Process Engineering to Increase the Layered Phase Concentration in the Immediate Products of Flame Spray Pyrolysis
| Autor: | Yulin Lin, Jianguo Wen, Jun Lu, Joseph A. Libera, Lei Yu, Kyojin Ku, Yujia Liang, Eungje Lee |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
020209 energy Nucleation chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Combustion Cathode Adiabatic flame temperature law.invention Chemical engineering chemistry law Phase (matter) 0202 electrical engineering electronic engineering information engineering Degradation (geology) General Materials Science Lithium 0210 nano-technology Thermal spraying |
| Zdroj: | ACS Applied Materials & Interfaces. 13:26915-26923 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Flame-spray-pyrolysis (FSP) is a robust and scalable process to synthesize particles at the commodity-scale. FSP has been used to produce the precursor powders which were converted to the layered structure (R3m phase) by a postannealing step in making nickel-rich cathode materials (NCMs). Theoretically, the high flame temperature (normally >1500 K) in FSP can provide adequate energy for the phase conversion from rock-salt to layered structures and potentially enables one-step synthesis. However, the high flame temperature is a critical issue to cause lithium loss and structural degradation, preventing the formation of the layered phase. In this work, guided by the gaseous nucleation theory, we implemented several FSP processes with different solution recipes. The layered phase concentration in the as-burned products can be increased with the solution enthalpies. By adding a rapid quench step to suppress the lithium loss and phase degradation, the layered phase can be further increased. This work contributes new ideas to innovating process regarding the process efficiency and throughput of manufacturing cathode materials at a large scale. |
| Databáze: | OpenAIRE |
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