+44-1518-081136Synthesis and electrochemical performances of polyanionic compounds for Na-ion batteries anodes
2nd International Conference on Materials Science and Engineering
February 25-26, 2019 | Paris, France
Zeyu Wang, Yue Zhao and Zhuo Deng
Soochow University, China
Posters & Accepted Abstracts : Mater Sci Nanotechnol
Abstract:
Polyanion compounds possess many advantages as Na-ion batteries anodes. For example, various crystal structures with open channels for Na-ions are available, and the polyanion compounds are believed to have high thermal stabilities due to strong covalent bonding of oxygen atom in the polyanion polyhedral. Furthermore, the reaction potentials of the compounds in the process of charging and discharging are influenced by the environment around the polyanion themselves, so we can adjust the structure of polyanion to change the reaction routes and improve the electrochemical performance. Na3V2(PO4)3 is a promising cathode material for Na-ion batteries due to the unique NASICON framework and excellent ionic conduction. On the other hand, the conductivity of Na3V2(PO4)3 is poor due to the presence of PO4 3-, therefore many works were done to improve the electro chemical performance of materials through coating amorphous carbon layer on Na3V2(PO4)3 particles or synthesizing composite with conductive graphene and soon. This work aims to seek a simple and safe route to synthesis Na3V2(PO4)3/C composite and NaVPO4 F/C composite by introducing the F- and to investigate their electrochemical performances.
Biography:
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