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Issue 26, 2018
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Contorted polycyclic aromatic hydrocarbon: promising Li insertion organic anode

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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[3 with combining macron] 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.

Graphical abstract: Contorted polycyclic aromatic hydrocarbon: promising Li insertion organic anode

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Supplementary files

Article information


Submitted
20 Apr 2018
Accepted
12 Jun 2018
First published
12 Jun 2018

J. Mater. Chem. A, 2018,6, 12589-12597
Article type
Paper

Contorted polycyclic aromatic hydrocarbon: promising Li insertion organic anode

J. Park, C. W. Lee, S. H. Joo, J. H. Park, C. Hwang, H. Song, Y. S. Park, S. K. Kwak, S. Ahn and S. J. Kang, J. Mater. Chem. A, 2018, 6, 12589
DOI: 10.1039/C8TA03633K

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