A comparison of preparation method on the electrochemical performance of cathode material Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 for lithium ion battery

• Published in: Electrochimica acta Vol. 56; no. 8; pp. 3071 - 3078
• Main Authors: Zheng, J.M., Wu, X.B., Yang, Y.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2011
• Subjects: Co-precipitation; Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2; Lithium-rich material; Sol–gel; Sucrose combustion; Lithium-rich material; Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2; Sucrose combustion; Sol–gel; Co-precipitation
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2010.12.049

Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 as a cathode material for Li-ion battery has been successfully prepared by co-precipitation (CP), sol–gel (SG) and sucrose combustion (SC) methods. The prepared materials were characterized by XRD, SEM, BET and electrochemical measurements. The XRD result shows that the Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 materials prepared by different methods all form a pure phase with good crystallinity. SEM images and BET data present that the SC-material exhibited the smallest particle size (ca. 0.1 μm) and the highest surface area (7.4635 m 2 g −1). The tap density of SC-material is lower than that of CP- and SG-materials. The result of rate performance tests indicates that the SC-material showed the best rate capability with the highest discharge capacity of 178 mAh g −1 at 5.0 C, followed by SG-material and then CP-material. However, the cycling stability of SC-material tested at 0.1 and 0.5 C is relatively poor as compared to that of SG-material and CP-material. The result of EIS measurements reveals that large surface area and small particle size of the SC-electrode result in more SEI layer formation because of the increased side reactions with the electrolyte during cycling, which deteriorates the electrode/electrolyte interface and thus leads to the faster capacity fading of the SC-material.