Lithium ion battery cathode material LiFe1-xMnxPO4/C was prepared by high temperature solid state method, and the effects of Mn modificatin on the structure, morphology and electrochemical properties of the material were researched. The results show that the olivine structure lithium manganese iron phosphate material was obtained by high temperature solid state method, and no impurity phase existed. A small amount of Mn doping does not have much influence on the structural morphology of the material, but significantly improves the electrochemical performance. When the Mn content was 0.02 (molar content), the specific discharge capacity of the material reached 154mAh/g at 0.2C rate, which is significantly higher than that of the Mn content was 0.00 (molar content). Moreover, Mn doping can effectively improve the capacity performance at high rate. And the electrochemical reaction resistance is reduced, explaining that the addition of Mn improved the electrochemical performance of the material.
In this paper, Lithium iron phosphate materials coated with conductive polymer were prepared by high temperature solid phase method. For the sake of investigating the effect of conductive polymer coating on Lithium iron phosphate materials, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), charge and discharge test, rate performance and electrochemical impedance were used to analyze the microstructure and electrochemical of the materials. The results displayed that Polypyrrole coating did not change the structure of lithium ferric manganese phosphate, and the HRTEM image can clearly showed that the polypyrrole uniformly coated on the surface of LiFe0.5Mn0.5PO4 nanorods. And the modified materials showed higher discharge capacity than the bare material.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.