期刊
ELECTROCHIMICA ACTA
卷 116, 期 -, 页码 146-151出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.11.035
关键词
Meso/microporous carbon foam; Lithium sulfur battery; Sulfur cathode; Sulfur-carbon composite; Biomass carbon
资金
- National Science Foundation of China [21203168]
- Department of Science and Technology of Zhejiang Province [2013C31070]
- Open Fund of the Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province [2013001]
- Zhejiang Xinmiao Talent Project [2013R404073]
- National Undergraduate Innovation and Entrepreneurship Training Project [201310345017]
We report herein a three-dimensional structured carbon material as the cathode supporter for rechargeable lithium-sulfur batteries. Highly porous activated carbon foam (ACF) with micromesoporosity has been synthesized through carbonizing pomelo peel and activating by KOH. Elemental sulfur has been loaded to the micropores through a solution infiltration method to form a S/ACF nanocomposite. The resulted S/ACF nanocomposite with 60% sulfur has been tested as novel cathodes for Li-S batteries. The S/ACF nanocomposite showed an initial discharge capacity of 1258 mAh g(-1) at 0.2 C rate. After 100 cycles of charge/discharge, the S/ACF nanocomposite retained a high specific capacity of 750 mAh g(-1) with a Coulombic efficiency of 96%. The material delivered a capacity of more than 700 mAh g(-1) at 2C rate and can be recovered to 880 mAh g(-1) when the rate is returned to 0.2C. The results show that the ACF with 3D connected structure could be a promising binder-free cathode supporter for rechargeable Li-S battery with high specific energy. (C) 2013 Elsevier Ltd. All rights reserved.
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