期刊
NANO LETTERS
卷 22, 期 3, 页码 1217-1224出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c04380
关键词
Cotton; Vapor-liquid-solid; Solid-liquid-solid; Multiwalled carbon nanotubes; Energy storage; Lithium-sulfur battery
类别
资金
- U.S. National Science Foundation [CMMI-1728042]
Fabrication processes of carbon nanomaterials derived from fossil fuels have high carbon emissions. This study proposes a low-cost and sustainable approach to produce multiwalled carbon nanotubes (MWCNTs) from cotton, a abundant biomass material. The MWCNTs show enhanced stability and performance when used in a lithium-sulfur battery.
Fabrication processes of fossil fuel-derived carbon nanomaterials are of high carbon emissions. Deriving carbon materials from low-cost and sustainable biomass is eco-friendly. Cotton, one of the most abundant biomass materials, naturally holds a hierarchically porous structure, making the activated cotton textile (ACT) an ideal scaffold for loading active materials. Here, we report a low-cost approach to massively producing multiwalled carbon nanotubes (MWCNTs) via a combination process of vaporliquid-solid (VLS) and solid-liquid-solid (SLS) where cotton decomposed into carbon-containing gases and amorphous carbons that then dissolved into Fe nanoparticles, forming Fe/Fe3C-encapsulated MWCNTs. The lithium-sulfur (Li-S) battery constructed by the Fe/Fe3C-MWCNT@ACT/S composite (as the cathode) and the Fe/Fe3C-MWCNT@ACT (as the interlayer) exhibited a superlative cycling stability (over 1000 cycles at 1.0 C), an ultralow capacity decay rate (0.0496% per cycle) and a remarkable specific capacity (1273 mAh g(-1) at 0.1 C). The Fe/Fe3C-MWCNTs enhanced electrode stability and suppressed polysulfide dissolution during cycling.
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