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Synergistic Effects of Surface Coating and Bulk Doping in Ni‐Rich Lithium Nickel Cobalt Manganese Oxide Cathode Materials for High‐Energy Lithium Ion Batteries
Author(s) -
Reissig Friederike,
Lange Martin Alexander,
Haneke Lukas,
Placke Tobias,
Zeier Wolfgang G.,
Winter Martin,
Schmuch Richard,
GomezMartin Aurora
Publication year - 2022
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202102220
Subject(s) - materials science , dopant , lithium cobalt oxide , electrochemistry , cobalt , manganese , lithium (medication) , chemical engineering , coating , nickel , cathode , thermal stability , doping , cobalt oxide , annealing (glass) , oxide , graphite , inorganic chemistry , metallurgy , nanotechnology , electrode , lithium ion battery , battery (electricity) , chemistry , medicine , power (physics) , physics , optoelectronics , quantum mechanics , engineering , endocrinology
Ni‐rich layered oxide cathodes are promising candidates to satisfy the increasing energy demand of lithium‐ion batteries for automotive applications. Thermal and cycling stability issues originating from increasing Ni contents are addressed by mitigation strategies such as elemental bulk substitution (“doping”) and surface coating. Although both approaches separately benefit the cycling stability, there are only few reports investigating the combination of two of such approaches. Herein, the combination of Zr as common dopant in commercial materials with effective Li 2 WO 4 and WO 3 coatings was investigated with special focus on the impact of different material processing conditions on structural parameters and electrochemical performance in nickel‐cobalt‐manganese (NCM) || graphite cells. Results indicated that the Zr 4+ dopant diffusing to the surface during annealing improved the electrochemical performance compared to samples without additional coatings. This work emphasizes the importance to not only investigate the effect of individual dopants or coatings but also the influences between both.