3D catalytic MOF-based nanocomposite as separator coatings for high-performance Li-S battery
By Chun-Lei Song, Liao Guohui, Yan Yang, Xu-Jia Hong, Sing-Lin Huang, Qi-Feng Zheng, Liping Si, Min Zhang, Yuepeng Cai. 2020
142 citations recorded by the source corpus.
Abstract Lithium sulfur (Li-S) battery is regarded as one of the most promising next generation high-energy storage systems. However, the shuttle effect and sluggish redox kinetics of lithium polysulfides always compromise the cycling performance of Li-S batteries. Herein, an effective strategy is presented to fabricate high-performance Li–S batteries using a 3D network-like nanocomposite of Co/NCNS/CNT, which is obtained via the well-distributed composition of the carbon nanotubes (CNTs) (in situ formed and added) with nitrogen-doped carbon nanosheets (NCNS) as well as Co nanoparticles from carbonization of the nitrogen-rich bio-MOF-100 nanosheets at an inert atmosphere. Owing to good sulphiphilicity, excellent conductivity and high catalytic activity from Co-Nx and Co nanoparticles, Co/NCNS/CNT nanocomposite could effectively adsorb and catalyze the fast conversion of lithium polysulfides. When serving as the separator coating for Li-S cells, the cell shows excellent performances with an initial capacity of 972.4 mAh/g at 2C under a sulfur loading of 2.0 mg/cm2, and excellent cycling stability with the capacity decay of 0.05% per cycle during the 1000 long-term cycles. Furthermore, even at a high sulfur loading of 5 mg/cm2, the specific capacity of 522.1 mAh/g (2.61 mAh/cm2) can be maintained after 500 cycles at 1 C, thus providing a promising path toward advanced Li–S batteries.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/570786fe1512928fc5e53ec875b6af9db7e40d00
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In Electrical and Electronic Engineering
Citations in the corpus
- Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries (2020, background): “On the basis of the physical/chemical adsorption effect, some trapping materials also exhibit good catalytic activity for the polysulfide reduction reaction.(114-119) Metal sulfides like Co9S8, 120 MoS2, 121,122”