Preparation of MnO2-Cr2O3 mesoporous oxide and its application for an active and reversible air catalyst for Li-O2 batteries

Tatsumi Ishihara; Il Chan Jang; Shintaro Ida

doi:10.1016/j.electacta.2019.05.126

Preparation of MnO₂-Cr₂O₃ mesoporous oxide and its application for an active and reversible air catalyst for Li-O₂ batteries

Tatsumi Ishihara, Il Chan Jang, Shintaro Ida

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

4 Citations (Scopus)

Abstract

Preparation of highly porous MnO₂ and Cr₂O₃ with regular structure was investigated in this study by using hard template method. Cr₂O₃ nanoarchitects with regular pore structure and α-MnO₂ with porous nanosheet were successfully prepared. By mixing with single wall carbon nanotube (SWCNT), application of MnO₂, Cr₂O₃ nano architects (Mn-Cr oxides supported SWCNT) was studied as active air electrode for Li-O₂ battery which is now expecting as a new rechargeable battery with large capacity. It was found that the synergy effects between two mesoporous metal oxides with SWCNT resulted in excellent electrochemical properties of air electrode. Prepared Mn-Cr oxide supported SWCNT can sustain stable charge and discharge capacity up to 150 cycles with 500 mAh/g without capacity degradation indicating outstanding catalytic activity for oxygen reduction and evolution reaction (ORR/OER). Consecutive cyclic voltammetry tests also showed excellent reversibility of formation and decomposition of reaction products of Li₂O₂. This could be resulted from large pore volume and ordered structure of Cr₂O₃, MnO₂/SWCNT air electrode.

Original language	English
Pages (from-to)	594-603
Number of pages	10
Journal	Electrochimica Acta
Volume	317
DOIs	https://doi.org/10.1016/j.electacta.2019.05.126
Publication status	Published - Sep 10 2019

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Electrochemistry

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10.1016/j.electacta.2019.05.126

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title = "Preparation of MnO2-Cr2O3 mesoporous oxide and its application for an active and reversible air catalyst for Li-O2 batteries",

abstract = "Preparation of highly porous MnO2 and Cr2O3 with regular structure was investigated in this study by using hard template method. Cr2O3 nanoarchitects with regular pore structure and α-MnO2 with porous nanosheet were successfully prepared. By mixing with single wall carbon nanotube (SWCNT), application of MnO2, Cr2O3 nano architects (Mn-Cr oxides supported SWCNT) was studied as active air electrode for Li-O2 battery which is now expecting as a new rechargeable battery with large capacity. It was found that the synergy effects between two mesoporous metal oxides with SWCNT resulted in excellent electrochemical properties of air electrode. Prepared Mn-Cr oxide supported SWCNT can sustain stable charge and discharge capacity up to 150 cycles with 500 mAh/g without capacity degradation indicating outstanding catalytic activity for oxygen reduction and evolution reaction (ORR/OER). Consecutive cyclic voltammetry tests also showed excellent reversibility of formation and decomposition of reaction products of Li2O2. This could be resulted from large pore volume and ordered structure of Cr2O3, MnO2/SWCNT air electrode.",

author = "Tatsumi Ishihara and Jang, {Il Chan} and Shintaro Ida",

note = "Funding Information: This study was financially supported by a Grant-in-Aid for Specially Promoted Research (No. 16H06293 ) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) , Japan through the Japan Society for the Promotion of Science . The authors also acknowledged Dr. Shunsuke Asahina (JEOL Co. Ltd.) for high resolution SEM observation. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

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doi = "10.1016/j.electacta.2019.05.126",

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journal = "Electrochimica Acta",

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T1 - Preparation of MnO2-Cr2O3 mesoporous oxide and its application for an active and reversible air catalyst for Li-O2 batteries

AU - Ishihara, Tatsumi

AU - Jang, Il Chan

AU - Ida, Shintaro

N1 - Funding Information: This study was financially supported by a Grant-in-Aid for Specially Promoted Research (No. 16H06293 ) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) , Japan through the Japan Society for the Promotion of Science . The authors also acknowledged Dr. Shunsuke Asahina (JEOL Co. Ltd.) for high resolution SEM observation. Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/9/10

Y1 - 2019/9/10

N2 - Preparation of highly porous MnO2 and Cr2O3 with regular structure was investigated in this study by using hard template method. Cr2O3 nanoarchitects with regular pore structure and α-MnO2 with porous nanosheet were successfully prepared. By mixing with single wall carbon nanotube (SWCNT), application of MnO2, Cr2O3 nano architects (Mn-Cr oxides supported SWCNT) was studied as active air electrode for Li-O2 battery which is now expecting as a new rechargeable battery with large capacity. It was found that the synergy effects between two mesoporous metal oxides with SWCNT resulted in excellent electrochemical properties of air electrode. Prepared Mn-Cr oxide supported SWCNT can sustain stable charge and discharge capacity up to 150 cycles with 500 mAh/g without capacity degradation indicating outstanding catalytic activity for oxygen reduction and evolution reaction (ORR/OER). Consecutive cyclic voltammetry tests also showed excellent reversibility of formation and decomposition of reaction products of Li2O2. This could be resulted from large pore volume and ordered structure of Cr2O3, MnO2/SWCNT air electrode.

AB - Preparation of highly porous MnO2 and Cr2O3 with regular structure was investigated in this study by using hard template method. Cr2O3 nanoarchitects with regular pore structure and α-MnO2 with porous nanosheet were successfully prepared. By mixing with single wall carbon nanotube (SWCNT), application of MnO2, Cr2O3 nano architects (Mn-Cr oxides supported SWCNT) was studied as active air electrode for Li-O2 battery which is now expecting as a new rechargeable battery with large capacity. It was found that the synergy effects between two mesoporous metal oxides with SWCNT resulted in excellent electrochemical properties of air electrode. Prepared Mn-Cr oxide supported SWCNT can sustain stable charge and discharge capacity up to 150 cycles with 500 mAh/g without capacity degradation indicating outstanding catalytic activity for oxygen reduction and evolution reaction (ORR/OER). Consecutive cyclic voltammetry tests also showed excellent reversibility of formation and decomposition of reaction products of Li2O2. This could be resulted from large pore volume and ordered structure of Cr2O3, MnO2/SWCNT air electrode.

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Preparation of MnO₂-Cr₂O₃ mesoporous oxide and its application for an active and reversible air catalyst for Li-O₂ batteries

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