A1 Journal article (refereed)
Optimized Morphology and Tuning the Mn3+ Content of LiNi0.5Mn1.5O4 Cathode Material for Li-Ion Batteries (2023)

Lin, Y., Välikangas, J., Sliz, R., Molaiyan, P., Hu, T., & Lassi, U. (2023). Optimized Morphology and Tuning the Mn3+ Content of LiNi0.5Mn1.5O4 Cathode Material for Li-Ion Batteries. Materials, 16(8), Article 3116. https://doi.org/10.3390/ma16083116

JYU authors or editors

Publication details

All authors or editors: Lin, Yan; Välikangas, Juho; Sliz, Rafal; Molaiyan, Palanivel; Hu, Tao; Lassi, Ulla

Journal or series: Materials

eISSN: 1996-1944

Publication year: 2023

Publication date: 15/04/2023

Volume: 16

Issue number: 8

Article number: 3116

Publisher: MDPI AG

Publication country: Switzerland

Publication language: English

DOI: https://doi.org/10.3390/ma16083116

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/86435

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.

Keywords: lithium-ion batteries; electrochemistry

Free keywords: LiNi0.5Mn1.5O4; sol-gel method; Mn3+ content; cathode materials; li-ion battery

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2023

JUFO rating: 1