期刊
SCIENCE CHINA-MATERIALS
卷 62, 期 1, 页码 74-86出版社
SCIENCE PRESS
DOI: 10.1007/s40843-018-9292-7
关键词
lithium-sulfur battery; sulfur cathode; nickel ferrite nanofibers; tap density; volumetric capacity
资金
- New Energy Project for Electric Vehicles in National Key Research and Development Program [2016YFB0100200]
- National Natural Science Foundation of China [21573114, 51502145]
Low volumetric energy density is a bottleneck for the application of lithium-sulfur (Li-S) battery. The low-density sulfur cooperated with the light-weight carbon substrate realizes electrochemical cycle stability, but leads to worse volumetric energy density. Here, nickel ferrite (NiFe2O4) nanofibers as novel substrate for sulfur not only anchor lithium polysulfides to enhance the cycle stability of sulfur cathode, but also contribute to the high volumetric capacity of the S/nickel ferrite composite. Specifically, the S/ nickel ferrite composite presents an initial volumetric capacity of 1,281.7 mA h cm(-composite)(-3) at 0.1 C rate, 1.9 times higher than that of S/carbon nanotubes, due to the high tap density of the S/nickel ferrite composite.
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