Anomalously High Lithium Storage in Three-Dimensional Graphene-like Ordered Microporous Carbon Electrodes

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Title
Anomalously High Lithium Storage in Three-Dimensional Graphene-like Ordered Microporous Carbon Electrodes
Author(s)
Yonghyun Kwon; Kyoungsoo Kim; Hongjun Park; Jae Won Shin; Ryong Ryoo
Publication Date
2018-03
Journal
Journal of Physical Chemistry C, v.122, no.9, pp.4955 - 4962
Publisher
AMER CHEMICAL SOC
Abstract
Zeolitelated carbon, having a three-dimensional graphene-like ordered microporous structure with high electrical conductivity, is a fascinating anode material for Li-ion batteries (LIBs). Herein, we report an extremely high Li capacity of 2950 mA h g-1 (equivalent to Li1.3/C), which is 7.9 times the maximum capacity of graphite, Li/C6. This is equivalent to the crowded packing of 20 Li+ per pore with 0.9 nm diameter. Approximately 59% of the capacity was reversible. According to the characterizations by electron energy loss spectroscopy, 7Li NMR, and 13C NMR, most of the Li species existed as Li+ within the carbon micropores. Contrary to the often-made assumption, only a small amount of solid-electrolyte interphase layers was detected at the external surface of the carbon particles but not inside the micropores. The anomalously high Li capacity is attributed to the extremely narrow pore environment, where Li+ would be difficult to be fully solvated. Tailoring of the carbon pores to a subnanometric range would therefore be exciting for future advancement of LIBs. © 2018 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4647
ISSN
1932-7447
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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