Direct growth of NiO nanosheets on mesoporous TiN film for energy storage devices

Jae Hun Lee, Jung Yup Lim, Chang Soo Lee, Jung Tae Park, Jong Hak Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report an efficient energy storage electrode based on well-defined, interconnected NiO nanosheets (NiO-NS) grown directly on a mesoporous TiN (meso-TiN) film via a solvothermal method. A mesoporous TiO 2 (meso-TiO 2 ) film is prepared using a graft copolymer template and then thermally annealed in ammonia at 800 °C to convert meso-TiO 2 into meso-TiN. The ultrathin interconnected NiO-NS provide a large surface area and effective electron pathway, which enhance their specific capacitance and electrochemical properties. In contrast, a less-organized structure with poor homogeneity, low porosity and some cracks is formed for dense-TiN film prepared without the PVC-g-POEM. The meso-TiN film acts as an efficient conductive support to grow the NiO-NS and enhances the diffusion of electron/electrolyte ions. Despite its low thickness (<1.3 μm), the NiO-NS/meso-TiN supercapacitor exhibits a high capacitance of 104 mF cm −2 and good cycle stability (86% capacitance retention) owing to the synergetic effects of the NiO-NS and meso-TiN heteronanostructure. The NiO-NS/meso-TiN film is also applied to a flexible substrate and exhibits no cracks after bending; thus, our work provides an efficient way to design flexible energy storage devices using graft-copolymer-directed heteronanostructures.

Original languageEnglish
Pages (from-to)849-857
Number of pages9
JournalApplied Surface Science
Volume420
DOIs
Publication statusPublished - 2017 Oct 31

Fingerprint

Nanosheets
energy storage
Energy storage
capacitance
Capacitance
Graft copolymers
copolymers
cracks
Cracks
electrochemical capacitors
Electrons
homogeneity
ammonia
Electrochemical properties
Ammonia
Polyvinyl chlorides
electrons
templates
Electrolytes
electrolytes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Lee, Jae Hun ; Lim, Jung Yup ; Lee, Chang Soo ; Park, Jung Tae ; Kim, Jong Hak. / Direct growth of NiO nanosheets on mesoporous TiN film for energy storage devices. In: Applied Surface Science. 2017 ; Vol. 420. pp. 849-857.
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Direct growth of NiO nanosheets on mesoporous TiN film for energy storage devices. / Lee, Jae Hun; Lim, Jung Yup; Lee, Chang Soo; Park, Jung Tae; Kim, Jong Hak.

In: Applied Surface Science, Vol. 420, 31.10.2017, p. 849-857.

Research output: Contribution to journalArticle

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