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Hydrothermal synthesis of layered Li[Ni1/3Co1/3Mn1/3]O2 as positive electrode material for lithium secondary battery |
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| Authors: | Seung-Taek Myung Shinichi Komaba Naoaki Kumagai Yang-Kook Sun |
| Affiliation: | a VK Corporation, 67 Jije-Dong, Pyongtaek-City, Kyonggi-Do 450-090, South Korea b Department of Chemical Engineering, Center for Information and Communication Materials, Hanyang University, Seungdong-Gu, Seoul 133-791, South Korea c Department of Frontier Materials and Functional Engineering, Graduate School of Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate 020-8551, Japan |
| Abstract: | In attempts to prepare layered LiNi1/3Co1/3Mn1/3]O2, hydrothermal method was employed. The hydrothermal precursor, Ni1/3Co1/3Mn1/3](OH)2, was synthesized via a coprecipitation route. The sphere-shaped powder precursor was hydrothermally reacted with LiOH aqueous solution at 170 °C for 4 days in autoclave. From X-ray diffraction and scanning electron microscopic studies, it was found that the as-hydrothermally prepared powders were crystallized to layered α-NaFeO2 structure and the particles had spherical shape. The as-prepared LiNi1/3Co1/3Mn1/3]O2 delivered an initial discharge of about 110 mA h g−1 due to lower crystallinity. Heat treatment of the hydrothermal product at 800 °C was significantly effective to improve the structural integrity, which consequently affected the increase in the discharge capacity to 157 (4.3 V cut-off) and 182 mA h g−1 (4.6 V cut-off) at 25 °C with good reversibility. |
| Keywords: | Hydrothermal Coprecipitation Cathode Lithium Battery |
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