Activated porous carbon wrapped sulfur sub-microparticles as cathode materials for lithium sulfur batteries

17th IUMRS International Conference in Asia

Wang, Y.^1 ; Yan, Y.L.^1 ; Ren, B.^1 ; Yang, R.^2 ; Zhang, W.^1 ; Xu, Y.H.^1

School of Materials Science and Engineering, Xi'an

710048, China^1

School of Science, Xi'An University of Technology, Xi'an

710048, China^2

关键词: Cath-ode materials;    Composite cathode;    High energy densities;    Industrial preparation;    Initial discharge capacities;    Liquid phase deposition method;    Reversible specific capacity;    Theoretical capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012013/pdf
DOI  :  10.1088/1757-899X/182/1/012013

来源: IOP

【 摘 要 】

The lithium-sulfur batteries holds a high theoretical capacity and specific energy, which is 4-5 times larger than that of today's lithium-ion batteries, yet the low sulfur loading and large particles in the cathode greatly offset its advantage in high energy density. In the present paper, a liquid phase deposition method was introduced to synthesize sub-micro sulfur particles, which utilized as cathode materials after composed with activated porous carbon. Compared with common sublimed sulfur cathodes, as-obtained composite cathode shows an enhanced initial discharge capacity from 840.7 mAh/g to 1093 mAh/g at C/10. The reversible specific capacity after 50 cycles increased from 383 mAh/g to 504 mAh/g. The developed method has the advantages of simple process, convenient operation and low cost, and is suitable for the industrial preparation of lithium/sulfur batteries.