Morphology and particle growth of Mn-based carbonate precursor in the presence of ethylene glycol for high-capacity Li-rich cathode materials
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Mn-based carbonate precursor (Ni0.15Co0.15Mn0.7CO3) is synthesized by the carbonate precipitation in the presence of ethylene glycol. The nucleation and growth of precursor particles are investigated during the precipitation process by monitoring particle morphologies and structures. Primarily irregular-shaped and micron-sized loose agglomerate particles are formed and then the particles grow gradually and continue to aggregate with a round shape. After 3.5 h, obvious segregation is observed within the agglomerations. Finally, the particles obtained after aging overnight have a spherical shape and dispersed with a narrow size distribution. The additive of ethylene glycol shows significant effects on the morphology of the prepared Ni0.15Co0.15Mn0.7CO3 and the electrochemical performance of lithiated Li1.2Ni0.12Co0.12Mn0.56O2.
KeywordsMn-based carbonate precursor Cathode material Li-rich material Ethylene glycol Li-ion battery
The work was supported by the National Natural Science Foundation of China (Nos. 51662010, 51364009, 51262008, 51472107, and 51672104), the Educational Commission of Hunan Province, China (Nos. 16B209 and 16B190), the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology (the 2011 Plan of Hunan Province), the Research Foundation of Jishou University of Hunan Province, China (Nos. JDLF2016010, 15JDY024, JDSTLY1503, JDZ201503, 201520, and JDST201508), the Aid program (Environment and Energy Materials and Deep Processing of Mineral Resources in Wuling Mountain) for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province (2014), and the Planned Science and Technology Project of Science and Technology Bureau of Xiangxi Tujia and Miao Autonomous Prefecture.
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