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V 2 O 5 Textile Cathodes with High Capacity and Stability for Flexible Lithium‐Ion Batteries
Author(s) -
Zhu Yujing,
Yang Mei,
Huang Qiyao,
Wang Dongrui,
Yu Ranbo,
Wang Jiangyan,
Zheng Zijian,
Wang Dan
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201906205
Subject(s) - materials science , cathode , electrical conductor , current collector , electrochemistry , electrode , lithium (medication) , composite material , ion , anode , chemical engineering , nanotechnology , electrolyte , electrical engineering , medicine , chemistry , physics , quantum mechanics , endocrinology , engineering
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. V 2 O 5 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 V 2 O 5 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 V 2 O 5 HoMSs/metallic‐fabric cathode electrode is promising for highly flexible lithium‐ion batteries.