首页> 外文期刊>International Journal of Electrochemical Science >Effect of Sintering time on Mn3+/Mn4+ Ratio and Rate Capability of Spinel Li1.02Mn2O4
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Effect of Sintering time on Mn3+/Mn4+ Ratio and Rate Capability of Spinel Li1.02Mn2O4

机译:烧结时间对尖晶石Li 1.02 Mn 2 Mn 3 + / Mn 4 + 比和速率性能的影响O 4

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The spinel Li1.02Mn2O4 samples were synthesized at different sintering times (5 h, 10 h, 15 h, and 20 h)via a solid-state method. The Mn4+ content decreases from 84.32% to 77.52% as the synthesis timeincreases from 5 h to 20 h, as indicated by Mn 2p3/2 X-ray photoelectron spectra. The rate capability ofLi1.02Mn2O4 samples increased initially and then decreased as synthesis time increased from 5 h to 20h. Our results show that Li1.02Mn2O4 sample synthesized for 10 h has the best rate capabilities of 144.1mAh/g, 138.2 mAh/g, 126 mAh/g, and 106.2 mAh/g at 0.1, 0.2, 0.5, and 1 C, respectively. We suggestthat change in rate capability of the Li1.02Mn2O4 samples with increased synthesis time is related to themodification of Mn4+ content in LiMn2O4.
机译:通过固态法在不同的烧结时间(5 h,10 h,15 h和20 h)合成了尖晶石Li1.02Mn2O4样品。如Mn 2p3 / 2 X射线光电子能谱所示,随着合成时间从5 h增加到20 h,Mn4 +含量从84.32%降低到77.52%。 Li1.02Mn2O4样品的速率能力随着合成时间从5小时增加到20小时而先增加然后降低。我们的结果表明,合成10小时的Li1.02Mn2O4样品在0.1、0.2、0.5和1 C下的最佳速率分别为144.1mAh / g,138.2 mAh / g,126 mAh / g和106.2 mAh / g。 。我们认为随着合成时间的增加,Li1.02Mn2O4样品速率能力的变化与LiMn2O4中Mn4 +含量的改变有关。

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