Radzi, Z. and Vengadaesvaran, B. and Rahim, Nasrudin Abd and Pandey, Adarsh Kumar and Arifin, K. H. and Kufian, Mohd Zieauddin and Zakuan, N. S. and Abidin, Zul Hazrin Zainal and Ramesh, T. Subramaniam (2021) High-rate and long-life cycle of nano-LiMn2O4 under high cut-off potential. Journal of Electrochemical Energy Conversion and Storage, 18 (3). ISSN 2381-6872, DOI https://doi.org/10.1115/1.4049317.
Full text not available from this repository.Abstract
Nano-LiMn2O4 was successfully synthesized by a low-temperature hydrothermal route with the absence of post-calcination treatment. Employing ethanol as an organic reagent triggers the formation of nanostructured particles approximately 30.39 nm in diameter, associated with 0.007 lattice strain. The pure phase of nano-LiMn2O4/Li displays outstanding electrochemical performances. Under 4.6 V versus Li+/Li cut-off potential, 74.3% of capacity is reserved when C-rate is increased by 50 times, while excellent capacity restoration of 96.9% after cycled again at 1 C. After 331 cycles, a capacity retention of 84.3% is harvested by nano-LiMn2O4/Li, implying the absence of phase transformations in spinel structures under such abuse conditions. This remarkable structural stability can be attributed to the small lattice strain, associated with high Li+ diffusion coefficient, which is estimated to be 10(-9.76) cm(2) s(-1) by the EIS technique. Additionally, Li+ extraction is more favorable when nano-LiMn2O4/Li is charged up to 4.6 V versus Li+/Li, interpreted by the polarization resistance (R-p) of the cell.
| Item Type: | Article |
|---|---|
| Funders: | UM Power Energy Dedicated Advanced Centre (UMPEDAC), Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC-2018 (MOHE HICOE-UMPEDAC), Ministry of Education Malaysia, University of Malaya[RU007-2018], Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC-2018 (MOHE HICOE-UMPEDAC), Ministry of Education Malaysia, University of Malaya[RU012-2019], MOSTI-NANOTEKNOLOGI TOP-DOWN (NANOFUND)[53-02-03-1089] |
| Uncontrolled Keywords: | LiMn2O4;Hydrothermal;High cut-off potential;Nanostructures;Lattice strain;Structural integrity;Advanced materials characterization;Batteries |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Science |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 31 Oct 2022 01:35 |
| Last Modified: | 31 Oct 2022 01:35 |
| URI: | http://eprints.um.edu.my/id/eprint/35352 |
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