Contorted polycyclic aromatic hydrocarbon:promising Li insertion organic anode

Contorted polycyclic aromatic hydrocarbon:promising Li insertion organic anode
안석훈이철우Jaehyun ParkSe Hun JooJu Hyun ParkChihyun HwangHyun-Kon SongYoung Seok ParkSang Kyu KwakSeok Ju Kang
Issue Date
Journal of materials chemistry. A, Materials for energy and sustainability
VOL 6, NO 26-12597
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 R3 by solvent and subsequent thermal annealing. Our indepth 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 highperformance LIBs.
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