Affiliation:
1. Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology School of Materials Science and Engineering Yanshan University Qinhuangdao 066004 P. R. China
2. College of Mechanical and Electrical Engineering Guangdong University of Science and Technology Dongguan 523000 P. R. China
3. State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province School of Science Yanshan University Qinhuangdao 066004 China
Abstract
SnS2 is considered to be an ideal replacement material for graphite anodes, and has attracted much attention from scientific researchers due to its high theoretical capacity and low cost. However, the application of SnS2 is restricted by its low electrical conductivity and severe volume expansion during cycle. Herein, SnS2/C/CNT material is obtained by high temperature vulcanization and solvent heat treatment with Sn metal–organic framework (MOF) as precursor, while the carbon skeleton of the MOF is preserved. The carbon nanotubes(CNTs) are evenly distributed across the MOF‐derived C frameworks to create a carbon network that improves the electrical conductivity of SnS2 and inhibits its volume expansion. Therefore, the modified SnS2/C/CNT anode has still maintained a high discharge capacity of 954.2 mAh g−1 after 100 cycles at the current density of 200 mA g−1 with a high capacity retention rate of 89.3%. It also exhibits excellent rate capability (739.8, 669.1, and 575.8 mAh g−1 for 0.5, 1, and 2 A g−1). In addition, the SnS2/C/CNT material also shows good electrochemical performance even without conductive additives.
Funder
National Natural Science Foundation of China
Cited by
1 articles.
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