Abstract
A facile method for the surface modification of high-voltage and high-temperature LiNi0.8Co0.1Mn0.1O2 cathode materials is demonstrated. In order to prepare polypyrrole (PPy) coating LiNi0.8Co0.1Mn0.1O2 material, the facile chemical polymerization method uses Fe(III) tosylate as oxidant and ethanol as solvent to avoid the side reaction with solvent. TEM depicts that LiNi0.8Co0.1Mn0.1O2 serves as hard template and the nanoscale PPy layer grows along the surface of LiNi0.8Co0.1Mn0.1O2 during the synthesis process. Because of flocculent and nanofiber coating layer, much improved rate performance, high temperature cycling, as well as high voltage performance are obtained. Cyclic voltammetry (CV) and electrochemical impedance spectroscopic (EIS) results demonstrate that the PPy coating layer effectively alleviates the side reactions between liquid electrolytes and LiNi0.8Co0.1Mn0.1O2 surface that are highly unstable at high temperature and high charge voltage.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
