Citation: TAO Hong-Liang, MI Chang-Huan, ZHANG Ying-Xia. Aqueous Li-Ion Battery Cathode Material Li_1-xNa_xMn₂O₄ Prepared by Sol-gel Method and Its Electrochemical Performance[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(7): 1147-1152. doi: 10.11862/CJIC.2017.156 shu

Aqueous Li-Ion Battery Cathode Material Li_1-xNa_xMn₂O₄ Prepared by Sol-gel Method and Its Electrochemical Performance

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

Corresponding author: MI Chang-Huan, mchmse@nuaa.edu.cn
Received Date: 24 February 2017
Revised Date: 1 June 2017

Figures(7)

The Na-doped Li_1-xNa_xMn₂O₄(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 Li_0.97Na_0.03Mn₂O₄ 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.
- aqueous Li-ion battery,
- Na-dope,
- LiMn₂O₄
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Aqueous Li-Ion Battery Cathode Material Li_1-xNa_xMn₂O₄ Prepared by Sol-gel Method and Its Electrochemical Performance