Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 49, Pages 15984-15989Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201809205
Keywords
bond theory; electrocatalysts; Li-O-2 battery; nanostructures; surface anchoring
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Funding
- National Research Foundation of Korea (NRF) grant - Korea government (MSIP) [NRF-2017R1A2A1A17069463]
- National Research Foundation of Korea (NRF) grant - Korea government (MSIT) [NRF-2017R1A5A1015365]
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An effective chemical way to optimize the oxygen electrocatalyst and Li-O-2 electrode functionalities of metal oxide can be developed by the control of chemical bond nature with the surface anchoring of highly oxidized selenate (SeO42-) clusters. The bond competition between (Se6+-O) and (Mn-O) bonds is quite effective in stabilizing Jahn-Teller-active Mn3+ state and in increasing oxygen electron density of alpha-MnO2 nanowire (NW). The selenate-anchored alpha-MnO2 NW shows excellent oxygen electrocatalytic activity and electrode performance for Li-O-2 batteries, which is due to the improved charge transfer kinetics and reversible formation/decomposition of Li2O2. The present study underscores that the surface anchoring of highly oxidized cluster can provide a facile, effective way of improving the oxygen electrocatalyst and electrochemical performances of nanostructured metal oxide in Li-O-2 cells.
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