Citation: WANG Shao-Liang, TANG Zhi-Yuan, SHA Ou, YAN Ji. Synthesis and Electrochemical Performance of LiCoPO₄ by Sol-Gel Method[J]. Acta Physico-Chimica Sinica, ;2012, 28(02): 343-348. doi: 10.3866/PKU.WHXB201111031 shu

Synthesis and Electrochemical Performance of LiCoPO₄ by Sol-Gel Method

1.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China

Received Date: 19 August 2011
Available Online: 3 November 2011
Fund Project: 国家自然科学基金(20973124)资助项目 (20973124)

High potential cathode material LiCoPO₄ was synthesized by sol-gel method. The effects of different sintering conditions on the crystal structure, surface morphology and electrochemical performance of LiCoPO₄ were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and charge-discharge tests. The results show that the sample synthesized at 650 ° C for 12 h has a od crystalline orthorhombic olivine-type structure and a uniform particle distribution (0.2-0.4 μm), which delivers the best electrochemical performance. The discharge capacity of the sample at 1C rate can reach 122.7 mAh·g^-1. Moreover, from the charge and discharge profiles, two charge/discharge plateaus are presented and they become more obvious with the increase of charge/discharge rate. This phenomenon can be interpreted by considering the two-step extraction/insertion behavior of Li+ in LiCoPO₄.
- Lithium-ion battery,
- LiCoPO₄,
- Cathode material,
- Sol-gel method
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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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Synthesis and Electrochemical Performance of LiCoPO₄ by Sol-Gel Method