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α‐MnO 2 Nanowire‐Anchored Highly Oxidized Cluster as a Catalyst for Li‐O 2 Batteries: Superior Electrocatalytic Activity and High Functionality
Author(s) -
Gu TaeHa,
Agyeman Daniel Adjei,
Shin SeungJae,
Jin Xiaoyan,
Lee Jang Mee,
Kim Hyungjun,
Kang YongMook,
Hwang SeongJu
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201809205
Subject(s) - electrocatalyst , electrochemistry , catalysis , oxide , oxygen evolution , nanowire , materials science , electrode , oxygen , inorganic chemistry , cluster (spacecraft) , chemical engineering , chemistry , nanotechnology , biochemistry , organic chemistry , engineering , metallurgy , computer science , programming language
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 (SeO 4 2− ) clusters. The bond competition between (Se 6+ −O) and (Mn−O) bonds is quite effective in stabilizing Jahn–Teller‐active Mn 3+ state and in increasing oxygen electron density of α‐MnO 2 nanowire (NW). The selenate‐anchored α‐MnO 2 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 Li 2 O 2 . 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.