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Investigation of Li-O2 Battery Performance Integrated with RuO2 Inverse Opal Cathodes in DMSO

Title
Investigation of Li-O2 Battery Performance Integrated with RuO2 Inverse Opal Cathodes in DMSO
Authors
Jang Y.J.Nguyen T.-T.H.Park H.Chae S.A.Cho S.A.Jang Y.H.An S.Han O.H.Kang K.Oh D.Kang S.J.Kim H.-C.Kim D.H.
Ewha Authors
김동하한옥희
SCOPUS Author ID
김동하scopus; 한옥희scopus
Issue Date
2019
Journal Title
ACS Applied Energy Materials
ISSN
2574-0962JCR Link
Citation
ACS Applied Energy Materials vol. 2, no. 7, pp. 5109 - 5115
Keywords
charge overpotentialsDEMSDMSOLi-O2 batteriesRuO2 inverse opals
Publisher
American Chemical Society
Indexed
SCOPUS scopus
Document Type
Article
Abstract
The development of electrocatalysts has emerged as an important aspect of rechargeable lithium-oxygen (Li-O2) batteries due to the fact that they facilitate the formation and decomposition of discharge products, leading to a higher capacity and cyclability. Herein, we demonstrate that ruthenium oxide (RuO2) inverse opal (IO), which possesses a three-dimensionally ordered porous network, has been developed and applied to the Li-O2 battery as a cathode. The RuO2 IO cathode contributes to the reduction of charge overpotential by up to ∼120 mV in lithium nitrate/dimethyl sulfoxide (LiNO3/DMSO), which corresponds to an ∼670 mV decrease as compared with that of a carbon cathode, Ketjen black (KB). Differential electrochemical mass spectrometer (DEMS) monitoring and magic angle spinning nuclear magnetic resonance (MAS NMR) measurement reveal the origin of the extremely low charge overpotential obtained from the RuO2 IO cathode by confirming the formation of lithium hydroxide (LiOH) as the main discharge product. The incorporation of RuO2 also remarkably reduces the formation of byproducts such as lithium carbonate (Li2CO3) by substantially lowering the charge overpotential. A mechanistic explanation of the device operation is provided in this study as well. © 2019 American Chemical Society.
DOI
10.1021/acsaem.9b00753
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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