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
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
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.
刘树和, 刘彬, 赵焱, 张兰, 于晓华, 李如燕, 姚耀春, 董鹏. 香蒲活性炭用于锂硫电池正极材料[J]. 材料导报, 2020, 34(8): 8014-8019.
LIU Shuhe, LIU Bin, ZHAO Yan, ZHANG Lan, YU Xiaohua, LI Ruyan, YAO Yaochun, DONG Peng. Activated Carbon from Cattail Used for the Cathode Material of Lithium-Sulfur Batteries. Materials Reports, 2020, 34(8): 8014-8019.
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