α-MnO2 Nanowire-Anchored Highly Oxidized Cluster as a Catalyst for Li-O2 Batteries: Superior Electrocatalytic Activity and High Functionality

Tae Ha Gu, Daniel Adjei Agyeman, Seung Jae Shin, Xiaoyan Jin, Jang Mee Lee, Hyungjun Kim, Yong Mook Kang, Seong Ju Hwang

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 (SeO4 2−) 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.

Original languageEnglish
Pages (from-to)15984-15989
Number of pages6
JournalAngewandte Chemie - International Edition
Volume57
Issue number49
DOIs
Publication statusPublished - 2018 Dec 3

Fingerprint

Nanowires
Selenic Acid
Oxygen
Catalysts
Electrocatalysts
Oxides
Metals
Electrodes
Chemical bonds
Carrier concentration
Charge transfer
Decomposition
Kinetics

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Gu, Tae Ha ; Agyeman, Daniel Adjei ; Shin, Seung Jae ; Jin, Xiaoyan ; Lee, Jang Mee ; Kim, Hyungjun ; Kang, Yong Mook ; Hwang, Seong Ju. / α-MnO2 Nanowire-Anchored Highly Oxidized Cluster as a Catalyst for Li-O2 Batteries : Superior Electrocatalytic Activity and High Functionality. In: Angewandte Chemie - International Edition. 2018 ; Vol. 57, No. 49. pp. 15984-15989.
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α-MnO2 Nanowire-Anchored Highly Oxidized Cluster as a Catalyst for Li-O2 Batteries : Superior Electrocatalytic Activity and High Functionality. / Gu, Tae Ha; Agyeman, Daniel Adjei; Shin, Seung Jae; Jin, Xiaoyan; Lee, Jang Mee; Kim, Hyungjun; Kang, Yong Mook; Hwang, Seong Ju.

In: Angewandte Chemie - International Edition, Vol. 57, No. 49, 03.12.2018, p. 15984-15989.

Research output: Contribution to journalArticle

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AU - Gu, Tae Ha

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AU - Shin, Seung Jae

AU - Jin, Xiaoyan

AU - Lee, Jang Mee

AU - Kim, Hyungjun

AU - Kang, Yong Mook

AU - Hwang, Seong Ju

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