Bio-ingredient assisted formation of porous TiO2 for Li-ion battery electrodes

Yi Chun Chang, Chih Wei Peng, Po Chin Chen, Chi Young Lee, Hsin Tien Chiu*

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Macroporous TiO2 was synthesized by using low-cost bio-ingredients as the pore forming templates. TiCl4 in C2H5OH(l) containing NH4OH(aq.) was polymerized in the presence of instant yeast and glucose. The organic-inorganic hybrid precursor was further processed to generate macroporous anatase TiO2 (pore size: 2.5-3 μm) with mesopores (4-51 nm). The porous TiO2 was coated with a thin layer of carbon by chemical vapour deposition to generate the hierarchical C/TiO2 nanocomposite material. The porous products were investigated as anode materials for Li-ion batteries. The capacities of the hierarchical C/TiO2 electrode material remained 180 mA h g-1 and 142 mA h g-1 under high charge/discharge rates of 5 C and 10 C, respectively. It demonstrated good cycling stability of 318 mA h g-1 at 0.1 C at various discharge-charge rates. The excellent performance is attributed to the high specific surface areas and open spaces of the C/TiO2 allowing effortless intercalation/deintercalation of Li ions.

Original languageEnglish
Pages (from-to)34949-34955
Number of pages7
JournalRSC Advances
Volume5
Issue number44
DOIs
StatePublished - 1 Jan 2015

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