department of Chemical Research in Chinese Universities 01.08.2023; Springer Nature B.V
• Subjects: Analytical Chemistry; Catalytic activity; Cathodes; Cerium oxides; Chemical reduction; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Cycles; Discharge; Electrode materials; Graphene; Inorganic Chemistry; Metal air batteries; Nanoparticles; Organic Chemistry; Oxygen evolution reactions; Oxygen reduction reactions; Physical Chemistry; nanoparticle; Li-O; Reduced graphene oxide; battery; CeO; Cathode
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-023-3107-0

Li-O 2 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, CeO 2 nanoparticles(NPs) supported on reduced graphene oxide(rGO) have been prepared and employed as cathode. Compared with either CeO 2 NPs or rGO, CeO 2 /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 CeO 2 .