Electrochemical Properties of Nanostructured Amorphous, Sol-gel-Synthesized TiO2/Acetylene Black Composite Electrodes

Hiroyasu Furukawa, Mitsuhiro Hibino, Itaru Honma

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Amorphous titanium oxide was prepared by a sol-gel route employing Ti(IV) alkoxide as a starting agent. The average size of the primary particles was about 4 nm, and the Brunauer-Emmett-Teller specific surface area was 390 m 2 g-1. Addition of acetylene black in synthesis allowed us to obtain the composite of titania and carbon materials. The composite materials could be galvano-staticly discharged and charged around 2 V vs. Li/Li+. After thermal treatment at 330°C the composite showed specific capacity above 125 mA h g-1, even under large discharge current of 10 A g-1. Based on the relationship between specific capacity and current density, the chemical diffusion coefficient of lithium was estimated to be 6 × 10-12 cm2 s-1.

Original languageEnglish
Pages (from-to)A527-A531
JournalJournal of the Electrochemical Society
Volume151
Issue number4
DOIs
Publication statusPublished - 2004 May 7
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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