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Targeted Synergy between Adjacent Co Atoms on Graphene Oxide as an Efficient New Electrocatalyst for Li–CO 2 Batteries
Author(s) -
Zhang BinWei,
Jiao Yan,
Chao DongLiang,
Ye Chao,
Wang YunXiao,
Davey Kenneth,
Liu HuaKun,
Dou ShiXue,
Qiao ShiZhang
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201904206
Subject(s) - electrocatalyst , materials science , graphene , oxide , decomposition , cathode , chemical engineering , nanotechnology , metal , adsorption , electrode , electrochemistry , chemistry , metallurgy , organic chemistry , engineering
Li–CO 2 batteries are an attractive technology for converting CO 2 into energy. However, the decomposition of insulating Li 2 CO 3 on the cathode during discharge is a barrier to practical application. Here, it is demonstrated that a high loading of single Co atoms (≈5.3%) anchored on graphene oxide (adjacent Co/GO) acts as an efficient and durable electrocatalyst for Li–CO 2 batteries. This targeted dispersion of atomic Co provides catalytically adjacent active sites to decompose Li 2 CO 3 . The adjacent Co/GO exhibits a highly significant sustained discharge capacity of 17 358 mA h g −1 at 100 mA g −1 for >100 cycles. Density functional theory simulations confirm that the adjacent Co electrocatalyst possesses the best performance toward the decomposition of Li 2 CO 3 and maintains metallic‐like nature after the adsorption of Li 2 CO 3 .