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| Aqueous Li-Ion Battery Cathode Material Li1-xNaxMn2O4 Prepared by Sol-gel Method and Its Electrochemical Performance |
| Author Name | Affiliation | E-mail | | TAO Hong-Liang | College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing 210016, China | | | MI Chang-Huan | College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing 210016, China | mchmse@nuaa.edu.cn | | ZHANG Ying-Xia | College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing 210016, China | |
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| Abstract: The Na-doped Li1-xNaxMn2O4(x=0,0.01,0.03,0.05) was successfully synthesized by a sol-gel method.X-ray diffraction showed Na is successfully doped into LiMn2O4 structure.SEM images showed the material is a uniform particle with 100~300 nm particle size.Galvanostatic charge/discharge results show the discharge capacity retention of Li0.97Na0.03Mn2O4 after 100 cycles at 2C was increased from 51.2% to 84.1% compared with that of undoped LiMn2O4.The results of cyclic voltammetry indicate that Na doping reduced the polarization and increased the diffusion coefficient of lithium ions.When the current density is increased to 10C,the doped sample still has a discharge capacity at 79.0 mAh·g-1,which is higher than that of the undoped sample (52.1 mAh·g-1).Na doping can stabilize the material structure and improve the diffusion coefficient of lithium ions,thereby improving the electrochemical properties of LiMn2O4,is a viable modification method. |
| Keywords: aqueous Li-ion battery Na-dope LiMn2O4 |
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| TAO Hong-Liang,MI Chang-Huan,ZHANG Ying-Xia.Aqueous Li-Ion Battery Cathode Material Li1-xNaxMn2O4 Prepared by Sol-gel Method and Its Electrochemical Performance[J].Chinese Journal of Inorganic Chemistry,2017,33(7):1147-1152. |
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