Precision Manufacturing of NaNi1/3Mn1/3Co1/3O2 Cathodes: Study of Structure Evolution and Performance at Varied Calcination Temperatures
| Autor: | Akhil Garg, Ankit Goyal, Nguyen Thanh Le Huynh, Xiao-Dong Niu, Liang Gao, Van Man Tran, Nam Phuong Pham Le, My Loan Phung Le |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Quenching Phase transition Materials science Rietveld refinement Scanning electron microscope Analytical chemistry Sodium-ion battery 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Cathode Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law 0103 physical sciences Materials Chemistry Hydroxide Calcination Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Journal of Electronic Materials. 48:5301-5309 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-019-07340-1 |
| Popis: | In this paper, we have fabricated NaNi1/3Mn1/3Co1/3O2 cathodes using a hydroxide co-precipitation followed by a multi-step solid state process. The prepared cathodes were quenched at varied calcination temperatures cycles. Formation of P3 phase was observed at 600°C quenching temperature as confirmed by x-ray diffraction (XRD) studies. The transition from P3 phase to O3 phase was observed at higher temperature and complete transition occurred at 900°C with the formation of O3 phase. Rietveld Refinement was done to calculate the lattice parameters. Surface morphology of the prepared cells was studied by scanning electron microscopy. The prepared cells were tested for remaining capacity and Na+ concentrations after charging-discharging cycles. Multivariate adaptive regression splines (MARS) were used to determine the most optimal electrode fabrication conditions for good output from the batteries. The most optimized conditions for this set of experiments are T2 = 900°C, t2 = 48 h, T3 = 900°C, t3 = 6 h and number of cycles = 80 to obtain the highest remaining Na+ ion concentration and capacity. The proposed combined numerical and experimental framework provides a higher degree of automation with precision in experimental designs for electrode fabrication. |
| Databáze: | OpenAIRE |
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