X射线衍射Rietveld精修及其在锂离子电池正极材料中的应用

杨卓(

), 卢勇, 赵庆, 陈军(

)

X-ray Diffraction Rietveld Refinement and Its Application in Cathode Materials for Lithium-ion Batteries

YANG Zhuo(

), LU Yong, ZHAO Qing, CHEN Jun(

)

图6. 正极材料LiNi_0.6Co_0.2Mn_0.2O₂的合成过程温度分辨XRD表征结果^[43]

Fig. 6. Temperature-resolved XRD characterization of synthesis process of cathode material LiNi_0.6Co_0.2Mn_0.2O₂ (© 2021, Wiley-VCH)^[43]
(a) In situ XRD patterns of the mixture of Ni_0.6Co_0.2Mn_0.2(OH)₂ and LiOH·H₂O during heating and (c) corresponding weight fractions of different phases as a function of temperature; (b) 3D profiles of in situ XRD patterns, corresponding (d) evolution of phase fraction and (f) lattice parameters of the samples as a function of heating temperature starting from mixture of the Ni_0.6Co_0.2Mn_0.2CO₃ and LiOH·H₂O; (e) Schematic illustration of structural evolution during synthesis of LiNi_0.6Co_0.2Mn_0.2O₂; In (a, b), the subscripts T1, T2 and R represent Ni_0.6Co_0.2Mn_0.2(OH)₂ (P-3m1, T1 phase), LiNi_0.6Co_0.2Mn_0.2O₂ (R-3m, T2 phase) and the rock-salt-type, respectively. 1 Å=0.1 nm Colorful figures are available on website