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

doi:10.1016/j.apcatb.2019.05.025

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

23 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 mAg⁻¹ 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 language	English
Pages (from-to)	523-530
Number of pages	8
Journal	Applied Catalysis B: Environmental
Volume	254
DOIs	https://doi.org/10.1016/j.apcatb.2019.05.025
Publication status	Published - 2019 Oct 5

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2017R1A2A1A17069463, NRF-2017R1A2B3004383) and by the Korea government (MSIT) (NRF-2017R1A5A1015365). The experiments at PAL were supported in part by MOST and POSTECH.

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF- 2017R1A2A1A17069463 , NRF- 2017R1A2B3004383 ) and by the Korea government (MSIT) (NRF- 2017R1A5A1015365 ). The experiments at PAL were supported in part by MOST and POSTECH.

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Catalysis
Environmental Science(all)
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2019.05.025

Cite this

@article{49f5b0cadd394b5c9b27b5b4f75a48ab,

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

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 mAg−1 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.",

author = "Jo, {Yun Kyung} and Wilson Tamakloe and Xiaoyan Jin and Joohyun Lim and Patil, {Sharad B.} and Kang, {Yong Mook} and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2017R1A2A1A17069463, NRF-2017R1A2B3004383) and by the Korea government (MSIT) (NRF-2017R1A5A1015365). The experiments at PAL were supported in part by MOST and POSTECH. Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF- 2017R1A2A1A17069463 , NRF- 2017R1A2B3004383 ) and by the Korea government (MSIT) (NRF- 2017R1A5A1015365 ). The experiments at PAL were supported in part by MOST and POSTECH. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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doi = "10.1016/j.apcatb.2019.05.025",

language = "English",

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AU - Jo, Yun Kyung

AU - Tamakloe, Wilson

AU - Jin, Xiaoyan

AU - Lim, Joohyun

AU - Patil, Sharad B.

AU - Kang, Yong Mook

AU - Hwang, Seong Ju

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2017R1A2A1A17069463, NRF-2017R1A2B3004383) and by the Korea government (MSIT) (NRF-2017R1A5A1015365). The experiments at PAL were supported in part by MOST and POSTECH. Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF- 2017R1A2A1A17069463 , NRF- 2017R1A2B3004383 ) and by the Korea government (MSIT) (NRF- 2017R1A5A1015365 ). The experiments at PAL were supported in part by MOST and POSTECH. Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/10/5

Y1 - 2019/10/5

N2 - 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 mAg−1 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.

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