An Ultraflexible Silicon–Oxygen Battery Fiber with High Energy Density. Issue 44 (2nd October 2017)

• Record Type: Journal Article
• Authors: Zhang, Ye; Jiao, Yiding; Lu, Lijun; Wang, Lie; Chen, Taiqiang; Peng, Huisheng
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 44(2017)
• Page Start: 13741
• Page End: 13746
• Publication Date: 2017-10-02
• Subjects: batteries -- carbon nanotube fibers -- electrochemistry -- energy storage -- wearable electronic devices; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201707840
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: To satisfy the rapid development of portable and wearable electronics, it is highly desired to make batteries with both high energy densities and flexibility. Although some progress has been made in recent decades, the available batteries share critical problems of poor energy storage capacity and low flexibility. Herein, we have developed a silicon–oxygen battery fiber with high energy density and ultra‐high flexibility by designing a coaxial architecture with a lithiated silicon/carbon nanotube hybrid fiber as inner anode, a polymer gel as middle electrolyte and a bare carbon nanotube sheet as outer cathode. The fiber showed a high energy density of 512 Wh kg −1 and could effectively work after bending for 20 000 cycles. These battery fibers have been further woven into flexible textiles for a large‐scale application. Abstract : A silicon–oxygen battery fiber with high energy density and ultra‐high flexibility has been created. The coaxial architecture of the fiber was obtained by using a lithiated silicon/carbon nanotube hybrid fiber as inner anode, a polymer gel as middle electrolyte and a carbon nanotube sheet as outer cathode.