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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis and characterization of Na-substituted LiMnPO4 as a cathode material for improved lithium ion batteries
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Synthesis and characterization of Na-substituted LiMnPO4 as a cathode material for improved lithium ion batteries

机译：Na-取代的LiMnPO4作为改进锂离子电池的阴极材料的合成与表征

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摘要

The present study, report the sodium (Na) substituted lithium (Li) in LiMnPO4/C structure as an active material for lithium-ion batteries, and its effect on structure, morphology and electrochemical performances. Sodium with different concentrations has been substituted in the LiMnPO4 system using the solution combustion method. The XRD analysis confirmed a pure orthorhombic structure well indexed, which confirms a good substitution of Li+ ions by Na+. A maximum discharge capacity of 136.7 mAh g(-1) was achieved for Li0.97Na0.03MnPO4/C composite cathode material compared to LiMnPO4/C (126.9 mAh g(-1)) with a coulombic efficiency of 93.8% higher than that of LiMnPO4/C (82.3%). It can be observed that the irreversible loss of capacity has been reduced by adding sodium (x = 0.03) Li0.97Na0.03MnPO4/C compared to LiMnPO4/C. With remarkable stability achieved, for the three doped samples (x = 0.01, 0.03 and 0.05 compared to x = 0.00), during the charge/discharge process. (C) 2018 Elsevier B.V. All rights reserved.
机译：本研究报告了LimnPO4 / C结构中的钠（Na）取代的锂（Li）作为锂离子电池的活性材料，其对结构，形态和电化学性能的影响。使用溶液燃烧方法在LimnPO4系统中取代了不同浓度的钠。 XRD分析证实了纯正晶粒结构良好的指数，这证实了Na +的良好取代Li +离子。与LiMnPO4 / C（126.9mAhg（-1））相比，对Li0.97Ma0.03mNPO4 / C复合阴极材料进行了136.7mAhg（-1）的最大放电容量，该库仑效率高于93.8％ LiMnPO4 / C（82.3％）。可以观察到，通过与LiMnPo4 / C相比，通过加入钠（x = 0.03）Li0.97Na0.03MNPO 4 / C，减少了不可逆的能力损失。在充电/放电过程中，对于三个掺杂样品（x = 0.03和0.05），对于三个掺杂样品（x = 0.03和0.05），在充电/放电过程中，对于X = 0.01,0.05），具有显着稳定性。 （c）2018年elestvier b.v.保留所有权利。

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