학술논문
Development of cathode materials for lithium ion rechargeable batteries based on the system Li(Ni1/3Mn1/3Co(1/3-x)Mx)O2, (M = Mg, Fe, Al and x = 0.00 to 0.33).
Document Type
Article
Author
Source
Subject
*NEGATIVE electrode
*LITHIUM-ion batteries
*STORAGE batteries
*PERFORMANCE of lithium cells
*SOLID solutions
*ELECTRIC conductivity
*X-ray diffraction
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Language
ISSN
0167-2738
Abstract
This study was based on developing Li(Ni 1/3 Mn 1/3 Co 1/3- x M x )O 2 , (M = Mg, Fe, Al and x = 0 to 0.33) materials by substituting expensive Co content in this NMC system with cheaper Mg, Fe and Al additives for the cathode application in rechargeable lithium ion batteries (LIB). The Pechini method, which is a low-cost wet chemical technique, was used for powder synthesis in this study. The XRD phase analysis revealed the formation of solid solutions of appropriate layered Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 phase of R-3 m structure in the prepared compositions over x = 0.11 substitution of Fe and Mg. Furthermore, these Fe and Mg substituted compositions showed considerably higher electrical conductivity than the base material Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 (over 0.9 × 10 − 5 S/cm at 25 °C). In the cell studies, the Fe and Mg substituted compositions with x = 0.11 showed a specific capacity of 122 and 125 mAhg − 1 , respectively, which are comparable to the specific capacity of the state-of-the-art LiCoO 2 cathode material of LIB. Altogether, this study shows the ability of preparing these NMC materials by Pechini method with appropriate structural and electrochemical properties suitable for the LIB cathode. [ABSTRACT FROM AUTHOR]