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Streamlined two-step synthesis of spinel LiMn2O4 cathode for enhanced battery applications

Authors
Nyamaa, OyunbayarKang, Gyeong-HoKim, Jung-SooGoo, Kyeong-MoBaek, In-GyuHuh, Sun-ChulYang, Jeong-HyeonNam, Tae-HyunNoh, Jung-pil
Issue Date
Feb-2024
Publisher
Elsevier B.V.
Keywords
Cost-effective; Lithium-ion battery; Manganese acetate tetrahydrate; Spinel LiMn<sub>2</sub>O<sub>4</sub>; Streamlined synthesis
Citation
Inorganic Chemistry Communications, v.160
Indexed
SCOPUS
Journal Title
Inorganic Chemistry Communications
Volume
160
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/69038
DOI
10.1016/j.inoche.2023.111825
ISSN
1387-7003
1879-0259
Abstract
Spinel LiMn2O4 is a promising cathode material for Li-ion batteries, but suffers from capacity fading, which can be mitigated. To this end, we developed a straightforward and cost-effective two-step synthesis strategy for high-phase-purity and crystalline spinel LiMn2O4 nanopowder; the precursor Mn2O3 was fabricated via a thermal decomposition reaction, followed by a solid-state reaction with lithium acetate dihydrate. Morphological investigation revealed the presence of nanosized octahedral particles of LiMn2O4, consistent with outcomes obtained via the established sol-gel method. The subsequent annealing process was elucidated; it led to the formation of pure crystalline spinel LiMn2O4 with a crystallite size of only 62.08 nm. The nanopowder synthesized via the two-step process exhibited exceptional cycling performance, with a substantial initial charge/discharge capacity of 136.6/133.3 mAh/g and an 81 % capacity retention after 100 charge–discharge cycles. Notably, the attained morphology closely mirrored those observed in particles prepared using the conventional sol-gel method and electrochemical results is remarkably improved. Therefore, the developed method is expected to have great potential for practical application in the development of Li-ion batteries as well as other energy storage technologies. © 2023 Elsevier B.V.
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공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles
해양과학대학 > 기계시스템공학과 > Journal Articles

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