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Crumpled graphene paper for high power sodium battery anode

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Title
Crumpled graphene paper for high power sodium battery anode
Author(s)
Yun, YS; Park, YU; Chang, SJ; Kim, BH; Choi, J; Wang, JJ; Zhang, D; Braun, PV; Jin, HJ; Kisuk Kang
Publication Date
2016-04
Journal
CARBON, v.99, no., pp.658 - 664
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Graphene-based electrodes typically form a compact uniaxially oriented stacked structure during electrode preparation due to the highly anisotropic morphology. This leads to limited diffusion paths for the insertion of Li or Na when used as electrodes in rechargeable batteries. Here, we demonstrate that self-standing electrodes formed of randomly folded and/or crumpled graphene nanosheets can be obtained via a simple modified reduction process, and that the crumpled structure can significantly increase the power capability of graphene-based anodes of sodium-ion batteries. These electrodes can deliver a power density of approximately 20,000 W kg(-1), which surpasses the Li storage capability of conventional graphene paper electrodes. Moreover, the specific capacity was stably maintained without a binder, conductive agent, or substrate for more than 500 charge/discharge cycles and 1000 cycles of repeated bending. (C) 2015 Elsevier Ltd. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/3303
ISSN
0008-6223
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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