Synthetic optimization of spherical Li[Ni1/3Mn1/3Co1/3]O2 prepared by a carbonate co-precipitation method |
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| Authors: | S Zhang C Deng BL Fu L Ma |
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| Affiliation: | a College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China
b College of Chemistry and Chemical Engineering, Provincial Key Lab for Nano-functionalized Materials and Excitated State, Harbin Normal University, Harbin, Heilongjiang 150025, China |
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| Abstract: | A carbonate co-precipitation method was employed to prepare spherical LiNi1/3Co1/3Mn1/3]O2 cathode material. The precursor, Ni1/3Co1/3Mn1/3]CO3, was prepared using ammonia as chelating agent under CO2 atmosphere. The spherical LiNi1/3Co1/3Mn1/3]O2 was prepared by mixing the precalcined Ni1/3Co1/3Mn1/3]CO3 with LiOH followed by high temperature calcination. The preparation conditions such as ammonia concentration, co-precipitation temperature, calcination temperature and Li/Ni1/3Co1/3Mn1/3] ratio were varied to optimize the physical and electrochemical properties of the prepared LiNi1/3Co1/3Mn1/3]O2. The structural, morphological, and electrochemical properties of the prepared LiNi1/3Co1/3Mn1/3O2 were characterized by XRD, SEM, and galvanostatic charge-discharge cycling. The optimized material has a spherical particle shape and a well ordered layered structure, and it also has an initial discharge capacity of 162.7 mAh g− 1 in a voltage range of 2.8-4.3 V and a capacity retention of 94.8% after a hundred cycles. The optimized ammonia concentration, co-precipitation temperature, calcination temperature, and Li/Ni1/3Co1/3Mn1/3] ratio are 0.3 mol L− 1, 60 °C, 850 °C, and 1.10, respectively. |
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| Keywords: | Lithium ion battery Li[Ni1/3Co1/3Mn1/3]O2 Carbonate co-precipitation Layered structure Cathode material |
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