期刊
MATERIALS LETTERS
卷 167, 期 -, 页码 102-105出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.12.108
关键词
Sodium-ion batteries; Anode material; Bi2S3; Bi2S3@CNT
资金
- National Natural Science Foundation of China [U1401248, 21203134]
Bismuth sulfide (Bi2S3) has been considered a potential electrode material for Li storage due to its high theoretical capacity and intriguing reaction mechanism. In this work we have designed a Bi2S3@CNT nanocomposite as a sodium ion (Na-ion) battery anode material, and studied its electrochemical performance. The layer structured Bi2S3 provides host sites for insertion of Na-ion and the carbon nanotube (CNT) in the Bi2S3@CNT nanocomposite serves as a highly conducting network to promote electron transport. The results show that the Bi2S3@CNT nanocomposite exhibits a high and stable capacity in the 0.01-3 V (vs. Na/Nal voltage region, notably outperforming the bare Bi2S3 material. The Bi2S3@CNT nanocomposite as Na-ion anode material is able to discharge 84.4 mAh g(-1) capacity at 60 mA g(-1) over 60 full cycles. (C) 2015 Elsevier B.V. All rights reserved.
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