Li2ZrO3-coated 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 for high performance cathode material in lithium-ion battery

• Published in: Journal of power sources Vol. 264; pp. 147 - 154
• Main Authors: Miao, Xiaowei, Ni, Huan, Zhang, Han, Wang, Chunguang, Fang, Jianhui, Yang, Gang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2014; Elsevier
• Subjects: Applied sciences; Cathode materials; Coating; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemical performance; Exact sciences and technology; Lithium-ion batteries; Materials; Lithium-ion batteries; Electrochemical performance; Coating; Cathode materials; Ternary compound; Lithium ion batteries; High performance; Coating material; Cathode; Lithium Oxides; Secondary cell; Electrode material; Coatings; Coated material; Electrochemical characteristic; Zirconium Oxides; Electrical characteristic
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2014.04.068

To improve the high-rate capacity and cycle ability, minor Li2ZrO3 successfully coat the nanoparticles of 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 (LMO) via sol–gel method. The crystal structure and electrochemical properties of the bare and coated material are studied by X-ray diffractometry (XRD), transmission electron microscopy (TEM), cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT), and charge–discharge tests. The lithium diffusion coefficient of LMO increases one to two orders of magnitude after Li2ZrO3 coating. Li2ZrO3 coating improves the rate capability and cycling stability of LMO. Within the cut-off voltage of 2.5–4.8 V, the initial discharge capacity of Li2ZrO3-coated 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 (LZO-LMO) reaches to 264 mAh g−1 at 0.1 C rate, and the capacity remains 235 mAh g−1 after 100 cycles. At the current rates of 1, 2, 5 and 10 C, the maximum discharge capacities of LZO-LMO are 205.6, 161, 153.8 and 106 mAh g−1, respectively. Minor Li2ZrO3 modification plays an important role to enhance the high-rate capability and cycle ability of LMO. •Li2ZrO3 coating 0.4Li2MnO3·0.6LiNi1/3Co1/3Mn1/3O2 synthesized by sol–gel method.•DLi+ of LMO increases one to two orders of magnitude after Li2ZrO3 coating.•Li2ZrO3 coated sample delivers 263.7 mAh g−1 at 0.1 C and good cycle performance.•Minor Li2ZrO3 modification enhances high-rate capability and cycle ability of LMO.