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원자제어 저차원 전자계 연구단
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Synergistic effect of a defect-free graphene nanostructure as an anode material for lithium ion batteries

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Title
Synergistic effect of a defect-free graphene nanostructure as an anode material for lithium ion batteries
Author(s)
Kwang Hyun Park; Kim B.G.; Song S.H.
Publication Date
2020-01
Journal
NANOMATERIALS, v.10, no.1, pp.9 -
Publisher
MDPI
Abstract
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.Graphene nanosheets have been among the most promising candidates for a highperformance anode material to replace graphite in lithium ion batteries (LIBs). Studies in this area have mainly focused on nanostructured electrodes synthesized by graphene oxide (GO) or reduced graphene oxide (rGO) and surface modifications by a chemical treatment. Herein, we propose a cost-effective and reliable route for generating a defect-free, nanoporous graphene nanostructure (df-GNS) through the sequential insertion of pyridine into a potassium graphite intercalation compound (K-GIC). The as-prepared df-GNS preserves the intrinsic property of graphene without any crystal damage, leading to micro-/nano-porosity (microporosity: ~10–50 µm, nanoporosity: ~2– 20 nm) with a significantly large specific surface area. The electrochemical performance of the dfGNS as an anode electrode was assessed and showed a notably enhanced capacity, rate capability, and cycle stability, without fading in capacity or decaying. This is because of the optimal porosity, with perfect preservation of the graphene crystal, allowing faster ion access and a high amount of electron pathways onto the electrode. Therefore, our work will be very helpful for the development of anode and cathode electrodes with higher energy and power performance requirements
URI
https://pr.ibs.re.kr/handle/8788114/7050
ISSN
2079-4991
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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2019_박광현_( 제1저자)nanomaterials_Synergistic effect of a defect-free graphene nanostructure as an anode material for lithium ion batteries.pdfDownload

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