INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Activated Carbon from Cattail Used for the Cathode Material of Lithium-Sulfur Batteries |
LIU Shuhe1, LIU Bin2, ZHAO Yan3,4, ZHANG Lan3,4, YU Xiaohua3,4, LI Ruyan3,4, YAO Yaochun1, DONG Peng1
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1 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; 2 Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 3 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; 4 National Engineering Research Center of Waste Recovery, Kunming University of Science and Technology, Kunming 650093, China |
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Abstract Cattail derived activated carbon (CAC) was prepared by pyrolysis of natural cattail wool following with KOH activation. The CAC has a high BET surface area of 1 913.7 m2/g, large pore volume of 0.893 cm3/g and pore size distribution mainly at ~2 nm, which are beneficial to make the non-conductive sulfur being loaded into the pores of the carbon matrix in highly dispersed state,facilitate electrons transports, and restrain the diffusion of polysulfides during the galvanostatic charge/discharge processes using as the cathode matrix for the rechargeable Li-S battery. The S/CAC composite material shows an excellent cycle performance and a good rate capability. At 0.12C current, the first discharge capacity of 1 150.1 mAh/g and 663.3 mAh/g after 100 cycles, can be obtained respectively. Different rates test shows that S/CAC composite has good cycle stability and a stable ~600 mAh/g discharge capacity at 1C rate.
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Published: 25 April 2020
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Fund:This work was supported by the National Natural Science Foundation of China(51264016) and the Analysis and Testing Foundation of Kunming University of Science and Technology(20152230040) |
About author:: Shuhe Liureceived his Ph.D. degree in materials science from Institute of Metal Research (CAS) in 2008. He is currently an associate professor in Kunming University of Science and Technology (KUST) and participates in the development of energy storage materials. His research interests are preparation of bio-carbon and other advanced carbon materials, and their electrochemical performances as electrode materials in lithium ion/sulfur batteries. |
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