SnTe-TiC-C composites as high-performance anodes for Li-ion batteries
- Authors
- Son, Seung Yeon; Hur, Jaehyun; Kim, Kwang Ho; Son, Hyung Bin; Lee, Seung Geol; Kim, Il Tae
- Issue Date
- Oct-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Tin-telluride; Titanium carbide; High-energy ball milling; Composite anode; Hybrid matrix; Li-ion batteries
- Citation
- JOURNAL OF POWER SOURCES, v.365, pp 372 - 379
- Pages
- 8
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 365
- Start Page
- 372
- End Page
- 379
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3777
- DOI
- 10.1016/j.jpowsour.2017.08.105
- ISSN
- 0378-7753
1873-2755
- Abstract
- Intermetallic SnTe composites dispersed in a conductive TiC/C hybrid matrix are synthesized by high-energy ball milling (HEBM). The electrochemical performances of the composites as potential anodes for Li-ion batteries are evaluated. The structural and morphological characteristics of the SnTe-TiC-C composites with various TiC contents are investigated by X-ray diffraction (XRD) and high-resolution transmission electron microscopy, which reveal that SnTe and TiC are uniformly dispersed in a carbon matrix. The electrochemical performance is significantly improved by introducing TiC to the SnTe-C composite; higher TiC contents result in better performances. Among the prepared composites, the SnTe -TiC (30%)-C and SnTe-TiC (40%)-C electrodes exhibit the best electrochemical performance, showing the reversible capacities of, respectively, 652 mAh cm(-3) and 588 mAh cm(-3) after 400 cycles and high rate capabilities with the capacity retentions of 75.4% for SnTe-TiC (30%)-C and 82.2% for SnTe-TiC (40%)-C at 10 A g(-1). Furthermore, the Li storage reaction mechanisms of Te or Sn in the SnTe-TiC-C electrodes are confirmed by ex situ XRD. (C) 2017 Elsevier B.V. All rights reserved.
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