Sb2S3 embedded in amorphous P/C composite matrix as high-performance anode material for sodium ion batteries
- Authors
- Choi, Jeong-Hee; Ha, Choong-Wan; Choi, Hae-Young; Shin, Heon-Cheol; Park, Cheol-Min; Jo, Yong-Nam; Lee, Sang-Min
- Issue Date
- 20-Aug-2016
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Sb2S3; P/C composite matrix; mechano-chemical process; heat treatment; sodium ion battery
- Citation
- ELECTROCHIMICA ACTA, v.210, pp 588 - 595
- Pages
- 8
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 210
- Start Page
- 588
- End Page
- 595
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/22516
- DOI
- 10.1016/j.electacta.2016.05.190
- ISSN
- 0013-4686
1873-3859
- Abstract
- Sodium-ion battery is being regraded as an alternative to lithium-ion batteries in view of low-cost and high energy density. However, poor cycle life accompanying huge electrode swelling of existing metal based anode are the main issues to be solved. Sb2S3 embedded in amorphous phosphorus/carbon matrix is synthesized from P2S5, Sb, and carbon by using a facile mechano-chemical method and subsequent heat treatment, which is investigated on its potential as anode material for rechargeable sodium ion batteries. Several analytical tools including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron spectroscopy (TEM) reveal that as-synthesized composite is composed of Sb2S3 nano-crystallites (less than 10 nm) dispersed in robust phosphorus/carbon (P/C) composite matrix. Although Sb2S3 nano-domain converts to the Sb and S during sodiation, the recombination of Sb and S to form the original Sb2S3 phase is also confirmed by HR-TEM image of the subsequently desodiated electrode. This composite electrode exhibits superior electrochemical performances including a high reversible capacity of 654 mAh g (1) with well controlled electrode swelling of 62% at fully charged state, an excellent cycle stability with a capacity retention of 93.4% after 100th cycle at 50 mAg (1) for sodium ion batteries. Furthermore, even at a high current density of 2000 mA g (1) (3C rate), a desodiation capacity of 390 mAh g 1 is achieved. These outstanding electrochemical performances are attributed to the effective mechanical-buffering and electrical-conduction properties of the amorphous P/C composite matrix, which also prevent the aggregation of electroactive particles reacting with Na. (C) 2016 Elsevier Ltd. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.