Solid Solution Li(Ni,Mn,Co,Fe)O2 Homogeneity Range
- 117 Downloads
By the combustion of the starch-based gel the two series of the nominal composition samples were synthesize: Li1.1Co1−x(Ni0.33Mn0.33Fe0.33)xO2 (0 ≤ x ≤ 1) and Li1.1Ni1−x(Mn0.33Co0.33Fe0.33)xO2 (0 ≤ x ≤ 1). The estimation of the homogeneity range’s extension of the type ɑ-NaFeO2 layered solid solution Li(Ni,Mn,Co,Fe)O2 was based on the results of the x-ray phase analysis of the obtained samples. It was found that the solid solution was continuous at the Li1+γCoO2-Li1+γNi0.33Mn0.33Fe0.33O2 conode and limited at the Li1+yNiO2-Li1+γMn0.33Co0.33Fe0.33O2 conode. Within the isobaric-isothermal tetrahedron Li1+yNiO2-Li1+yMnO2-Li1+yCoO2-Li1+yFeO2, the position of the stable range of the solid solution Li(Ni,Mn,Co,Fe)O2 is shown by the Li1+yCoO2-Li1+yNi0.5Mn0.5O2-Li1+yFeO2 and Li1+yNiO2-Li1+yMn0.5Co0.5O2-Li1+yFeO2 sections.
Keywordsgel combustion Li-ion battery materials solid solution Li(Ni,Mn,Co,Fe)O2 x-ray method
This work was supported by IGIC RAS state assignment.
- 5.X. Zhang, C. Yu, X. Huang, J. Zheng, X. Guan, D. Luo, and L. Li, Novel Composites Li[LixNi0.34−xMn0.47Co0.19]O2 (0.18 ≤ x ≤ 0.21): Synthesis and Application as High-Voltage Cathode with Improved Electrochemical Performance for Lithium Ion Batteries, Electrochim. Acta, 2012, 81, p 233–238CrossRefGoogle Scholar
- 11.W. El Mofid, Synthesis and Characterization of Novel Cathode Material with Improved Specific Capacity and Safety for Lithium Ion Batteries. Dissertation, Techniscen Universität Ilmenau., 2016Google Scholar
- 24.Y. Lu, M. Pang, S. Shi, Q. Ye, Z. Tian, and T. Wang, Enhanced Electrochemical Properties of Zr4+−doped Li1.20[Mn0.52Ni0.20Co0.08]O2 Cathode Material for Lithium-Ion Battery at Elevated Temperature, Sci. Rep., 2018, 8(2981), p 1–14Google Scholar