File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

송현곤

Song, Hyun-Kon
eclat: electrochemistry lab of advanced technology
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Folding Graphene Film Yields High Areal Energy Storage in Lithium-Ion Batteries

Author(s)
Wang, BinRyu, JaegeonChoi, SunghoSong, GyujinHong, DongkiHwang, ChihyunChen, XiongWang, BoLi, WeiSong, Hyun-KonPark, SoojinRuoff, Rodney S.
Issued Date
2018-02
DOI
10.1021/acsnano.7b08489
URI
https://scholarworks.unist.ac.kr/handle/201301/23906
Fulltext
https://pubs.acs.org/doi/10.1021/acsnano.7b08489
Citation
ACS NANO, v.12, no.2, pp.1739 - 1746
Abstract
We show that a high energy density can be achieved in a practical manner with freestanding electrodes without using conductive carbon, binders, and current collectors. We made and used a folded graphene composite electrode designed for a high areal capacity anode. The traditional thick graphene composite electrode, such as made by filtering graphene oxide to create a thin film and reducing it such as through chemical or thermal methods, has sluggish reaction kinetics. Instead, we have made and tested a thin composite film electrode that was folded several times using a water-assisted method; it provides a continuous electron transport path in the fold regions and introduces more channels between the folded layers, which significantly enhances the electron/ion transport kinetics. A fold electrode consisting of SnO2/graphene with high areal loading of 5 mg cm-2 has a high areal capacity of 4.15 mAh cm-2, well above commercial graphite anodes (2.50-3.50 mAh cm-2), while the thickness is maintained as low as ∼20 μm. The fold electrode shows stable cycling over 500 cycles at 1.70 mA cm-2 and improved rate capability compared to thick electrodes with the same mass loading but without folds. A full cell of fold electrode coupled with LiCoO2 cathode was assembled and delivered an areal capacity of 2.84 mAh cm-2 after 300 cycles. This folding strategy can be extended to other electrode materials and rechargeable batteries.
Publisher
AMER CHEMICAL SOC
ISSN
1936-0851
Keyword (Author)
foldinggraphene composite filmshigh areal capacityhigh mass loadinglithium-ion batteries
Keyword
FREE ANODECAPACITYPAPEROXIDENANOCOMPOSITESPERFORMANCEELECTRODESSTABILITYCOMPOSITEAEROGELS

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.