A comparative study of bulk and surface W-doped high-Ni cathode materials for lithium-ion batteries
Nuroldayeva G. Umurzak T. Kireyeva A. Aishova A. Mukhan O. Kim S.-S. Bakenov Z. Umirov N.
10 March 2025Royal Society of Chemistry
Nanoscale
2025#17Issue 138192 - 8205 pp.
This study explores the influence of tungsten (W) doping on the structural and electrochemical performance of high-nickel LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode materials, aiming to enhance lithium-ion battery high rate and long-term cycling stability. Tungsten was incorporated through two distinct approaches: bulk doping via a wet-chemical co-precipitation method and surface doping via solid-state processing during calcination. Comprehensive characterization, including X-ray diffraction, scanning electron microscopy, and micro-cavity electrode electrochemical measurements was conducted to elucidate the effect of W doping on the morphology, crystallinity, and lithium-ion transport properties. Results indicate that W doping enhances charge transfer kinetics and stabilizes the NCM811 microstructure, effectively reducing capacity fade. Notably, surface-doped samples (s-LNCMW) demonstrated superior cycling stability, with 92% capacity retention after 500 cycles, attributed to the formation of a protective LixWOy layer. This study provides insights into the optimization of doped NCM cathodes, underscoring the potential of surface tungsten doping as a strategic approach for developing high-energy-density cathodes with improved cycle life for next-generation lithium-ion batteries.
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Institute of Batteries, LLC, Kabanbay Batyr Ave 53, Astana, 010000, Kazakhstan
Department of Chemistry, Nazarbayev University, Kabanbay Batyr Ave 53, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, Nazarbayev University, Kabanbay Batyr Ave 53, Astana, 010000, Kazakhstan
Department of Process Engineering and Applied Science, Dalhousie University, Halifax, B3H 4R2, NS, Canada
Graduate School of Energy Science and Technology, Chungnam National University, Yuseong-gu, Daejeon, 34134, South Korea
Center for Energy and Advanced Materials Science, National Laboratory Astana, Kabanbay Batyr Ave 53, Astana, 010000, Kazakhstan
Institute of Batteries
Department of Chemistry
Department of Chemical and Materials Engineering
Department of Process Engineering and Applied Science
Graduate School of Energy Science and Technology
Center for Energy and Advanced Materials Science
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