Boron-Doped LiCoPO4 as a High-Voltage Cathode for Lithium-Ion Batteries

The effect of boron doping on LiCoPO4 (LCP) cathodes was investigated to enhance high-voltage lithium-ion battery performance. Pristine and B-doped LCP were synthesized via a two-step solid-state method. XRD and SEM confirmed phase purity, lattice distortion and reduced particle size in the doped sample. Electrochemical tests showed improved lithium-ion diffusion, specific capacity (~130 mAh·g-1 in the first cycle), and better capacity retention (~60 mAh·g-1 after 20 cycles) for B-doped LCP. Coulombic efficiency increased from ~65% to ~75%. Boron doping effectively overcomes the limitations of LCP, making it a promising approach for high-performance lithium-ion battery cathodes.