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Journal of Materials Science and Nanotechnology | Volume 3
February 25-26, 2019 | Paris, France
Materials Science and Engineering
2
nd
International Conference on
Synthesis and electrochemical performances of polyanionic compounds for Na-ion batteries anodes
Zeyu Wang, Yue Zhao
and
Zhuo Deng
Soochow University, China
P
olyanion 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. Na
3
V
2
(PO
4
)
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 Na
3
V
2
(PO
4
)
3
is poor due to the presence of PO
4
3-
, therefore
many works were done to improve the electro chemical
performance of materials through coating amorphous carbon
layer on Na
3
V
2
(PO
4
)
3
particles or synthesizing composite
with conductive graphene and soon. This work aims to
seek a simple and safe route to synthesis Na
3
V
2
(PO
4
)
3
/C
composite and NaVPO
4
F/C composite by introducing the
F
-
and to investigate their electrochemical performances.
e:
wangzeyu16suda@163.com