Direct access to mesoporous crystalline TiO2/carbon composites with large and uniform pores for use as anode materials in lithium ion batteries

J. Lee, Y.S. Jung, S.C. Warren, M.M.G. Kamperman, S.M. Oh, F.J. DiSalvo, U. Wiesner

Research output: Contribution to journalArticleAcademicpeer-review

37 Citations (Scopus)

Abstract

Mesoporous and highly crystalline TiO2 (anatase)/carbon composites with large (>5¿nm) and uniform pores were synthesized using PI-b-PEO block copolymers as structure directing agents. Pore sizes could be tuned by utilizing block copolymers with different molecular weights. The resulting mesoporous TiO2/carbon was successfully used as an anode material for Li ion batteries. Without addition of conducting aid (Super P), the electrode showed high capacity during the first insertion/desertion cycle due to carbon wiring inside the walls of mesoporous TiO2/carbon. The electrode further showed stable cycle performance up to 50 cycles and the specific charge capacity at 30¿C was 38¿mA h (g of TiO2)-1, which indicates CCM-TiO2/carbon can be used as a material for high rate use.
Original languageEnglish
Pages (from-to)383-390
JournalMacromolecular Chemistry and Physics
Volume212
Issue number4
DOIs
Publication statusPublished - 2011

Keywords

  • metal-oxides
  • electrode material
  • cathode materials
  • carbon nanotubes
  • anatase tio2
  • performance
  • intercalation
  • frameworks
  • nanocomposites
  • nanoparticles

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