Effect of titanium substitution in layered LiNiO2 cathode material prepared by molten-salt synthesis |
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| Affiliation: | 1. School of Metallurgy and Environment, Central South University, Changsha 410083, PR China;2. Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto M5S 3E5, Canada;3. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China;2. School of Engineering, Faculty of Applied Science, The University of British Columbia, Kelowna, BC V1V 1V7, Canada;3. Shenzhen Research Institute of Wuhan University, Shenzhen, 518000, China;1. School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;2. School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;3. Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Central South University, Changsha 410083, China;4. School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia;5. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;6. College of Chemistry, Tianjin Normal University, Tianjin 300387, China;7. School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States;1. Jiangxi University of Technology, Nanchang 330098, PR China;2. Jiangxi University of Chinese Medicine, Nanchang 330004, PR China;3. Yuzhang Normal University, Nanchang 330103, PR China |
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| Abstract: | LiNi1?xTixO2 (0 ≤ x ≤ 0.1) compounds have been synthesized by a direct molten-salt method that uses a eutectic mixture of LiNO3 and LiOH salts. According to X-ray diffraction analysis, these materials have a well-developed layered structure (R3-m) and are an isostructure of LiNiO2. The LiNi1?xTixO2 (0 ≤ x ≤ 0.1) compounds have average particle sizes of 1–5 μm depending on the amount of Ti salt. Charge–discharge tests show that a LiNi1?xTixO2 (0 ≤ x ≤ 0.1) cathode prepared at 700 °C has an initial discharge capacity as high as 171 mA h g?1 and excellent capacity retention in the range 4.3–2.8 V at a current density of 0.2 mA cm?2. |
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