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Optimization of microwave synthesis of Li[Ni0.4Co0.2Mn0.4]O2 as a positive electrode material for lithium batteries |
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| Authors: | Ki-Soo Lee Jai Prakash Yang-Kook Sun |
| Affiliation: | a Department of Chemical Engineering, Center for Information and Communication Materials, Hanyang University, Seoul 133-791, Republic of Korea b Department of Chemical Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan c Department of Chemical and Biological Engineering, Illinois Institute of Technology, 10 West 33rd Street, Chicago, IL, USA |
| Abstract: | A positive electrode material for lithium ion battery applications was successfully synthesized using microwave irradiation. This microwave synthesis has several merits such as homogeneity of final product and much shorter reaction time compared to conventional synthetic methods. We synthesized spherical [Ni0.4Co0.2Mn0.4](OH)2 as a precursor by a co-precipitation method. The pelletized mixture of the precursor and lithium hydroxide was calcined under different reaction times and temperatures by applying 1200 W of microwave irradiation at 2.45 GHz. We determined the optimum conditions of microwave synthesis for positive electrode materials. The powders were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical testing. The capacity, its retention, and thermal stability of Li[Ni0.4Co0.2Mn0.4]O2 synthesized by the microwave synthesis were comparable to the Li[Ni0.4Co0.2Mn0.4]O2 prepared by the high temperature calcination method. |
| Keywords: | Microwave Hydroxide Li[Ni0.4Co0.2Mn0.4]O2 Positive Electrode Lithium Battery |
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