共 37 条
SnTe-TiC-C composites as high-performance anodes for Li-ion batteries
被引:29
作者:
Son, Seung Yeon
[1
]
Hur, Jaehyun
[1
]
Kim, Kwang Ho
[2
,3
]
Son, Hyung Bin
[4
]
Lee, Seung Geol
[5
]
Kim, Il Tae
[1
]
机构:
[1] Gachon Univ, Dept Chem & Biol Engn, Seongnam Si 13120, Gyeonggi Do, South Korea
[2] Pusan Natl Univ, Global Frontier R&D Ctr Hybrid Interface Mat, 6F,Hyowon Ind Univ Cooperat Bldg 2, Busan 46241, South Korea
[3] Pusan Natl Univ, Sch Mat Sci & Engn, 2,Busandaehak Ro 63beon Gil, Busan 46241, South Korea
[4] Chung Ang Univ, Sch Integrat Engn, Seoul 06974, South Korea
[5] Pusan Natl Univ, Dept Organ Mat Sci & Engn, 2,Busandaehak Ro 63 Beon Gil, Busan 46241, South Korea
基金:
新加坡国家研究基金会;
关键词:
Tin-telluride;
Titanium carbide;
High-energy ball milling;
Composite anode;
Hybrid matrix;
Li-ion batteries;
ALLOY ANODES;
ELECTROCHEMICAL PERFORMANCE;
NEGATIVE ELECTRODES;
BEHAVIOR;
SILICON;
D O I:
10.1016/j.jpowsour.2017.08.105
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
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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页码:372 / 379
页数:8
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