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

Key wordsLi-ion battery      Cathode material      LiCoO2      Preferred orientation     
Received: 17 September 2007      Published: 24 October 2007
MSC2000:  O646  
  O614  
Corresponding Authors: CHEN Yong-Chong     E-mail: matscichen@126.com
Cite this article:

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. Acta Physico-Chimica Sinica, 2007, 23(12): 1948-1953.

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http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20071222     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2007/V23/I12/1948

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