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Hong, Sung You
Synthetic Organic Chemistry Laboratory
Research Interests
  • Synthetic organic chemistry, transition metals, oxidation state

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Carbothermal shock-induced bifunctional Pt-Co alloy electrocatalysts for high-performance seawater batteries

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Title
Carbothermal shock-induced bifunctional Pt-Co alloy electrocatalysts for high-performance seawater batteries
Author
Ryu, Jong HunPark, JaehyunPark, JeongwooMun, JinhongIm, EunmiLee, HojeongHong, Sung YouAn, KwangjinLee, GeunsikKim, YoungsikJo, Pil SungKang, Seok Ju
Issue Date
2022-03
Publisher
Elsevier BV
Citation
ENERGY STORAGE MATERIALS, v.45, pp.281 - 290
Abstract
Seawater batteries consisting of Na anode, Na super-ionic conductor separators, and seawater catholytes have received wide attention because of their theoretical specific capacity of 1160 mAh g−1 and cost-effective Na anode in comparison to rare-earth Li. However, large overpotential during charge and discharge caused by parasitic reactions limits their practical applications. In this work, we employ the bifunctional Pt-Co alloy electrocatalysts produced by carbothermal shock (CTS) method to improve the oxygen evolution and reduction reaction activities of seawater batteries. The CTS induced Pt-Co alloy nanoparticles are well synthesized and dispersed on a carbon current collector within a few s, resulting in improved overpotential and cycle endurance of seawater batteries compared to pristine carbon cathode. In particular, the cell can operate for over 500 h in a seawater catholyte at a fixed capacity of 0.25 mA cm−2 without significant performance degradation. Furthermore, CTS can be readily applied to large-area prismatic seawater battery cells. We observe excellent cyclability in a large-scale seawater battery, suggesting that bifunctional Pt-Co alloy electrocatalysts produced by CTS are viable for use in seawater batteries.
URI
https://scholarworks.unist.ac.kr/handle/201301/54997
URL
https://www.sciencedirect.com/science/article/pii/S2405829721005535
DOI
10.1016/j.ensm.2021.11.036
ISSN
2405-8297
Appears in Collections:
CHM_Journal Papers
ECHE_Journal Papers
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