Yurii V. Shmatok, Nataliya I. Globa, Vitalii A. Sirosh, Iryna V. Romanova, Sviatoslav A. Kirillov
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引用次数: 0
摘要
通过柠檬酸辅助路线合成了成分为 LiFe0.05Mn1.95O4 的掺铁锂锰尖晶石。通过 XRD 和 SEM 方法研究了退火温度对 LiFe0.05Mn1.95O4 结构和形态特征的影响。利用电静态循环法和循环伏安法研究了 LiFe0.05Mn1.95O4 在有机和水性电解质溶液中的电化学特性和动力学特性。在 700、750 和 800 °C 温度下退火的 LiFe0.05Mn1.95O4样品在 0.5 C 循环电流密度下的比容量分别为 114、102 和 109 mAh g-1。在 750 °C 下退火的样品在放电电流达到 50 C 时获得了最佳的循环稳定性和速率性能。
LiFe0.05Mn1.95O4 as a high-rate cathode material for lithium-ion batteries
Fe-doped lithium-manganese spinel of the composition LiFe0.05Mn1.95O4 was synthesized by means of a citric acid-aided route. The influence of annealing temperature on structural and morphological characteristics LiFe0.05Mn1.95O4 is investigated by XRD and SEM methods. Specific and kinetic electrochemical characteristics of LiFe0.05Mn1.95O4 in organic and aqueous electrolyte solutions were studied by galvanostatic cycling method and cyclic voltammetry. LiFe0.05Mn1.95O4 samples annealed at temperatures of 700, 750, and 800 °C demonstrate specific capacity of 114, 102, and 109 mAh g−1 at the cycling current density of 0.5 C, respectively. The best cycling stability and rate performance with discharge currents up to 50 C were obtained in a case of the sample annealed at 750 °C.
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