Fabrication and electrochemical properties of carbon nanotube/polypyrrole composite film electrodes with controlled pore size

Ji Young Kim, Kwang Heon Kim, Kwang Bum Kim

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Carbon nanotube (CNT)/polypyrrole (PPy) composites with controlled pore size in a three-dimensional entangled structure of a CNT film are prepared as electrode materials for a pseudocapacitor. A CNT film electrode containing nanosize silica between the CNTs is first fabricated using an electrostatic spray deposition of a mixed suspension of CNTs and nanosize silica on to a platinium-coated silicon wafer. Later, nanosize silica is removed leaving a three-dimensional entangled structure of a CNT film. Before removal of the silica from the CNT/silica film electrode, PPy is electrochemically deposited on to the CNTs to anchor them in their entangled structure. Control of the pore size of the final CNT/PPy composite film can be achieved by changing the amount of silica in the mixed suspension of CNTs and nanosize silica. Nanosize silica acts as a sacrificial filler to change the pore size of the entangled CNT film. Scanning electron microscopy of the electrochemically prepared PPy on the CNT film substrate shows that the PPy nucleated heterogeneously and deposited on the surface of the CNTs. The specific capacitance and rate capability of the CNT/PPy composite electrode with a heavy loading of PPy of around 80 wt.% can be improved when it is made to have a three-dimensional network of entangled CNTs with interconnected pores through pore size control.

Original languageEnglish
Pages (from-to)396-402
Number of pages7
JournalJournal of Power Sources
Volume176
Issue number1
DOIs
Publication statusPublished - 2008 Jan 21

Fingerprint

Carbon Nanotubes
polypyrroles
Polypyrroles
Composite films
Electrochemical properties
Pore size
Silicon Dioxide
Carbon nanotubes
carbon nanotubes
porosity
Silica
Fabrication
Electrodes
fabrication
composite materials
electrodes
silicon dioxide
Suspensions
polypyrrole
Composite materials

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "Carbon nanotube (CNT)/polypyrrole (PPy) composites with controlled pore size in a three-dimensional entangled structure of a CNT film are prepared as electrode materials for a pseudocapacitor. A CNT film electrode containing nanosize silica between the CNTs is first fabricated using an electrostatic spray deposition of a mixed suspension of CNTs and nanosize silica on to a platinium-coated silicon wafer. Later, nanosize silica is removed leaving a three-dimensional entangled structure of a CNT film. Before removal of the silica from the CNT/silica film electrode, PPy is electrochemically deposited on to the CNTs to anchor them in their entangled structure. Control of the pore size of the final CNT/PPy composite film can be achieved by changing the amount of silica in the mixed suspension of CNTs and nanosize silica. Nanosize silica acts as a sacrificial filler to change the pore size of the entangled CNT film. Scanning electron microscopy of the electrochemically prepared PPy on the CNT film substrate shows that the PPy nucleated heterogeneously and deposited on the surface of the CNTs. The specific capacitance and rate capability of the CNT/PPy composite electrode with a heavy loading of PPy of around 80 wt.{\%} can be improved when it is made to have a three-dimensional network of entangled CNTs with interconnected pores through pore size control.",
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Fabrication and electrochemical properties of carbon nanotube/polypyrrole composite film electrodes with controlled pore size. / Kim, Ji Young; Kim, Kwang Heon; Kim, Kwang Bum.

In: Journal of Power Sources, Vol. 176, No. 1, 21.01.2008, p. 396-402.

Research output: Contribution to journalArticle

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