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Citation: SU Yue-Feng, WU Feng, ZANG Ge, BAO Li-Ying, CHEN Shi. Porous Carbon as Template for Synthesis of Li₄Ti₅O₁₂ and Its Lithiation Performance[J]. Acta Physico-Chimica Sinica, ;2008, 24(06): 1002-1006. doi: 10.3866/PKU.WHXB20080615 shu

Porous Carbon as Template for Synthesis of Li₄Ti₅O₁₂ and Its Lithiation Performance

1.
Laboratory of National Development Center of Hi-Tech Green Materials, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P. R. China

Received Date: 6 November 2007
Available Online: 24 March 2008

Using hydrated titanium oxide sol as raw material, porous carbon as template, a novel spinel Li4Ti5O12 was synthesized. SEM, XRD, galvanostatic charge-discharge test, and alternating current impedance test were used to characterize the appearance, structure, and electrochemical performance of the oxide. The results showed that the dimension of the crystal particle of the oxide was about 200 nm. At a 0.5C (1C=0.2 mA·cm-2) current condition, the first charge-discharge efficiency of the Li4Ti5O12 electrode was 99.8%, the lithium intercalation potential or the lithium extraction potential was quite flat, and it’s reversible capacity was 117 mAh·g-1. When the current increased from 0.5C to 5C, the reversible capacity of the oxide was still above 100 mAh·g-1, which was more than 86% of the initial capacity. The Li4Ti5O12 exhibited an excellent rate capability. A.C. impedance test proved that using porous carbon as template in synthesis process could make the spinel Li4Ti5O12 have od conductivity and obvious porous characteristic.
- Hydrated titaniumoxide; Porous carbon; Li4Ti5O12
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沈阳化工大学材料科学与工程学院沈阳 110142

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Porous Carbon as Template for Synthesis of Li4Ti5O12 and Its Lithiation Performance

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通讯作者: 陈斌, bchen63@163.com

Porous Carbon as Template for Synthesis of Li₄Ti₅O₁₂ and Its Lithiation Performance