Precipitation and calcination of high-capacity LiNiO₂ cathode material for lithium-ion batteries
Välikangas, Juho; Laine, Petteri; Hietaniemi, Marianna; Hu, Tao; Tynjälä, Pekka; Lassi, Ulla (2020-12-16)
Välikangas, J.; Laine, P.; Hietaniemi, M.; Hu, T.; Tynjälä, P.; Lassi, U. Precipitation and Calcination of High-Capacity LiNiO₂ Cathode Material for Lithium-Ion Batteries. Appl. Sci. 2020, 10, 8988. https://doi.org/10.3390/app10248988
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe202101252549
Tiivistelmä
Abstract
This article presents the electrochemical results that can be achieved for pure LiNiO₂ cathode material prepared with a simple, low-cost, and efficient process. The results clarify the roles of the process parameters, precipitation temperature, and lithiation temperature in the performance of high-quality LiNiO₂ cathode material. Ni(OH)₂ with a spherical morphology was precipitated at different temperatures and mixed with LiOH to synthesize the LiNiO₂ cathode material. The LiNiO₂ calcination temperature was optimized to achieve a high initial discharge capacity of 231.7 mAh/g (0.1 C/2.6 V) with a first cycle efficiency of 91.3% and retaining a capacity of 135 mAh/g after 400 cycles. These are among the best results reported so far for pure LiNiO₂ cathode material.
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