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- Title
α‐MnO<sub>2</sub> Nanowire‐Anchored Highly Oxidized Cluster as a Catalyst for Li‐O<sub>2</sub> Batteries: Superior Electrocatalytic Activity and High Functionality.
- Authors
Gu, Tae‐Ha; Agyeman, Daniel Adjei; Shin, Seung‐Jae; Jin, Xiaoyan; Lee, Jang Mee; Kim, Hyungjun; Kang, Yong‐Mook; Hwang, Seong‐Ju
- Abstract
An effective chemical way to optimize the oxygen electrocatalyst and Li‐O2 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 α‐MnO2 nanowire (NW). The selenate‐anchored α‐MnO2 NW shows excellent oxygen electrocatalytic activity and electrode performance for Li‐O2 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‐O2 cells.
- Subjects
OXYGEN compounds; ELECTROCATALYSTS; ELECTRON density; CHARGE transfer; COLLISIONS (Nuclear physics)
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 49, p16216
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201809205