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

Abylay Abilkhan, Valeriya Volobuyeva, Saparbek Tugelbay, Dauren Batyrbekuly, Fail R. Sultanov, Nurzhan Umirov, Batukhan Tatykayev

2026

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DOI 10.18321/cpc24(1)1-7

Data confidence 70 medium

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Abstract

The primary aim of this work is to demonstrate the influence of boron doping on LiCoPO4 (LCP) cathodes with a focus on conductivity and interfacial processes. 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 impedance spectroscopy showed improved lithium-ion diffusion, higher coulombic efficiency (to ~75% vs. ~65%) and moderate capacity retention for the doped sample (~60 mAh·g-1 after 20 cycles) compared to pristine LCP. These findings highlight that boron doping effectively enhances conductivity and mitigates interfacial limitations of LCP, providing a promising, but still preliminary strategy for the development of high-voltage LIBs cathodes.