Effects of the Li:(Mn + Co + Ni) molar ratio on the electrochemical properties of LiMn1/3Co1/3Ni1/3O2 cathode material

• Published in: Electrochimica acta Vol. 50; no. 2-3; pp. 495 - 499
• Main Authors: TODOROV, Yanko Marinov, NUMATA, Koichi
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Oxford Elsevier 30-11-2004
• Subjects: Applied sciences; Chemistry; Corrosion; Corrosion mechanisms; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemistry; Exact sciences and technology; General and physical chemistry; Metals. Metallurgy; Lithium battery; Lithium ion battery; Electrochemical properties; Li/M ratio; Rate performance; Cathode; Layered material; Electrode material; Performance; Lithium ion
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2004.05.050

Li1+x(Mn1/3Co1/3Ni1/3)1-xO2 (x > or = 0) mixed oxides with different Li/M molar ratios (M = Mn1/3Co1/3Ni1/3) were obtained. The materials were characterized using chemical analysis, X-ray diffraction measurement, particle size distribution measurement, BET, and QOCV measurement. Rate performance and cycling performance were evaluated. Increased Li/M molar ratio, especially 1.10 < Li/M < 1.15, resulted in better cycling and rate performance as well as higher first cycle coulombic efficiency. As the discharge capacity is lower when Li/M molar ratio is greater than 1.10, the optimum ratio seems to be around 1.10. [Application: lithium ion batteries].