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Rodney S. Ruoff
다차원 탄소재료 연구단
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In Situ Activation of Nitrogen-Doped Graphene Anchored on Graphite Foam for a High-Capacity Anode

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Title
In Situ Activation of Nitrogen-Doped Graphene Anchored on Graphite Foam for a High-Capacity Anode
Author(s)
Junyi Ji; Jilei Liu; Linfei Lai; Xin Zhao; Yongda Zhen; Jianyi Lin; Yanwu Zhu; Hengxing Ji; Li Li Zhang; Rodney S. Ruoff
Publication Date
2015-08
Journal
ACS NANO, v.9, no.8, pp.8609 - 8616
Publisher
AMER CHEMICAL SOC
Abstract
We report the fabrication of a three-dimensional free-standing nitrogen-doped porous graphene/graphite foam by in situ activation of nitrogen-doped graphene on highly conductive graphite foam (GF). After in situ activation, intimate sheet contact was observed between the graphene sheets and the GF. The sheet contact produced by in situ activation is found to be superior to the point contact obtained by the traditional drop-casting method and facilitates electron transfer. Due to the intimate contact as well as the use of an ultralight GF current collector, the composite electrode delivers a gravimetric capacity of 642 mAh g-1 and a volumetric capacity of 602 mAh cm-3 with respect to the whole electrode mass and volume (including the active materials and the GF current collector). When normalized based on the mass of the active material, the composite electrode delivers a high specific capacity of up to 1687 mAh g-1, which is superior to that of most graphene-based electrodes. Also, after ∼90 s charging, the anode delivers a capacity of about 100 mAh g-1 (with respect to the total mass of the electrode), indicating its potential use in high-rate lithium-ion batteries. (Graph Presented). © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/1921
ISSN
1936-0851
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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