期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 43, 页码 22593-22600出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta08858g
关键词
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资金
- National Natural Science Foundation of China [51774100, 51902108]
- Basic Ability Improvement Program for Young and Middle-Age Teachers of High School in Guangxi [2020KY02034]
- Guangxi Technology Base and Talent Subject [GUIKE AD20159015, 18126001]
- Guangxi Natural Science Foundation [2019GXNSFBA245099]
- Guangxi Innovation Driven Development Subject [GUIKE AA19182020, GUIKE AA19254004]
- Special Fund for Guangxi Distinguished Expert
Tin sulfide (SnS) has attracted much attention as an anode material for sodium ion batteries (SIBs) because of its various advantages, including high capacity and unique 2D structure. However, SnS has poor electrochemical performance caused by the large volume change and low intrinsic electric conductivity, which seriously limited its practical application in SIBs. Herein, we successfully constructed bimetallic sulfide SnS/MoS2 heterostructures decorating N, S co-doped carbon nanosheets (SnS/MoS2/NS-CNs) as anode materials for SIBs. The designed SnS/MoS2 heterostructures induce an electric field within the nanocrystals, which lead to lower ion-diffusion resistance and facilitate interfacial electron transport. Moreover, the N, S co-doped carbon nanosheets can buffer the volume change of SnS/MoS2, avoiding the direct contract between SnS/MoS2 and electrolyte, as well as favorable transport kinetics for electrons and ions. Accordingly, benefiting from these merits, the as-prepared SnS/MoS2/NS-CNs exhibit outstanding rate capability (372.9 mA h g(-1) at 5.0 A g(-1)) and long-term cycling performance (287.2 mA h g(-1) after 800 cycles at 1.0 A g(-1)).
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