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

机译:锂离子电池电极的生物成分辅助形成多孔TiO2

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摘要

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 mu m) 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.
机译:通过使用低成本的生物成分作为孔形成模板来合成大孔TiO 2。在含有NH4OH(水溶液)的C 2 H 5 OH(L)中的TiCl4在速溶酵母和葡萄糖存在下聚合。进一步加工有机 - 无机杂交前体以产生大孔锐钛矿TiO 2(孔径:2.5-3μm),中孔(4-51nm)。通过化学气相沉积用薄的碳层涂覆多孔TiO 2,以产生分层C / TiO2纳米复合材料。研究多孔产物作为锂离子电池的阳极材料。在5c和10c的高电荷/放电速率下,分层C / TiO 2电极材料的容量保持180mA H(-1)和142mA H(-1)。它在各种放电速率下表现出318mA H(-1)的良好循环稳定性。优异的性能归因于C / TiO2的高比表面积和开放空间,允许轻松插入/ Li离子的拆卸。

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  • 来源
    《RSC Advances》 |2015年第44期|共7页
  • 作者单位

    Natl Chiao Tung Univ Dept Appl Chem Hsinchu 30010 Taiwan;

    Natl Chiao Tung Univ Dept Appl Chem Hsinchu 30010 Taiwan;

    Natl Chiao Tung Univ Dept Appl Chem Hsinchu 30010 Taiwan;

    Natl Tsing Hua Univ Dept Mat Sci &

    Engn Hsinchu 30013 Taiwan;

    Natl Chiao Tung Univ Dept Appl Chem Hsinchu 30010 Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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