【摘要】 我们用柠檬酸辅助的溶胶法、在800℃和1000℃的最终煅烧温度下,生产高压阴极Li Ni_0.4Ru_0.05Mn_1.5O₄。通过同步加速器辐射、等离子体-发射光谱以及扫描电子显微镜分析、高分辨率粉末衍射来描绘材料的结构、化学组成及形态特点。我们通过X射线吸收光谱研究确认尖晶石内是否有钌掺杂、并比较过渡金属的氧化态。Li Ni_0.4Ru_0.05Mn_1.5O₄粉末在1000℃条件下合成,其初始容量为-139 m Ah·g^-1,在3.5⁵.0伏、C/2充电-放电率条件下,经过300次循环后容量保持率为（初始容量的）84%,这表明其大电流放电能力及循环稳定性非常好。更多还原

【Abstract】 The citric acid-assisted solegel method was used to produce the high-voltage cathodes and Li Ni_0.4Ru_0.05Mn_1.5O₄ at 800 ℃ and 1000 ℃ final calcination temperatures. High resolution powder diffraction using synchrotron radiation, inductively coupled plasma e optical emission spectroscopy and scanning electron microscopy analyses were carried out to characterize the structure, chemical composition and morphology. X-ray absorption spectroscopy studies were conducted to confirm Ru doping inside the spinel as well as to compare the oxidation states of transition metals. The Li Ni_0.4Ru_0.05Mn_1.5O₄ powder synthesized at 1000 ℃ shows the highest performance regarding the rate capability and cycling stability. It has an initial capacity of¹39 m Ah·g^-1 and capacity retention of 84 % after 300 cycles at C/2 chargingedischarging rate between 3.5 and 5.0 V.更多还原