Optimized morphology and tuning the Mn<sup>3+</sup> content of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> cathode material for li-ion batteries
Lin, Yan; Välikangas, Juho; Sliz, Rafal; Molaiyan, Palanivel; Hu, Tao; Lassi, Ulla (2023-04-15)
Lin, Y.; Välikangas, J.; Sliz, R.; Molaiyan, P.; Hu, T.; Lassi, U. Optimized Morphology and Tuning the Mn3+ Content of LiNi0.5Mn1.5O4 Cathode Material for Li-Ion Batteries. Materials 2023, 16, 3116. https://doi.org/10.3390/ma16083116
© 2023 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 (https://creativecommons.org/licenses/by/4.0/).
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2023051143456
Tiivistelmä
Abstract
The advantages of cobalt-free, high specific capacity, high operating voltage, low cost, and environmental friendliness of spinel LiNi0.5Mn1.5O₄(LNMO) material make it one of the most promising cathode materials for next-generation lithium-ion batteries. The disproportionation reaction of Mn³⁺ leads to Jahn–Teller distortion, which is the key issue in reducing the crystal structure stability and limiting the electrochemical stability of the material. In this work, single-crystal LNMO was synthesized successfully by the sol-gel method. The morphology and the Mn³⁺ content of the as-prepared LNMO were tuned by altering the synthesis temperature. The results demonstrated that the LNMO_110 material exhibited the most uniform particle distribution as well as the presence of the lowest concentration of Mn³⁺, which was beneficial to ion diffusion and electronic conductivity. As a result, this LNMO cathode material had an optimized electrochemical rate performance of 105.6 mAh g−1 at 1 C and cycling stability of 116.8 mAh g−1 at 0.1 C after 100 cycles.
Kokoelmat
- Avoin saatavuus [31995]