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Elastic and Wearable Wire‐Shaped Lithium‐Ion Battery with High Electrochemical Performance
Author(s) -
Ren Jing,
Zhang Ye,
Bai Wenyu,
Chen Xuli,
Zhang Zhitao,
Fang Xin,
Weng Wei,
Wang Yonggang,
Peng Huisheng
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201402388
Subject(s) - materials science , battery (electricity) , anode , composite number , electrochemistry , composite material , lithium (medication) , cathode , bending , carbon nanotube , energy storage , lithium ion battery , ion , nanotechnology , electrode , power (physics) , electrical engineering , chemistry , medicine , physics , engineering , quantum mechanics , endocrinology , organic chemistry
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.