The compound NaFe₂(PO₄)(SO₄)₂ is successfully synthesized via a solid state reaction route and its crystal structure is determined using powder X-ray diffraction data. NaFe₂(PO₄)(SO₄)₂ phase is also characterized by cyclic voltammetry, galvanostatic cycling and electrochemical impedance spectroscopy. NaFe₂(PO₄)(SO₄)₂ crystallizes with the well-known NASICON-type structure. SAED and HRTEM experiments confirm the structural model, and no ordering between the PO₄⁻³ and SO₄⁻² polyanions is detected. The electrochemical tests indicate that NaFe₂(PO₄)(SO₄)₂ is a 3 V sodium intercalating cathode. The electrical conductivity is relatively low (2.2 × 10⁻⁶ Scm⁻¹ at 200 °C) and the obtained activation energy is ∼0.60eV. The GITT experiments indicate that the diffusivity values are in the range of 10⁻¹¹-10⁻¹² cm²/s within the measured sodium concentrations.

通过固态反应路线成功合成了化合物NaFe ₂（PO ₄）（SO ₄）_2，并使用粉末X射线衍射数据确定了其晶体结构。NaFe ₂（PO ₄）（SO ₄）₂相的特征还在于循环伏安法，恒电流循环和电化学阻抗谱。NaFe ₂（PO ₄）（SO ₄）₂以众所周知的NASICON型结构结晶。SAED和HRTEM实验证实了结构模型，并且PO ₄ ^-3和SO ₄之间没有排序检测到^-2个聚阴离子。电化学测试表明NaFe ₂（PO ₄）（SO ₄）₂是3 V钠嵌入阴极。电导率相对较低（200°C下为2.2×10 ^-6 Scm ^-1），并且获得的活化能为〜0.60eV。GITT实验表明，在测得的钠浓度范围内，扩散率值在10 ^-11 -10 ^-12  cm ² / s的范围内。