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\bibitem{UluOkudur_etal2018} {\textquotedblleft}\textit{Ti surface doping of LiNi$_{0.5}$Mn$_{1.5}$O$_{4-δ}$positive electrodes for lithium ion batteries}{\textquotedblright}. Ulu Okudur F, D{\textquoteright}Haen J, Vranken T, De Sloovere D, Verheijen M, Karakulina OM, Abakumov AM, Hadermann J, Van Bael MK, Hardy A, RSC advances \textbf{8}, 7287 (2018).   http://doi.org/10.1039/C7RA12932G

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