The polyanion sodium vanadium phosphate Na3V2(PO4)3 (NVP) belongs to the sodium
superionic
conductors (NASICON) material. Its NASICON structural backbone forms
a stable sodium accommodation site, and the open three-dimensional
ion transport channel is conducive to the rapid intercalation/deintercalation
of Na ions. As a cathode material for batteries, Na3V2(PO4)3 has an extremely high specific
capacity, voltage plateau, and cycle stability, meeting the requirements
of low cost and high safety. It is a large-scale energy storage material
with ideal potential and has received extensive attention. However,
the low electronic conductivity of Na3V2(PO4)3 material hinders its further application. Based
on the current demand for large-scale application of sodium-ion batteries,
this paper re-examines the effect of existing research progress on
promoting practical applications and the problems that need to be
solved in the future from the perspective of raw material cost system
and process complexity. The paper first introduces the structural
characteristics of Na3V2(PO4)3 material and the mechanism of sodium-ion intercalation/deintercalation.
Then it introduces the synthesis methods, such as the sol–gel
method, hydrothermal method, and solid-phase reaction method. In addition,
it summarizes the modification studies of Na3V2(PO4)3, including carbon coating, ion doping
and, morphology control, design of composite materials and structures
based on Na3V2(PO4)3.
Finally, it discusses the possible future development of Na3V2(PO4)3.