Flexible wire-shaped lithium-sulfur batteries with fibrous cathodes assembled via capillary action

Wire-Shaped lithium sulfur batteries are regarded as a promising solution for burgeoning wearable electronics, intelligent textiles, flexible electronics, due to its great advantages of high theoretical specific capacity and energy density, flexibility and weavability. However, there remains a criti...

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Bibliographic Details
Published in:Nano energy 2017-03, Vol.33, p.325-333
Main Authors: Liu, Ruiqing, Liu, Yuejiao, Chen, Jun, Kang, Qi, Wang, Linlin, Zhou, Weixin, Huang, Zhendong, Lin, Xiujing, Li, Yi, Li, Pan, Feng, Xiaomiao, Wu, Gang, Ma, Yanwen, Huang, Wei
Format: Article
Language:English
Subjects:
Capillary action
Fibrous cathode
Flexible
Lithium-sulfur batteries
Wire-shaped
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Summary:Wire-Shaped lithium sulfur batteries are regarded as a promising solution for burgeoning wearable electronics, intelligent textiles, flexible electronics, due to its great advantages of high theoretical specific capacity and energy density, flexibility and weavability. However, there remains a critical challenge in the manufacturing of mechanically robust, highly conductive and industrially processable fibrous cathodes. Here, a new and general strategy is proposed to produce freestanding sulfur-containing fibrous electrodes using industrially weavable stainless steel fibers (SSFs) as supports and current collectors. The SSFs based electrodes not only enable the feasibility of continuous processing and large-scale production, but also feature a porous fibrous structure that allows the imbibition of graphene-sulfur composite by facile capillary action. The wire-shaped lithium sulfur battery fabricated by this hybrid fibrous cathode shows mechanical robustness, high flexibility and excellent electrochemical performances. It can reach a capacity of 335mAhg−1 at a current density of 167.5 (0.1C) mAg−1, keep high stability after running for 100 cycles and realize a series of sophisticated applications for the flexible and wearable electronics. [Display omitted] •The 316 L SSFs are creatively introduced to prepare fibrous Li-S batteries cathodes.•The rGO/S composites can be self-assembled onto the metal yarns by capillary action.•The Li-S battery shows excellent mechanical and electrochemical performances.
ISSN:2211-2855
DOI:10.1016/j.nanoen.2016.12.049