This dataset contains raw data for the paper: Solvothermal water-diethylene glycol synthesis of LiCoPO4 and effects of surface treatments on lithium battery performance Min Zhang, Nuria Garcia-Araez, Andrew L. Hector, John R. Owen, Robert G. Palgrave, Michael G. Palmer and Samantha Soulé DOI:10.1039/c8ra08785g Each file is associated with a figure in the manuscript or in the supplementary information, the files are labelled accordingly and details of data collection can be found therein. For further information contact the corresponding author via A.L.Hector@soton.ac.uk.