Solution combustion synthesis and electrochemical properties of yttrium-doped LiMnPO_4/C cathode materials for lithium ion batteries |
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| Affiliation: | 1. Sciences and Technologies of Process Engineering Laboratory, Sidi Mohamed Ben Abdellah University, 30000, Fez, Morocco;2. Department of Material Science & Engineering, Eskisehir Technical University, 2 Eylül Campus, 26555 Tepebaşı, Eskişehir, Turkey;3. Instituto de Cerámica y Vidrio, CSIC, C/ Kelsen, 5, 28049, Madrid, Spain;1. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;2. Sunwoda Electronics Co., Ltd., Shenzhen 518107, China;3. GAC Automotive Research & Development Center, Guangzhou 511434, China;4. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;1. School of Mechanical Engineering, Jinggangshan University, Jian 343009, China;2. School of Chemistry and Chemical Engineering, Jinggangshan University, Jian 343009, China;1. K. Ramakrishnan College of Technology, Trichy, Samayapuram, 621 112, Tamil Nadu, India;2. Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea;3. Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, P.O. Box 49, DK-4000 Roskilde, Denmark;4. SRM Research Institute, Department of Chemistry, SRM University, SRM Nagar, Potheri, Kattankulathur 603 203, India;5. St. Mother Theresa Engineering College, Vagaikulam, Mudivaithanenthal Post, Thoothukudi 628 102, Tamil Nadu, India;6. Millimeter-Wave Innovation Technology (MINT) Research Center, Dongguk University-Seoul, Seoul 04620, Republic of Korea;1. College of Basic Medical Sciences, Shenyang Medical College, Shenyang 110034, People’s Republic of China;2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, People’s Republic of China;3. Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao 066004, People’s Republic of China;4. School of Materials Science and Engineering, Northeastern University, Shenyang 110004, People’s Republic of China |
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| Abstract: | Phospho-olivine pristine LiMnPO_4/C and yttrium-substituted LiMn_(1-x)Y_xPO_4/C(x=0,0.01,0.03,0.05)were synthesized by a solution combustion method.The effects of Y-doped on structure,morphology and electrochemical performances were investigated.From powder X-ray diffraction pattern,all substituted materials adopt an identical structure to that of the LiMnPO_4 olivine structure,suggesting that the yttrium ion was well inco rporated into the crystal lattice,without any changes in the host crystal structure.The electrochemical impedance spectroscopy provides clearly that yttrium-substituting reduces the charge transfer impedance and improves the lithium ion diffusion through the structure.When x=0.01,the material shows an excellent capacity and stability during charge/discharge process.The initial specific discharge capacity can reach up to 156.84 mAh/g at C/20,with a coulombic efficiency of about 96.11%,which is 14% higher than that of the pristine material.The results confirm that the cyclic stability and the electrochemical performances of LiMnPO_4/C are highly improved by Y-doping. |
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| Keywords: | Olivine material Yttrium substitution Combustion Glycine Lithium-ion battery |
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