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Citation: CHEN Yong-Chong, XU Xing-Jun, CUI Hong-Zhi, DAI Ke-Hua, SONG Zhao-Shuang, JIANG Wei-Jun, QI Lu. Preferred Orientation of Crystals and the Intensity Ratios of XRD Peaks of Cathode Material LiCoO₂[J]. Acta Physico-Chimica Sinica, ;2007, 23(12): 1948-1953. doi: 10.3866/PKU.WHXB20071222 shu

Preferred Orientation of Crystals and the Intensity Ratios of XRD Peaks of Cathode Material LiCoO₂

1.
Solid State Reaction &Diffusion Laboratory, College of Materials Science &Engineering, Shandong University of Science & Technology, Qingdao 266510, Shandong Province, P. R. China; New Energy Material & Technology Laboratory, Department of Applied Chemistry, College of Chemistry &Molecular Engineering, Peking University, Beijing 100871, P. R. China; CITIC GUOAN Mengguli New Energy Technology Company Ltd. (MGL), Beijing 102200, P. R. China

Received Date: 17 September 2007
Available Online: 24 October 2007

LiCoO2 samples were synthesized by high temperature solid-state reaction method, characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The reflection and transmission XRDdata of different commercial LiCoO2 materials proved that the intensity ratio of (104) to (003) (I(104)/I(003)) reflects the degree of crystal orientation, not the order of Li and Co positions in LiCoO2 crystals. The higher the crystal orientation degree was, the smaller the ratio I(104)/I(003) would be. Experimental data also indicated this ratio value should be about 95%for the LiCoO2 crystals with no preferred orientations. Therefore, the intensity ratio I(104)/I(003) can not be considered as the main evidence for the position order of Li and Co in LiCoO2 crystals. The confusion on the intensity ratios of XRD peaks of cathode material LiCoO2 for Li-ion batteries was clarified.
- Li-ion battery; Cathode material; LiCoO2; Preferred orientation
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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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Preferred Orientation of Crystals and the Intensity Ratios of XRD Peaks of Cathode Material LiCoO2

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通讯作者: 陈斌, bchen63@163.com

Preferred Orientation of Crystals and the Intensity Ratios of XRD Peaks of Cathode Material LiCoO₂