Journal
SCIENCE CHINA-MATERIALS
Volume 65, Issue 6, Pages 1443-1452Publisher
SCIENCE PRESS
DOI: 10.1007/s40843-021-1931-0
Keywords
Sb2S3/SnS2/C heterostructures; anode; electrolyte; sodium-ion battery
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Funding
- National Natural Science Foundation of China [51972025]
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Metal sulfides are promising anode materials for sodium-ion batteries due to their high theoretical capacities. This study fabricated Sb2S3/SnS2/C heterostructures with enhanced material stability and improved ion and electron transport. The heterostructures exhibited high reversible capacity and good rate performance, making them promising anode materials for SIBs.
Metal sulfides are promising anode materials for sodium-ion batteries (SIBs) because of their high theoretical capacities. However, they are usually limited by their poor cycling performance and rate properties due to their large volume expansion and sluggish reaction kinetics. Herein, Sb2S3/SnS2/C heterostructures were fabricated by directly growing SnS2 nanoplates on Sb2S3 nanorods and then coating their surface with a carbon layer. Sodium-ion diffusion in several electrodes and different electrolytes was further evaluated to investigate the electrochemical performance of the heterostructures. Results revealed that the heterostructures greatly enhanced material stability and promoted ion and electron transport. Consequently, the Sb2S3/SnS2/C composites displayed a high reversible capacity of 642 mA h g(-1) at a current density of 1 A g(-1) after 600 cycles and a good rate performance of 367.3 mA h g(-1) at 4 A g(-1) in a NaPF6-diglyme electrolyte. Therefore, Sb2S3/SnS2/C heterostructures are promising anode materials for SIBs.
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