View : 47 Download: 0

Ultra-fine SnO2 nanoparticles doubly embedded in amorphous carbon and reduced graphene oxide (rGO) for superior lithium storage

Title
Ultra-fine SnO2 nanoparticles doubly embedded in amorphous carbon and reduced graphene oxide (rGO) for superior lithium storage
Authors
Shah, Md. Selim Arif SherLee, JooyoungPark, A. ReumChoi, YoungjinKim, Woo-JaePark, JuhyunChung, Chan-HwaKim, JaeyunLim, ByungkwonYoo, Pil J.
Ewha Authors
김우재
Issue Date
2017
Journal Title
ELECTROCHIMICA ACTA
ISSN
0013-4686JCR Link

1873-3859JCR Link
Citation
ELECTROCHIMICA ACTA vol. 224, pp. 201 - 210
Keywords
SnO2 nanoparticlesgrapheneamorphous carbonanodeshigh capacity
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Indexed
SCI; SCIE; SCOPUS WOS
Document Type
Article
Abstract
SnO2 is a well-studied anode material for lithium ion batteries (LIBs). However, it undergoes severe capacity fading because of a large volume change (similar to 300%) during cycling. Composites of SnO2 with electro-conductive graphene would deliver improved capacity and rate performance. Nevertheless, achieving the theoretical capacity of SnO2 is still elusive, mainly because of disintegration of the active material from graphene and severe aggregation of SnO2, or Sn nanoparticles produced upon cycling. To surmount these limitations, in this work, nanocomposites containing ultra-fine sized SnO2 nanoparticles (UFSN) with reduced graphene oxide and amorphous carbon were synthesized in a single step at low temperature and environmentally benign way, in which ascorbic acid was employed as the carbon source and reducing agent. UFSN could decrease the lithium ion diffusion path length. As a result of effective buffering effect afforded by the mesoporous structure against volume change and improved lithium ion diffusivity, the ternary nanocomposite achieves ultra-high capacity of 1245 mAh g(-1), after 210 cycles at 100 mA g(-1) and excellent cycling stability. Since the proposed approach is facile, straightforward, and highly reproducible, it is anticipated that this system would be a potential alternative to the conventional graphite anode for LIBs. (C) 2016 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.electacta.2016.12.049
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE