期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 16, 页码 13581-13587出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b02111
关键词
two-dimensional structure; SnS2; ternary nanocomposite; anode; Li-ion batteries
资金
- National Natural Science Foundation of China [51772249, 51521061]
- Hong Kong Scholars Program [XJ2017012]
- Program of Introducing Talents of Discipline to Universities [B08040]
- Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [123-QZ-2015]
- State Key Laboratory of Control and Simulation of Power System and Generation Equipment (Tsinghua University) [SKLD17KM02]
- Fundamental Research Funds for the Central Universities [G2017KY0308]
Two-dimensional (2D) SnS2 materials represent a class of high-capacity candidates as anodes of Li-ion batteries (LIBs); however, they are limited by inferior rate and cycling performance. Herein, we demonstrate unique triaxial nanocables of conducting polypyrrole@SnS2@carbon nanofiber (PPy@SnS2@CNF) prepared via a facile combination of hydrothermal method and vapor-phase polymerization. The PPy@SnS2@CNF manifests a strong synergistic effect from its hierarchical nanoarchitecture, which provides enlarged electrode/electrolyte contact interfaces, highly electrical conductive pathways, sufficient electrolyte ingress/transport channels, and an intimate mechanical/electrochemical safeguard for fast electrode kinetics and good structural stability. When evaluated as binder-free anodes of LIBs, the ternary nanocomposite delivers an ultrahigh reversible capacity of 1165 mAh g(-1) after 100 cycles and outstanding rate/cycling performance (880 mAh g(-1) at 2000 mA g(-1)), which are among the best results of the previously reported SnS2 electrodes. This work may pave a rational avenue of developing 2D materials with hierarchical structures for highly efficient energy-storage systems.
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