Optimal microwave-assisted hydrothermal synthesis of nanosized xLi2MnO3·(1 - x)LiNi1/3Co1/3Mn1/3O2 cathode materials for lithium ion battery

• Published in: Journal of power sources Vol. 247; pp. 219 - 227
• Main Authors: Miao, Xiaowei, Yan, Yuan, Wang, Chunguang, Cui, Leilei, Fang, Jianhui, Yang, Gang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 01.02.2014
• Subjects: Applied sciences; Cathodes; Charge; Coprecipitation; Diffraction patterns; Direct energy conversion and energy accumulation; Discharge; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Lithium batteries; Lithium-ion batteries; Materials; Nanostructure; Scanning electron microscopy; Lithium ion batteries; Microwave hydrothermal; Cycling; Nickel Manganites; Cobalt Oxides; Cathode; Nickel Oxides; Cyclic performance; Cobalt Manganites; Lithium Oxides; Secondary cell; Nanostructure; Electrode material; Microwave heating; Multi-element compound; Operating conditions; Hydrothermal synthesis; Manganese Oxides; Li-rich; Lithium Manganites; Cathode materials; Specific capacity; Electrical characteristic
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.08.097

Li-rich layer-structure xLi2MnO3.(1 - x)LiNi1/3Co1/3Mn1/3O2 (x = 0.2, 0.4, 0.6, 0.8) cathode materials have been synthesized by co-precipitation and microwave hydrothermal (MH) method in a short time ( similar to 60 min). The crystal structure is characterized by X-ray diffraction (XRD) patterns, and refined by two sets of diffraction data (R-3m and C2/m). The morphology is characterized by scanning and high-resolution transmission electron microscope (SEM and HRTEM) which shows the average particle size (50-100 nm). The charge/discharge results indicate xLi2MnO3.(1 - x)LiNi1/3Co1/3Mn1/3O2 (x = 0.4) synthesized at 180 degree C for 60 min has the best discharge capacity and cyclic performance. Within the cut-off voltage between 2.5 and 4.8 V, the initial discharge capacity is 325 mA h g-1 at 0.1 C rate; and after 50 cycles the discharge capacity remains 234.5 mA h g-1. The xLi2MnO3.(1 - x)LiNi1/3Co1/3Mn1/3O2 prepared by facile and rapid microwave-assisted hydrothermal (MH) is a promising preparation method in cathode material for lithium ion batteries.