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Freestanding Carbon Nanotube Film for Flexible Straplike Lithium/Sulfur Batteries
Author(s) -
Ding Xiaoyu,
Pan Zhenghui,
Liu Na,
Li Linge,
Wang Xianshu,
Xu Guoguang,
Yang Jie,
Yang Jin,
Yu Nengsheng,
Liu Meinan,
Li Wanfei,
Zhang Yuegang
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201806408
Subject(s) - battery (electricity) , carbon nanotube , cathode , faraday efficiency , materials science , lithium–sulfur battery , flexibility (engineering) , nanotechnology , electrochemistry , carbon fibers , electrode , power (physics) , electrical engineering , composite material , chemistry , engineering , physics , statistics , mathematics , quantum mechanics , composite number
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.
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