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Kim, Guntae
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Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM

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Co3O4 Exsolved Defective Layered Perovskite Oxide for Energy Storage Systems

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Title
Co3O4 Exsolved Defective Layered Perovskite Oxide for Energy Storage Systems
Author
Kang, Kyeong-NamLee, HansolKim, JunyoungKwak, Myung-JunJeong, Hu YoungKim, GuntaeJang, Ji-Hyun
Issue Date
2020-12
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v.5, no.12, pp.3828 - 3836
Abstract
We report a Co3O4 exsolved perovskite oxide PrBaMn1.7Co0.3O5+delta (Co3O4-PBMCO) that utilizes the Faradaic transfer of metal oxide and favorable OH- adsorption for an energy storage mechanism, as an active material for hybrid supercapacitors. It demonstrated electrochemical performances supported by both fast oxygen anion intercalation in the interior and Faradaic redox reaction on the surface of the active material, Co3O4-PBMCO. The flexible hybrid supercapacitor, Co3O4-PBMCO, coated onto the three-dimensional nickel wire (3D-Ni), exhibited outstanding capacitance (capacity) of 1571 F g(-1) (218.54 mAh g(-1)), good rate capability, and cycle stability. With these performances, the hybrid device exhibited a high energy density of 215.80 Wh kg(-1) and a power density of 1.48 kW kg(-1), which are significantly higher than those of previously reported perovskite oxide-based electrodes. These results verified that our unique metal oxide exsolved layered perovskite oxide is a promising candidate as an active material for hybrid devices that can be widely applied for smart wearable and implantable devices.
URI
https://scholarworks.unist.ac.kr/handle/201301/48190
URL
https://pubs.acs.org/doi/10.1021/acsenergylett.0c01779
DOI
10.1021/acsenergylett.0c01779 489
ISSN
2380-8195
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