Cobalt-doped TaOCl3 nanoparticles/carbon compounds with advanced specific capacity for lithium-ion batteries

•Develop a simple and practical method for preparing nanoparticles.•Investigate different carbon materials as substrates and their effects on electrochemical performance.•Connect the volume expansion of the electrode material into the breakdown of the battery.•Study the effect of pseudocapacitance, current density and resistance on electrode performance.