Hierarchical TiN nanoparticles-assembled nanopillars for flexible supercapacitors with high volumetric capacitance

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Ping Qin
  • Xingxing Li
  • Biao Gao
  • Jijiang Fu
  • Lu Xia
  • Xuming Zhang
  • Kaifu Huo
  • Wenli Shen

Detail(s)

Original languageEnglish
Pages (from-to)8728-8734
Journal / PublicationNanoscale
Volume10
Issue number18
Online published12 Apr 2018
Publication statusPublished - 14 May 2018

Abstract

Titanium nitride (TiN) is an attractive electrode material in fast charging/discharging supercapacitors because of its excellent conductivity. However, the low capacitance and mechanical brittleness of TiN restricts its further application in flexible supercapacitors with high energy density. Thus, it is still a challenge to rationally design TiN electrodes with both high electrochemical and mechanical properties. Herein, the hierarchical TiN nanoparticles-assembled nanopillars (H-TiN NPs) array as binder free electrodes were obtained by nitriding of hierarchical titanium dioxide (TiO2) nanopillars, which was produced by a simple hydrothermal treatment of anodic TiO2 nanotubes (NTs) array in water. The porous TiN nanoparticles connected to each other to form ordered nanopillar arrays, effectively providing larger specific surface area and more active sites for charge storage. The H-TiN NPs delivered a high volumetric capacitance of 120 F cm-3 at 0.83 A cm-3, which is better than that of TiN NTs arrays (69 F cm-3 at 0.83 A cm-3). After assembling into all-solid-state devices, the H-TiN NPs based supercapacitors exhibited outstanding volumetric capacitance of 5.9 F cm-3 at 0.02 A cm-3 and a high energy density of 0.53 mW h cm-3. Our results reveal a new strategy to optimize the supercapacitive performance of metal nitrides.

Research Area(s)

  • SOLID-STATE SUPERCAPACITORS, SALT-TEMPLATED SYNTHESIS, REDUCED GRAPHENE OXIDE, HIGH-PERFORMANCE, ELECTROCHEMICAL PERFORMANCE, ENERGY-STORAGE, METAL-OXIDES, ELECTRODES, CARBON, STABILITY

Citation Format(s)

Hierarchical TiN nanoparticles-assembled nanopillars for flexible supercapacitors with high volumetric capacitance. / Qin, Ping; Li, Xingxing; Gao, Biao; Fu, Jijiang; Xia, Lu; Zhang, Xuming; Huo, Kaifu; Shen, Wenli; Chu, Paul K.

In: Nanoscale, Vol. 10, No. 18, 14.05.2018, p. 8728-8734.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review