Premium
MnCo 2 O 4 Nanowires Anchored on Reduced Graphene Oxide Sheets as Effective Bifunctional Catalysts for Li–O 2 Battery Cathodes
Author(s) -
Kim Jong Guk,
Kim Youngmin,
Noh Yuseong,
Kim Won Bae
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500123
Subject(s) - bifunctional , graphene , materials science , catalysis , cathode , oxide , polarization (electrochemistry) , nanowire , chemical engineering , battery (electricity) , composite number , nanotechnology , inorganic chemistry , composite material , chemistry , metallurgy , organic chemistry , power (physics) , physics , quantum mechanics , engineering
A hybrid composite system of MnCo 2 O 4 nanowires (MCO NWs) anchored on reduced graphene oxide (RGO) nanosheets was prepared as the bifunctional catalyst of a Li–O 2 battery cathode. The catalysts can be obtained from the hybridization of one‐dimensional MCO NWs and two‐dimensional RGO nanosheets. As O 2 ‐cathode catalysts for Li–O 2 cells, the MCO@RGO composites showed a high initial discharge capacity (ca. 11092.1 mAh g carbon −1 ) with a high rate performance. The Li–O 2 cells could run for more than 35 cycles with high reversibility under a limited specific capacity of 1000 mAh g carbon −1 with a low potential polarization of 1.36 V, as compared with those of pure Ketjenblack and MCO NWs. The high cycling stability, low potential polarization, and rate capability suggest that the MCO@RGO composites prepared here are promising catalyst candidates for highly reversible Li–O 2 battery cathodes.