Nanostructures of phosphorus doped and undoped LiMn₂O₄ have been obtained through the thermal decomposition of different citrate precursors. The oxides have been characterized by XRD, XPS, ⁷Li-NMR-MAS, STEM and electrochemical tests in aqueous electrolyte. XPS showed that no pyrophosphate species were formed during the doping process. The position of the phosphorus in the LiMn₂O₄ nanostructure were elucidated on both samples through analyses of STEM images and structural refinement using the Rietveld method. These analyses allowed to set the P in a 48f position with coordinates (1/8, 1/8, 0.338) at the crystalline structure of the LiMn₂O₄ spinel. Electrochemical tests corroborated the improvement of electrochemical properties of the oxide when phosphorus is used as dopant. XRD measurements on cycled electrodes showed the inhibition of segregated collateral phases during the cycling process. That allows to propose an explanation of the achieved advantages of doping the lithium manganese oxide spinel structure on the ground of the phosphorous position in the LiMn₂O₄ crystalline cell.

通过不同柠檬酸盐前体的热分解，获得了掺磷和不掺磷的LiMn ₂ O _4的纳米结构。通过XRD，XPS，⁷ Li-NMR-MAS，STEM和在水性电解质中的电化学测试对氧化物进行了表征。XPS显示在掺杂过程中没有形成焦磷酸盐。通过对STEM图像的分析和使用Rietveld方法对结构进行细化，可以阐明两个样品中LiMn ₂ O ₄纳米结构中磷的位置。这些分析允许将Li设置在LiMn ₂ O ₄晶体结构的48f位置，坐标为（1/8，1/8，0.338）。尖晶石。当使用磷作为掺杂剂时，电化学测试证实了氧化物电化学性能的改善。在循环电极上的XRD测量表明，在循环过程中，偏析的副相被抑制。这允许提出对在LiMn ₂ O ₄晶胞中磷位置的基础上掺杂锂锰氧化物尖晶石结构的已实现优点的解释。