Soft-templated synthesis of core-shell heterostructured NiS@polypyrrole nanotube aerogels as anode materials for high-performance lithium ion batteries
New Journal of Chemistry, ISSN: 1369-9261, Vol: 45, Issue: 29, Page: 13127-13136
2021
- 11Citations
- 8Captures
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Article Description
Building additional functionality into self-assembled conductive polymer nanotubes with high electrical conductivity, fast charge/discharge capability, and high mechanical strength is of great interest for energy storage materials and applications. Well-defined core-shell heterostructured NiS@polypyrrole (NiS@PPy) nanotube aerogels, hollow polypyrrole nanotubes wrapped by uniform NiSlayers, were fabricatedviaa facile two-step process, chemical oxidative polymerization assisted by a lithocholic acid soft-template and a biomolecule-assisted hydrothermal process. With the unique core-shell nanotube network structure, the PPy nanotubes would offer the largest surface area, short paths for Lidiffusion and numerous active sites, while the PPy nanotube matrix would prefer fast charge transportation and buffer the volume change of NiSduring lithiation/delithiation processes. When directly used as an anode material for lithium-ion batteries, the as-prepared core-shell heterostructured NiS@PPy nanotube aerogel electrode exhibits high reversible capacity, good rate capability, and improved cycling stability. A reversible capacity of 645.4 mA h gis sustained at a current density of 100 mA gafter 1000 cycles, showing better cycling stability than the NiSpowder pasted electrode. The low densities, large surface areas, and three-dimensional network features of the resulting NiS@PPy nanotube aerogels render them attractive for potential energy conversion/storage devices.
Bibliographic Details
Royal Society of Chemistry (RSC)
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