title: Elastic and wearable wire-shaped lithium-ion battery with high electrochemical performance.
abstract: A stretchable wire-shaped lithium-ion battery is produced from two aligned multi-walled carbon nanotube/lithium oxide composite yarns as the anode and cathode without extra current collectors and binders. The two composite yarns can be well paired to obtain a safe battery with superior electrochemical properties, such as energy densities of 27 Wh kg(-1) or 17.7 mWh cm(-3) and power densities of 880 W kg(-1) or 0.56 W cm(-3), which are an order of magnitude higher than the densities reported for lithium thin-film batteries. These wire-shaped batteries are flexible and light, and 97 % of their capacity was maintained after 1000 bending cycles. They are also very elastic as they are based on a modified spring structure, and 84 % of the capacity was maintained after stretching for 200 cycles at a strain of 100 %. Furthermore, these novel wire-shaped batteries have been woven into lightweight, flexible, and stretchable battery textiles, which reveals possible large-scale applications.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438 (China).
authors.forename: Jing
authors.initials: J
authors.lastname: Ren
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhang
authors.forename: Wenyu
authors.initials: W
authors.lastname: Bai
authors.forename: Xuli
authors.initials: X
authors.lastname: Chen
authors.forename: Zhitao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Fang
authors.forename: Wei
authors.initials: W
authors.lastname: Weng
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Wang
authors.forename: Huisheng
authors.initials: H
authors.lastname: Peng
keywords: carbon-based materials; electrochemistry; lithium-ion batteries; nanotubes