NASICON-type Na₃V₂(PO₄)₃ with a three-dimensional open framework structure has attracted wide attention, and it is regarded as one of the most promising cathode material for sodium-ion batteries. However, the low electronic conductivity restricts its charge–discharge capacity and electrochemical performance. With the purpose to solve this problem, polystyrene microspheres are applied in the preparation of cathode materials for sodium-ion batteries. Particular porous-structured Na₃V₂(PO₄)₃ composing of interlaced nanosheets is obtained samples by a simple hydrothermal-assisted sol–gel method via a self-sacrificed template (polystyrene microsphere). As expected, the as-prepared porous sample delivers a reversible capacity of 109.2 mAh g⁻¹ at 0.2 C, an excellent rate performance (89.6 mAh g⁻¹ at 50 C) and superior cyclic stability (retention of 94% over 500 cycles at 50 C). The outstanding rate and cyclic performance are attributed to its unique porous structure which is conducive to improve electron conductivity and facilitate the diffusion of sodium ions.

具有三维开放框架结构的NASICON型Na ₃ V ₂（PO ₄）₃引起了广泛关注，被认为是钠离子电池最有希望的正极材料之一。但是，低电导率限制了它的充放电容量和电化学性能。为了解决这个问题，聚苯乙烯微球被用于制备钠离子电池的正极材料。特殊的多孔结构Na ₃ V ₂（PO ₄）₃通过简单的水热辅助溶胶-凝胶法，通过自牺牲模板（聚苯乙烯微球），获得了交错的纳米片组成的样品。如预期的那样，所制备的多孔样品在0.2 C下可逆容量为109.2 mAh g ^-1，具有出色的速率性能（在50 C下为89.6 mAh g ^-1）和出色的循环稳定性（在500次循环下保留94％） 50℃）。出色的速率和循环性能归因于其独特的多孔结构，有利于提高电子电导率并促进钠离子的扩散。