Improving diffusion kinetics and phase stability of LiCoO2 via surface modification at elevated voltage

•The LATP with trace Ti-Al co-doping modify LCO via a facile sol-gel method.•The surface modifications promote Li+ interface dynamics and suppress phase transition.•The C-LCO exhibits excellent electrochemical performance at 4.5 V and 50 °C. To achieve higher energy density, the lithium cobalt oxide...

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