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- W2276787467 abstract "Polypyrrole-film was formed successfully onto LiMn2O4 electrode by electrochemical polymerization, as a new method to improve cycling performance of LiMn2O4 cathode, which was quite different from cation doping and surface coating of LiMn2O4. Both of pure electrode and modified electrode were characterized by X-ray diffraction and electrochemical techniques. The XRD patterns demonstrated that crystallized polypyrrole was deposited onto the LiMn2O4 electrode. The charge-discharge tests revealed that modified electrode by polypyrrole-film had an excellent rechargeability, 98.2% of the initial discharge capacity and 90.1% of the 13th discharge capacity at C/3 rate in the voltage range of 3.5-4.3V after 150 cycles, but for pure electrode, only 53.4% of the initial discharge capacity. The CV curves showed that the new method was very efficient for restraining capacity fade of LiMn2O4, in fair agreement with the charge-discharge test. The EIS measurements in a frequency range from 100kHz to 1mHz were conducted on the electrodes. It was exhibited that the presence of polypyrrole-film decreased the charge transfer resistance and facilitated the charge-transfer reaction in the LiMn2O4 material, which is favorable for improving performance of LiMn2O4 cathode. 1 Corresponding author: ylxu@mail.xjtu.edu.cn, Tel:0086-29-82665161, mp:0086-13991815083" @default.
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- W2276787467 date "2019-12-21" @default.
- W2276787467 modified "2023-09-23" @default.
- W2276787467 title "A Novel Method to Improve Cycling Performance of LiMn2O4 Cathodes" @default.
- W2276787467 doi "https://doi.org/10.1149/1.2209357" @default.
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