Reduction of the lithium and nickel site substitution in Li1+xNi0.5Co0.2Mn0.3O2 with Li excess as a cathode electrode material for Li-ion batteries

Autor:	Hongquan Liu, Qing-Feng Zang, Yanmin Wang, Shun-Wei Fan, Yunbo Chen, Xiu-Li Yang, Yijie Gu, Wang Haifeng, Qing-Gang Zhang, Lin Chen, Jianxu Ding, Meng Wang
Rok vydání:	2015
Předmět:	Materials science Mechanical Engineering Diffusion Inorganic chemistry Metals and Alloys Cathode electrode chemistry.chemical_element Thermal diffusivity Ion Nickel chemistry Mechanics of Materials Cathode material Materials Chemistry Lithium Faraday efficiency
Zdroj:	Journal of Alloys and Compounds. 630:316-322
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2014.12.235
Popis:	Layered Li 1+ x Ni 0.5 Co 0.2 Mn 0.3 O 2 ( x = 0, 0.02, 0.04, 0.06, 0.08) materials were synthesized using the co-precipitation method. Rietveld refinements measurements reveal that the concentration of Ni 2+ -3b ions decreases from 0.06 to 0.043, with x changing from 0.02 to 0.08. The initial coulombic efficiency improves with the increase in the content of Li-excess because the content of Ni at the 3b site decreases with the increase of Li-excess in the samples from 0 to 0.08. The analysis indicates that Li 1.08 Ni 0.5 Co 0.2 Mn 0.3 O 2 exhibits the largest diffusivity value due to the dependence of the diffusion coefficient of lithium ions on the content of Ni in the 3b sites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17e263fa876578ba5b99af89d4aa1ac5 https://doi.org/10.1016/j.jallcom.2014.12.235 Zobrazit plný text záznamu Full Text from ScienceDirect