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Influence of Preparation Conditions on the Properties of Lithium Titanate Fabricated by a Solid-state Method

College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P.R. China

Faculty of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, P. R. China

Integrated Composites Laboratory (ICL), Dan F. Smith Department of Chemical Engineering, Lamar University, Beaumont, TX 77710, USA

Corresponding Author Email:

dkeqiang@263.net

Received:

26 June 2012

| |

Accepted:

23 August 2012

| | Citation

v16n01a06_p025-032.pdf

OPEN ACCESS

Abstract:

Lithium titanate (Li₄Ti₅O₁₂) was prepared by a quasi solid-state method using water and ethanol as the solvents, in which Li₂CO₃ and TiO₂ were used as the starting materials. In this work, the calcination temperature, molar ratio of Li to Ti, and sintering time were all well investigated. The obtained samples were thoroughly characterized by XRD and SEM, revealing that the above three factors not only affected the crystal structure, but also the morphologies of the resultant samples. Galvanostatic charge discharge curves were also employed to evaluate the electrochemical performance of the samples. The best electrochemical performance of the samples was observed when the molar ratio of Li to Ti, sintering temperature and time are 6:5, 850 ^oC and 12 hours, respectively. It was revealed that the smaller particle size and the higher crystallinity of the resultant samples were favorable to enhance the electrochemical performance.

Keywords:

Li₄Ti₅O₁₂; solid-state method; sintering temperature; molar ratio; electrochemical performance

1. Introduction

2. Experimental

3. Results and Discussion

4. Conclusion

5. Acknowledgements

References

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Influence of Preparation Conditions on the Properties of Lithium Titanate Fabricated by a Solid-state Method