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 | |
| Publication status | Published - Sep 10 2019 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Electrochemistry
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Preparation of MnO2-Cr2O3 mesoporous oxide and its application for an active and reversible air catalyst for Li-O2 batteries. / Ishihara, Tatsumi; Jang, Il Chan; Ida, Shintaro.
In: Electrochimica Acta, Vol. 317, 10.09.2019, p. 594-603.Research output: Contribution to journal › Article
}
TY - JOUR
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
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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U2 - 10.1016/j.electacta.2019.05.126
DO - 10.1016/j.electacta.2019.05.126
M3 - Article
AN - SCOPUS:85067654047
VL - 317
SP - 594
EP - 603
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -