| Synthesis and characterization of LiNi0.95-xCoxAl0.05O2 for lithium-ion batteries |
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| 作者姓名： | ZHU Xianjun ZHAN Hui LIU Hanxing ZHOU Yunhong |
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| 作者单位： | [1]State Key Laboratory of Advanced Technology and Processing for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan430070, China [2]College of Chemical and Molecular Science, Wuhan University, Wuhan 430072, China |
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| 摘 要： | Samples of LiNi0.95-xCoxAl0.05O2 （x = 0.10 and 0.15） and LiNiO2, synthesized by the solid-state reaction at 725℃ for 24 h from LiOH-H2O, Ni2O3, Co2O3, and AI（OH）3 under an oxygen stream, were characterized by TG-DTA, XRD, SEM, and electrochemical tests. Simultaneous doping of cobalt and aluminum at the Ni-site in LiNiO2 was tried to improve the cathode performance for lithium-ion batteries. The results showed that co-doping （especially, 5 at.% A1 and 10 at.% Co） definitely had a large beneficial effect in increasing the capacity （186.2 mA.h/g of the first discharge capacity for LiNio.s.42OoaoAlo.0502） and cycling behavior （180.1 mA-h/g after 10 cycles for LiNio.85CooaoAlo.osO2） compared with 180.7 mA.h/g of the first discharge capacity and 157.7 mA.h/g of the tenth discharge capacity for LiNiO2, respectively. Differen- tial capacity versus voltage curves showed that the co-doped LiNio.95_xCoxmlo.osO2 had less intensity of the phase transitions than the pristine LiNiO2.
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| 关 键 词： | LiNi0.95-xCoxAl0.05O2 电化学 锂离子电池 共掺杂 阳极材料 LiNiO2 |
| 收稿时间： | 2005-07-01 |
Synthesis and characterization of LiNi0.95-xCoxAl0.05O2 for lithium-ion batteries |
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| ZHU Xianjun ZHAN Hui LIU Hanxing ZHOU Yunhong.Synthesis and characterization of LiNi0.95-xCoxAl0.05O2 for lithium-ion batteries[J].Rare Metals,2006,25(4):303-308. |
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| Authors: | ZHU Xianjun ZHAN Hui LIU Hanxing ZHOU Yunhong |
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| Affiliation: | 1. State Key Laboratory of Advanced Technology and Processing for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. College of Chemical and Molecular Science, Wuhan University, Wuhan 430072, China;1. Key Laboratory of Materials Design and Preparation Technology of Hunan Province, School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan, China;2. Key Laboratory of Low Dimensional Materials & Application Technology (Ministry of Education), School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan 411105, China;3. Hunan Key Laboratory for Computation and Simulation in Science and Engineering, School of Mathematics and Computational Science, Xiangtan University, Xiangtan 411105, Hunan, China;4. School of Chemistry, Xiangtan University, Xiangtan 411105, Hunan, China;1. CAS Key Laboratory for Nanosystems and Hierarchical Fabrication, Nanofabrication Laboratory, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, PR China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Department of Chemistry, School of Science, Beijing Jiaotong University, Beijing 100044, PR China;1. State Key Laboratory of Mechanics and Control of Mechanical Structure, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;2. College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China;3. Department of Physics, Soochow University, Soochow, 215006, China |
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| Abstract: | Samples of LiNi0.95-xCoxAl0.05O2 (x = 0.10 and 0.15) and LiNiO2, synthesized by the solid-state reaction at 725℃ for 24 h from LiOH·H2O, Ni2O3, Co2O3, and Al(OH)3 under an oxygen stream, were characterized by TG-DTA,XRD, SEM, and electrochemical tests. Simultaneous doping of cobalt and aluminum at the Ni-site in LiNiO2 was tried to improve the cathode performance for lithium-ion batteries. The results showed that co-doping (especially, 5 at.% Al and 10at.% Co) definitely had a large beneficial effect in increasing the capacity (186.2 Ma·h/g of the first discharge capacity for LiNi0.85Co0.10Al0.05O2) and cycling behavior (180.1 Ma·h/g after 10 cycles for LiNi0.85Co0.10Al0.05O2) compared with 180.7mA·h/g of the first discharge capacity and 157.7 Ma·h/g of the tenth discharge capacity for LiNiO2, respectively. Differential capacity versus voltage curves showed that the co-doped LiNi0.95-xCoxAl0.05O2 had less intensity of the phase transitions than the pristine LiNiO2. |
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| Keywords: | electrochemistry LiNi0 95-xCoxAl0 05O2 lithium-ion batteries co-doping cathode materials LiNiO2 |
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