Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 29, Issue 49, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201904206
Keywords
carbon dioxide; cobalt; electrocatalysts; graphene oxide; Li-CO2 batteries
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Funding
- Australian Research Council (ARC) [FL170100154, DP160104866, DP170104464, LP160100927, DE170100928]
- Commonwealth of Australia through the Automotive Australia 2020 Cooperative Research Centre (Auto CRC)
- National Natural Science Foundation of China [21576202]
- Australian Government
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Li-CO2 batteries are an attractive technology for converting CO2 into energy. However, the decomposition of insulating Li2CO3 on the cathode during discharge is a barrier to practical application. Here, it is demonstrated that a high loading of single Co atoms (approximate to 5.3%) anchored on graphene oxide (adjacent Co/GO) acts as an efficient and durable electrocatalyst for Li-CO2 batteries. This targeted dispersion of atomic Co provides catalytically adjacent active sites to decompose Li2CO3. 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 Li2CO3 and maintains metallic-like nature after the adsorption of Li2CO3.
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