利用水热法合成了一种宽带近红外Na₃CrF₆荧光粉，研究了其结构、微观形貌和光致发光性能。结果表明，在435 nm激发光的照射下，Na₃CrF₆荧光粉可发出650~850 nm宽带近红外光，其峰值位于738 nm处，半高宽为95 nm；通过分析光谱数据，发现Cr³⁺在Na₃CrF₆荧光粉中的晶体场强度为1.72，处于弱晶体场环境中；298~473 K温度范围内，随着加热温度的升高，Na₃CrF₆荧光粉的发光强度缓慢下降。

Two alkali-metal sulfamates nonlinear optical (NLO) crystals, Li(NH₂SO₃) and Na(NH₂SO₃), have been obtained through the facile evaporation method. Li(NH₂SO₃) crystallizes in the polar space group Pca2₁ (No.29). The structure of Li(NH₂SO₃) can be described as a 3D network formed by [LiO₄]^7- polyhedral connecting with NH₂SO₃^- tetrahedra through corner-sharing. Na(NH₂SO₃) crystallizes in the polar space group P2₁2₁2₁ (No.19). The structure of Na(NH₂SO₃) can be described as a 3D network formed by distorted [NaO₆]^11- octahedral connecting with NH₂SO₃^- tetrahedra through corner-sharing. The UV-Vis-near-infrared spectra demonstrate that Li(NH₂SO₃) and Na(NH₂SO₃) possessed large optical band gaps of 5.25 and 4.81 eV, respectively. Powder second-harmonic generation (SHG) measurements demonstrate that the SHG intensity of Li(NH₂SO₃) and Na(NH₂SO₃) were 0.32 times and 0.31 times that of KH₂PO₄, respectively. First-principles calculations confirm the nonlinear optical performance mainly derived from the synergistic effect of amino sulfonate anions and alkali metal oxide anionic polyhedra.

钠离子电池被广泛研究用于储能应用，但实现同时具有高能量密度、稳定性和快速充放电性能的正极材料仍然是一个关键的挑战。本研究合成了一系列NASICON型Na_3.5-xMn_0.5V_1.5-xZr_x(PO₄)₃/C材料，并掺入Mn、V和Zr元素探讨其对电化学性能的影响。通过在Mn和V的基础上引入Zr，提出一种激活V⁴⁺/V⁵⁺氧化还原反应新的策略，从而提升能量密度。此外，Zr掺入通过拓宽离子通道并产生额外的钠离子空位，显著促进钠离子迁移，增强电极反应动力学和整体性能。结果表明，Na_3.4Mn_0.5V_1.4Zr_0.1(PO₄)₃/C材料表现出优异的循环稳定性，在800次循环后保持90%的容量，并具备高倍率性能(20C时，放电比容量为84 mAh∙g^-1)，显著优于原始的Na_3.5Mn_0.5V_1.5(PO₄)₃/C材料。该研究为开发高效且可持续钠离子电池提供了有效途径。