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Park, Noejung
Computational Physics & Electronic Structure Lab
Research Interests
  • Electronic structure calculation, computational physics, computational material science

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Multilayer Graphynes for Lithium Ion Battery Anode

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Title
Multilayer Graphynes for Lithium Ion Battery Anode
Author
Hwang, Ho JunKoo, JahyunPark, MinwooPark, NoejungKwon, YongkyungLee, Hoonkyung
Keywords
Carbon atoms; First-principles density functional calculations; High-capacity; Large surface area; Lithium-ion battery anodes; Specific capacities; Volumetric capacity
Issue Date
201304
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.117, no.14, pp.6919 - 6923
Abstract
Graphynes, two-dimensional layers of sp- and sp(2)-bonded carbon atoms, have recently received considerable attention because of their potential as new Dirac materials. Here, focusing on their large surface area, we explore the applicability of graphynes as lithium ion battery anodes through the first-principles density functional calculations. We have found that Li potential energies are in the range suitable to be used as anodes. Furthermore, the maximum composite of Li-intercalated multilayer alpha- and gamma-graphynes is found to be C(6)Li3, which corresponds to a specific capacity of 1117 mAh g(-1), twice as large as the previous theoretical prediction for graphynes. The volumetric capacity of Li-intercalated multilayer alpha- and gamma-graphynes is 1364 and 1589 mAh cm(-3), respectively. Both specific and volumetric capacities of Li-intercalated graphynes are significantly larger than the corresponding value of graphite, from which we conclude that multilayer graphynes can serve as high-capacity lithium ion battery anodes.
URI
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DOI
http://dx.doi.org/10.1021/jp3105198
ISSN
1932-7447
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