Reliable, low-cost electrocatalysts of La and Ni co-doped LiMn₂O₄ for energy storage applications were successfully synthesized via the sol-gel method. Herein, the effect of La³⁺ and Ni²⁺ co-doping in Mn³⁺ of LiMn_2−x(LaNi)_xO₄ (x = 0, 0.01, 0.02, 0.03, 0.04 and 0.05) samples were studied. X-ray diffraction (XRD) results for structural characterization established the cubic spinel structure of the materials. Microstructural studies of the synthesized materials via field emission scanning electron microscopy (FE-SEM) revealed that the particle size was reduced with La³⁺and Ni²⁺ doping. The electrochemical properties that were investigated in the voltage range of 0.2–1.2 V showed improved structural stability, and therefore Jahn–Teller distortion was effectively suppressed. Cyclic voltammetry (CV) revealed that a 4% substitution of (La and Ni) in Mn³⁺ exhibited improved lithium-ion reversibility. Electrochemical impedance spectroscopy (EIS) showed an improved charge transfer resistance of 41 Ω for (LaNi) 0.04 doping over other doping concentrations and pure LiMn₂O₄. Charge-discharge studies revealed that the initial discharge capacity of LiMn_1.92(LaNi)_0.04O₄ is 132.1 mAh/g in aqueous Li₂SO₄ electrolyte is improved over other doping concentrations and pristine LiMn₂O₄.

通过溶胶-凝胶法成功合成了用于储能应用的可靠、低成本的 La 和 Ni 共掺杂 LiMn ₂ O ₄电催化剂。在此，研究了La ³⁺和Ni ²⁺共掺杂在LiMn _{2- x} (LaNi) _x O ₄ ( x = 0、0.01、0.02、0.03、0.04和0.05)样品的Mn ^{3+ 中}的影响。用于结构表征的 X 射线衍射 (XRD) 结果确定了材料的立方尖晶石结构。通过场发射扫描电子显微镜 (FE-SEM) 对合成材料的微观结构研究表明，La ³⁺使粒径减小和 Ni ²⁺掺杂。在 0.2-1.2 V 电压范围内研究的电化学性能显示出改善的结构稳定性，因此有效抑制了 Jahn-Teller 畸变。循环伏安法 (CV) 表明，Mn ³⁺中（La 和 Ni）的 4% 取代表现出改善的锂离子可逆性。电化学阻抗谱 (EIS) 表明 (LaNi) 0.04 掺杂比其他掺杂浓度和纯 LiMn ₂ O ₄提高了 41 Ω 的电荷转移电阻。充放电研究表明，LiMn _1.92 (LaNi) _0.04 O ₄在 Li ₂ SO水溶液中的初始放电容量为 132.1 mAh/g₄电解质优于其他掺杂浓度和原始 LiMn ₂ O ₄。