While deploying renewable energy sources and integrating them into the grid, new types of energy storage are required. Aqueous zinc-ion batteries have received extensive attention due to the merits of their low cost, environmental friendliness and high safety, which depend on the development of cathode materials. We have recently introduced a reversible intercalated cathode material with NASICON open-frame crystal structure. Here, Na_2.9V_1.9Ti_0.1(PO₄)₃@C was prepared by a simple sol-gel route to be used in aqueous zinc-ion batteries. It shows a capacity of 94.7 mA h g⁻¹ with a discharge plateau of 1.29 V in 3 mol·L⁻¹ Zn(CF₃SO₃)₂ electrolyte (at a current density of 100 mA g⁻¹). The capacity retention rate of the material after 100 cycles is as high as 82.5%, and the excellent long-cycle stability is attributed to its strong structural stability and open NASICON-type framework. Excellent electrochemical performance provides better insights for the development of aqueous zinc-ion batteries.

在部署可再生能源并将其并入电网的同时，需要新型储能。水系锌离子电池因其成本低、环境友好、安全性高等优点而受到广泛关注，这取决于正极材料的发展。我们最近推出了一种具有 NASICON 开放框架晶体结构的可逆插层阴极材料。在这里，Na _2.9 V _1.9 Ti _0.1 (PO ₄ ) ₃ @C 通过简单的溶胶-凝胶路线制备，用于水系锌离子电池。在 3 mol·L -1 ^{Zn (} CF ₃ SO₃ ) ₂电解质（在100 mA g ^-1的电流密度下）。该材料100次循环后的容量保持率高达82.5%，优异的长循环稳定性归功于其强大的结构稳定性和开放的NASICON型骨架。优异的电化学性能为水系锌离子电池的开发提供了更好的思路。