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원자제어 저차원 전자계 연구단
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Nanoporous NiO plates with a unique role for promoted oxidation of carbonate and carboxylate species in the Li-O2 battery

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Title
Nanoporous NiO plates with a unique role for promoted oxidation of carbonate and carboxylate species in the Li-O2 battery
Author(s)
Misun Hong; Hee Cheul Choi; Hye Ryung Byon
Publication Date
2015-03
Journal
CHEMISTRY OF MATERIALS, v.27, no.6, pp.2234 - 2241
Publisher
AMER CHEMICAL SOC
Abstract
We report a novel catalytic reaction to promote oxidation of carbonate and carboxylate species using nanoporous nickel oxide (NiO) in the lithium-oxygen (Li-O2) battery. These nanoporous NiO catalysts in the shape of two-dimensional (2-D) hexagonal plates are incorporated on the carbon nanotube (CNT) electrode, which remarkably enhances oxidation efficiency of carbonate and carboxylate species as representative side products in Li-O2 electrochemistry and greatly improves the cycleability to more than 70 cycles. The oxidation reaction predominantly occurs at the nanoporous NiO, toward which the carbonate and carboxylate species may migrate for the complete decomposition. This result is notably distinguished from a NiO-free CNT electrode, where such a passivation layer becomes thicker and precludes electron transfer, thus inducing poor cyclability. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/1684
ISSN
0897-4756
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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