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A Flexible Quasi‐Solid‐State Asymmetric Electrochemical Capacitor Based on Hierarchical Porous V 2 O 5 Nanosheets on Carbon Nanofibers
Author(s) -
Li Linlin,
Peng Shengjie,
Wu Hao Bin,
Yu Le,
Madhavi Srinivasan,
Lou Xiong Wen David
Publication year - 2015
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201500753
Subject(s) - materials science , capacitor , electrode , electrochemistry , nanotechnology , power density , nanofiber , carbon nanofiber , porosity , optoelectronics , carbon fibers , composite number , carbon nanotube , composite material , power (physics) , electrical engineering , voltage , chemistry , physics , quantum mechanics , engineering
The development of 3D nanoarchitectures on flexible current collectors has emerged as an effective strategy for preparing advanced portable and wearable power sources. Herein, a flexible and efficient electrode is demonstrated based on electrospun carbon fibers (ECF) substrate with elaborately designed hierarchical porous V 2 O 5 nanosheets (V 2 O 5 –ECF). The unique configuration of V 2 O 5 –ECF composite film fully enables utilization of the synergistic effects from both high electrochemical performance of V 2 O 5 and excellent conductivity of ECF, endowing the films to be an excellent electrode for flexible and lightweight electrochemical capacitors (ECs). Benefiting from their intriguing structural features, V 2 O 5 –ECF and ECF films, directly used as electrodes for flexible asymmetric quasi‐solid‐state electrochemical capacitors, achieve superior flexibility and reliability, enhanced energy/power density, and outstanding cycling stability. Moreover, the ability to power light‐emitting diodes (LED) also indicates the feasibility for practical use. Therefore, it is believed that this novel design may find promising application in flexible devices in future.