Effect of capacity matchup in the LiNi0.5Mn1.5O4/Li4Ti5O12 cells

• Published in: Journal of power sources Vol. 183; no. 1; pp. 355 - 360
• Main Authors: XIANG, H. F, ZHANG, X, JIN, Q. Y, ZHANG, C. P, CHEN, C. H, GE, X. W
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 15-08-2008
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Overcharge; State of the art; Lithium titanium oxide; Secondary cell; Lithium nickel manganese oxide; Discharge charge cycle; Lithium battery; Lithium-ion batteries; Lithium Nickel Manganese Oxides; Capacity ratio; Capacitance; Lithium Titanium Oxides; Performance
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2008.04.091

The effect of the capacity matchup between cathode and anode in the LiNi0.5Mn1.5O4/Li4Ti5O12 cell system on cycling properties, choice of electrolyte, high voltage and overcharge tolerances was investigated by comparing the cells with Li4Ti5O12 limiting capacity with the cells with LiNi0.5Mn1.5O4 limiting capacity. The former exhibited better cycling performance and less limitation of electrolyte choice than the latter. The Li4Ti5O12-limited cell exhibited better tolerance to high voltage and overcharge than the LiNi0.5Mn1.5O4-limited cell, due to the extra capacity of Li4Ti5O12 below 1 V. It is thus recommended that the LiNi0.5Mn1.5O4/Li4Ti5O12 cell whose capacity is limited by the Li4Ti5O12 anode should be used to extend the applications of the state-of-the-art lithium-ion batteries. 17 refs.