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\bibitem{Sun_etal2015} {\textquotedblleft}\textit{Li$_{2}$Cu$_{2}$O(SO$_{4}$)$_{2}$: a possible electrode for sustainable Li-based batteries showing a 4.7 V redox activity vs Li$^{+}$/Li$^{0}$}{\textquotedblright}. Sun M, Rousse G, Abakumov AM, Saubanere M, Doublet M-L, Rodriguez-Carvajal J, Van Tendeloo G, Tarascon J-M, Chemistry of materials \textbf{27}, 3077 (2015).   http://doi.org/10.1021/acs.chemmater.5b00588

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