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Freestanding Carbon Nanotube Film for Flexible Straplike Lithium/Sulfur Batteries |
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| Authors: | Xiaoyu Ding Dr Zhenghui Pan Na Liu Linge Li Xianshu Wang Guoguang Xu Jie Yang Jin Yang Nengsheng Yu Meinan Liu Prof Wanfei Li Prof Yuegang Zhang |
| Institution: | 1. i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123 P. R. China
Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123 P. R. China These authors contributed equally to this work.;2. i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123 P. R. China Department of Materials Science and Engineering, National University of Singapore, Singapore, 117574 Singapore These authors contributed equally to this work.;3. i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123 P. R. China;4. i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123 P. R. China Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123 P. R. China;5. School of Chemistry and Environment, South China Normal University, Guangzhou, 510631 P. R. China;6. School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 P. R. China |
| Abstract: | Flexible lithium/sulfur (Li/S) batteries are promising to meet the emerging power demand for flexible electronic devices. The key challenge for a flexible Li/S battery is to design a cathode with excellent electrochemical performance and mechanical flexibility. In this work, a flexible strap-like Li/S battery based on a S@carbon nanotube/Pt@carbon nanotube hybrid film cathode was designed. It delivers a specific capacity of 1145 mAh g?1 at the first cycle and retains a specific capacity of 822 mAh g?1 after 100 cycles. Moreover, the flexible Li/S battery retains stabile specific capacity and Coulombic efficiency even under severe bending conditions. As a demonstration of practical applications, an LED array is shown stably powered by the flexible Li/S battery under flattened and bent states. We also use the strap-like flexible Li/S battery as a real strap for a watch, which at the same time provides a reliable power supply to the watch. |
| Keywords: | carbon nanotube films flexible electrodes flexible electronic devices lithium/sulfur batteries straplike |