期刊
NANOMATERIALS
卷 9, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/nano9091323
关键词
Amorphous Sb2S3; CNT nanocomposites; High capacity; Anode; Na-ion batteries; K-ion batteries
类别
资金
- National Natural Science Foundation of China [51661009]
- Natural Science Foundation of Guangxi Province [2016GXNSFGA380001]
- key project of Guangxi Key Laboratory of Information Materials [171006-Z]
Antimony sulfide (Sb2S3) with a high theoretical capacity is considered as a promising candidate for Na-ion batteries (NIBs) and K-ion batteries (KIBs). However, its poor electrochemical activity and structural stability are the main issues to be solved. Herein, amorphous Sb2S3 nanospheres/carbon nanotube (Sb2S3/CNT) nanocomposites are successfully synthesized via one step self-assembly method. In-situ growth of amorphous Sb2S3 nanospheres on the CNTs is confirmed by X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. The amorphous Sb2S3/CNT nanocomposites as an anode for NIBs exhibit excellent electrochemical performance, delivering a high charge capacity of 870 mA h g(-1) at 100 mA g(-1), with an initial coulomb efficiency of 77.8%. Even at 3000 mA g(-1), a charge capacity of 474 mA h g(-1) can be achieved. As an anode for KIBs, the amorphous Sb2S3/CNT nanocomposites also demonstrate a high charge capacity of 451 mA h g(-1) at 25 mA g(-1). The remarkable performance of the amorphous Sb2S3/CNT nanocomposites is attributed to the synergic effects of the amorphous Sb2S3 nanospheres and 3D porous conductive network constructed by the CNTs.
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