α-MnO 2 Nanowire-Anchored Highly Oxidized Cluster as a Catalyst for Li-O 2 Batteries: Superior Electrocatalytic Activity and High Functionality

An effective chemical way to optimize the oxygen electrocatalyst and Li-O electrode functionalities of metal oxide can be developed by the control of chemical bond nature with the surface anchoring of highly oxidized selenate (SeO ) clusters. The bond competition between (Se -O) and (Mn-O) bonds is...

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Published inAngewandte Chemie International Edition Vol. 57; no. 49; pp. 15984 - 15989
Main Authors Gu, Tae-Ha, Agyeman, Daniel Adjei, Shin, Seung-Jae, Jin, Xiaoyan, Lee, Jang Mee, Kim, Hyungjun, Kang, Yong-Mook, Hwang, Seong-Ju
Format Journal Article
LanguageEnglish
Published Germany 03.12.2018
Subjects
electrocatalysts
Li-O2 battery
surface anchoring
nanostructures
bond theory
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Summary:An effective chemical way to optimize the oxygen electrocatalyst and Li-O electrode functionalities of metal oxide can be developed by the control of chemical bond nature with the surface anchoring of highly oxidized selenate (SeO ) clusters. The bond competition between (Se -O) and (Mn-O) bonds is quite effective in stabilizing Jahn-Teller-active Mn state and in increasing oxygen electron density of α-MnO nanowire (NW). The selenate-anchored α-MnO NW shows excellent oxygen electrocatalytic activity and electrode performance for Li-O batteries, which is due to the improved charge transfer kinetics and reversible formation/decomposition of Li O . 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 cells.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201809205