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A flexible electrode of TiO2 nanowire arrays modified with graphene for solid-state cable-type supercapacitors

  • Jinghao HuoEmail author
  • Yujia Xue
  • Cheng Cheng
  • Shouwu Guo
Original Paper
  • 37 Downloads

Abstract

Solid-state cable-type supercapacitors (SSCTSs) have a wide application in wearable and flexible electronic devices. The fiber-shaped electrode of fabricating TiO2 nanowire arrays (NWAs) on Ti wire is widly used in flexible electronic devices. For improving the conductivity, reduced graphene oxide (rGO) nanosheets are prepared on the surface of TiO2 NWAs by a simple electrophoretic deposition method and NaBH4 treatment. The electrochemical tests reveal that this TiO2/rGO electrode has an excellent capacitive property than pure TiO2 electrode in the optimum potential window (− 0.4~0.6 V). Two similar TiO2/rGO electrodes with Poly (vinyl alcohol)-LiCl solid-state electrolyte are assembled SSCTSs, which deliver a specific capacitance as high as 60.8 μF cm−1 at 5 μA cm−1 and a high energy density of 12.2 mWh cm−1 with a wide potential window from 0 to 1.2 V. Furthermore, this SSCTS exhibits outstanding banding performance at different state and long cycle life. These results demonstrate that fiber-shaped TiO2/rGO electrode is promising for high-performance wearable and flexible electronic devices.

Keywords

TiO2 nanowire arrays Graphene Solid-state Cable-type Supercapacitors 

Notes

Funding information

This work received financial support from the Fujian Key Laboratory of Photoelectric Functional Materials Open Research Project (FJPFM-201701) and the Natural Science Foundation of Shaanxi University of Science and Technology (2016BJ-49).

Supplementary material

11581_2019_3275_MOESM1_ESM.doc (368 kb)
ESM 1 (DOC 368 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Jinghao Huo
    • 1
    • 2
    Email author
  • Yujia Xue
    • 1
  • Cheng Cheng
    • 1
  • Shouwu Guo
    • 1
    • 3
  1. 1.School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi’anChina
  2. 2.Fujian Key Laboratory of Photoelectric Functional MaterialsHuaqiao UniversityXiamenChina
  3. 3.Department of Electronic Engineering, School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghaiChina

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