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강석주

Kang, Seok Ju
Smart Materials for Energy Lab.
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Contorted Polycyclic Aromatic Hydrocarbons: Promising Organic Anodes for Alkali-ion Batteries

Author(s)
Kang, Seok Ju
Issued Date
2020-07-07
URI
https://scholarworks.unist.ac.kr/handle/201301/78452
Fulltext
http://new.kcsnet.or.kr/?mid=abstract_view&uid=53182&page=1&qpage=&word=34&wordfield=partnum&main_number=125
Citation
125th KCS General Meeting
Abstract
Enhancing the performance of carbon-based anode materials in Li-ion battery (LIB) systems is of considerable interest in terms of next-generation LIB host electrodes, because the unique reversible intercalation–de-intercalation process of such materials ultimately facilitates increases in LIB performance and longevity. This study explored the potential of a new class of carbon-based contorted hexabenzocoronene (c-HBC) as an anode material for high-performance LIB systems. The exploitation of the polymorphic crystalline nature of c-HBC resulted in successful development of a LIB anode based on a newly found crystal phase of trigonal R by solvent and subsequent thermal annealing. Our in-depth analysis based on cross-sectional transmission electron microscopy, grazing incidence X-ray diffraction, and computational investigation revealed further advantages of using contorted molecules in LIB systems. For instance, the resulting electrochemical characteristics using half-cell architecture clearly reflected single-stage Li insertion behavior associated with the large interspacing and short diffusion length of c-HBC molecule during the discharging process. In addition, the battery exhibited excellent rate capability and cycle endurance, highlighting the suitability of c-HBC as an anode material for high-performance LIBs.
Publisher
대한화학회

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