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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Metal-organic framework derived yolk-shell NiS2/carbon spheres for lithium-sulfur batteries with enhanced polysulfide
Yaxi Tian1, Huawen Huang1, Guoxue Liu1
1School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China. celeizhang@scut.edu.cn.
Abstract:
Yolk-shell NiS2/carbon spheres (yolk-shell NiS2/C) have been synthesized by one-step annealing of yolk-shell Ni-metal-organic framework spheres. In particular, both the inner yolk sphere and the outer shell of yolk-shell NiS2/C can provide catalytically active sites for the redox of polysulfide confined in the yolk-shell structure, providing enhanced redox kinetics. A yolk-shell NiS2/C-sulfur cathode exhibits a high rate capacity of 569 mA h g-1 at 2C and shows excellent cycling stability, demonstrating the superiority of the yolk-shell structure.
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