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강석주

Kang, Seok Ju
Smart Materials for Energy Lab.
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Strong interfacial energetics between catalysts and current collectors in aqueous sodium-air batteries

Author(s)
Baek, Myung-JinChoi, JieunWi, Tae-UngLim, Hyeong YongMyung, Min HoonLim, ChanoongSung, JinsuPark, Jeong-SunPark, Ju HyunShim, Yul HuiPark, JaehyunKang, Seok JuKim, YoungsikKim, So YounKwak, Sang KyuLee, Hyun-WookLee, Dong Woog
Issued Date
2022-03
DOI
10.1039/D2TA00329E
URI
https://scholarworks.unist.ac.kr/handle/201301/57362
Fulltext
https://pubs.rsc.org/en/content/articlelanding/2022/TA/D2TA00329E
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.10, no.9, pp.4601 - 4610
Abstract
Conventional binders, such as polyvinylidene fluoride, are not ideal candidates for aqueous sodium–air batteries (SABs) because of their relatively low adhesiveness, weak mechanical strength, and inherent hydrophobicity. The low adhesion strength often leads to electrocatalysts and carbon current collector detachments, followed by degradation of electrochemical performance over time. For SABs to possess excellent performance, development of advanced polymeric binders with high wettability and underwater adhesion is required. In this study, the adhesion stability of the electrocatalyst/current collector interface is significantly enhanced by using synthesized catechol-derivative hydrophilic binders, whereas catalyst desorption and carbon corrosion are effectively prevented. Using high-resolution transmission electron microscopy, we demonstrated the role of synthesized binders on the morphological stability of the composite electrode. Furthermore, surface forces apparatus and density functional theory calculations reveal insights into how polymeric binders impact the adhesion mechanism and battery performance of SAB based on their functional groups.
Publisher
ROYAL SOC CHEMISTRY
ISSN
2050-7488
Keyword
ADHESIVECATECHOLSURFACEELECTROLYTESADSORPTIONHYDROGELSPOLYMERSBINDER

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