Communication

V2O5 Textile Cathodes with High Capacity and Stability for Flexible Lithium‐Ion Batteries

Yujing Zhu

Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083 P. R. China

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Beijing, 100190 P. R. China

Laboratory for Advanced Interfacial Materials and Devices, Research Center for Smart Wearable Technology, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, 999077 China

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Mei Yang

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Beijing, 100190 P. R. China

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Qiyao Huang

Laboratory for Advanced Interfacial Materials and Devices, Research Center for Smart Wearable Technology, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, 999077 China

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Dongrui Wang

School of Chemistry and Biological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083 P. R. China

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Ranbo Yu

Corresponding Author

E-mail address: [email protected]

Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083 P. R. China

Laboratory of Material Processing and Mold, Ministry of Education, Zhengzhou University, Zhengzhou, 450001 P. R. China

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Jiangyan Wang

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Beijing, 100190 P. R. China

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Zijian Zheng

Corresponding Author

E-mail address: [email protected]

Laboratory for Advanced Interfacial Materials and Devices, Research Center for Smart Wearable Technology, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong SAR, 999077 China

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Dan Wang

Corresponding Author

E-mail address: [email protected]

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Beijing, 100190 P. R. China

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ranboyu[email protected]

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First published: 10 January 2020

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Abstract

Textile‐based energy‐storage devices are highly appealing for flexible and wearable electronics. Here, a 3D textile cathode with high loading, which couples hollow multishelled structures (HoMSs) with conductive metallic fabric, is reported for high‐performance flexible lithium‐ion batteries. V2O5 HoMSs prepared by sequential templating approach are used as active materials and conductive metallic fabrics are applied as current collectors and flexible substrates. Taking advantage of the desirable structure of V2O5 HoMSs that effectively buffers the volume expansion and alleviates the stress/strain during repeated Li‐insertion/extraction processes, as well as the robust flexible metallic‐fabric current collector, the as‐prepared fabric devices show excellent electrochemical performance and ultrahigh stability. The capacity retains a high value of 222.4 mA h g−1 at a high mass loading of 2.5 mg cm−2 even after 500 charge/discharge cycles, and no obvious performance degradation is observed after hundreds of cycles of bending and folding. These results indicate that V2O5 HoMSs/metallic‐fabric cathode electrode is promising for highly flexible lithium‐ion batteries.

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