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Novel Synthesis of Plate-like LiFePO4 by Hydrothermal Method

Novel Synthesis of Plate-like LiFePO₄ by Hydrothermal Method

College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China

Henan ZhongPingHanBo New Energy Co., Ltd., Pingdingshan 467000, China

Advanced Manufacture Technology Center, China Academy of Machinery Science and Technology, Beijing 100044, China

Rizhao Huaxian New Energy Co., Ltd., Rizhao 276826, China

Corresponding Author Email:

guyijie@sdust.edu.cn, dingjianxu@126.com

Received:

01 October 2015

| |

Accepted:

09 December 2015

| | Citation

v19n01a07_033-036.pdf

OPEN ACCESS

Abstract:

Lithium iron phosphate (LiFePO₄) was prepared by hydrothermal synthesis method using FeSO₄·7H₂O and LiH₂PO₄as resource of Li and Fe. The ratio of Li: Fe was maintained 1:1. The results suggested that pH value played a crucial role in the synthesis of LiFePO₄, especially for the generation of impurities. We found that adding citric acid to the precursor was an effective way for chelating ferrous ions, thereby preventing the undesirable iron compounds during hydrothermal treatment. The particle morphology and the crystal orientation of the prepared LiFePO₄ particles were investigated by the XRD and SEM results. The X-ray diffraction pattern of the samples indicated that single-phase LiFePO₄ were successfully synthesized by hydrothermal method with a stoichiometric 1:1 ratio of Li :Fe.

Keywords:

hydrothermal synthesis, single phase LiFePO4, citric acid

1. Introduction

2. Experimental

3. Results and Discussion

4. Conclusions

5. Acknowledgements

References

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Novel Synthesis of Plate-like LiFePO4 by Hydrothermal Method