Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6613676 | Electrochimica Acta | 2014 | 7 Pages |
Abstract
Thermal and structural stabilities of the delithiated positive electrode material LixCo2/3Ni1/6Mn1/6O2were studied by X-ray diffraction, magnetic and thermogravimetric analysis. In the opposite to the classical electrode materials LiNiO2 and LiCoO2, the structural symmetry (S.G. R-3 m) of the starting material LiCo2/3Ni1/6Mn1/6O2 is preserved during the electrochemical cycling with a small variation of the unit cell parameters. Squid measurements evidenced that practically no Ni2+ ions were present in the lithium slab even after the lithium extraction process. For the thermal stability, the highly oxidized phase Li0.3Co2/3Ni1/6Mn1/6O2 was tested. This delithiated phase undergoes only 5.16% weight loss after heating up to 600 °C. This weight loss has no effect on the structure symmetry as the starting α-NaFeO2 type structure was preserved during the thermal treatment. The obtained results coupled to the excellent electrochemical features of LiCo2/3Ni1/6Mn1/6O2clearly showits ability to compete with the commercialized cathode materials
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Abdelfattah Mahmoud, Ismael Saadoune, Siham Difi, Moulay Tahar Sougrati, Pierre-Emmanuel Lippens, José Manuel Amarilla,