Abstract
Abstract Aluminum is of interest as a constituent in Li secondary battery cathodes due to its low cost and low mass. Increased intercalation potential for certain Al-doped intercalation oxides has also been predicted by ab initio calculations. We have synthesized single phase LiAl y Co 1− y O 2 and LiAl y Ni 1− y O 2 solid solutions from homogeneous hydroxide precursors. In LiAl y Ni 1− y O 2 , it was found that the addition of LiAlO 2 helps to stabilize LiNiO 2 in the α-NaFeO 2 structure during air firing, facilitating preparation of the ordered phase. A systematic increase in the open circuit voltage is observed with Al content in both LiAl y Co 1− y O 2 and LiAl y Ni 1− y O 2 solid solution, providing additional support for the ab initio calculations.
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