Multilayer hybrid nanosheet of mesoporous carbon−layered metal oxide as a highly efficient electrocatalyst for Li−O2 batteries

Yun Kyung Jo, Wilson Tamakloe, Xiaoyan Jin, Joohyun Lim, Sharad B. Patil, Yong Mook Kang, Seong Ju Hwang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An effective methodology to explore highly efficient oxygen electrocatalysts and electrodes for Li−O2 batteries is developed via intimate layer-by-layer hybridization between mesoporous carbon layer and highly anisotropic 2D metal oxide nanosheets. The obtained multilayer hybrid nanosheets of mesoporous carbon−layered MnO2 display outstanding functionalities as oxygen electrocatalysts with low overpotential and as the electrodes of Li−O2 batteries with huge discharge capacity of ˜7000 mAhg−1 at 200 mAg1 and improved cyclability. The excellent electrocatalyst/electrode bifunctionality of the present material is attributable to enhanced electron transfer kinetics, maximized active sites, promoted electrocatalysis kinetics, and stabilization of unstable Mn3+ species. This multilayer hybrid nanosheet structure is advantageous for facilitating reversible formation/decomposition of discharged product during cycling in Li−O2 batteries via promoted electrolyte−oxygen diffusion. The present study underscores that exfoliated metal oxide nanosheet can be used as an efficient immobilization matrix for synthesizing novel 2D multilayer hybrid nanosheets with synergistically-improved electrocatalyst/electrode functionalities.

Original languageEnglish
Pages (from-to)523-530
Number of pages8
JournalApplied Catalysis B: Environmental
Volume254
DOIs
Publication statusPublished - 2019 Oct 5

Fingerprint

Nanosheets
Electrocatalysts
Oxides
Multilayers
electrode
Metals
Electrodes
kinetics
oxygen
Oxygen
Electrocatalysis
Kinetics
immobilization
stabilization
decomposition
electron
Carbon
Stabilization
matrix
methodology

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

Cite this

Jo, Yun Kyung ; Tamakloe, Wilson ; Jin, Xiaoyan ; Lim, Joohyun ; Patil, Sharad B. ; Kang, Yong Mook ; Hwang, Seong Ju. / Multilayer hybrid nanosheet of mesoporous carbon−layered metal oxide as a highly efficient electrocatalyst for Li−O2 batteries. In: Applied Catalysis B: Environmental. 2019 ; Vol. 254. pp. 523-530.
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Multilayer hybrid nanosheet of mesoporous carbon−layered metal oxide as a highly efficient electrocatalyst for Li−O2 batteries. / Jo, Yun Kyung; Tamakloe, Wilson; Jin, Xiaoyan; Lim, Joohyun; Patil, Sharad B.; Kang, Yong Mook; Hwang, Seong Ju.

In: Applied Catalysis B: Environmental, Vol. 254, 05.10.2019, p. 523-530.

Research output: Contribution to journalArticle

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