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首页> 外文期刊>Nanotechnology >A novel polyaspartate precursor method for the synthesis of LiCa_yMn_(2-y)O_4 nanoparticles for Li-ion batteries
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A novel polyaspartate precursor method for the synthesis of LiCa_yMn_(2-y)O_4 nanoparticles for Li-ion batteries

机译：一种新的聚天冬氨酸前体方法，用于合成锂离子电池LiCa_yMn_（2-y）O_4纳米粒子

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摘要

Cubic spinel LiCa_yMn_(2-y)O_4 nanoparticles were synthesized using nitrates of Li~+, Ca~(2+) and acetate of Mn~(2+) with aspartic acid as a polymerizable combustion fuel. They were dissolved in distilled water and then concentrated by heating to form a viscous resin which was transformed into a foam-like mass by drying at 120 deg C. Phase pure LiCa_yMn_(2-y)O_4 powders were obtained by combustion of these foams. The decomposition temperature of the polyaspartate precursor was investigated by TG/DTA analysis. The structural property of the synthesized LiCa_yMn_(2-y)O_4 powders was confirmed by x-ray diffraction studies. The average particle size of the synthesized powders was calculated from the x-ray data using the Scherrer equation. TEM analysis was also carried out to confirm the particle size and surface morphology of the synthesized LiCa_yMn_(2-y)O_4 powder. Finally, electrochemical charge-discharge studies were carried out by assembling 2016 type electrochemical button cells using carbon as the anode and the synthesized LiCa_yMn_(2-y)O_4 as the cathode with microporous polymer electrolyte.
机译：以Li〜+，Ca〜（2+）的硝酸盐和Mn〜（2+）的醋酸盐与天冬氨酸为可聚合燃烧燃料，合成了立方尖晶石LiCa_yMn_（2-y）O_4纳米粒子。将它们溶解在蒸馏水中，然后加热浓缩以形成粘稠的树脂，通过在120℃下干燥将其转变为泡沫状物质。通过燃烧这些泡沫，可以得到纯的LiCa_yMn_（2-y）O_4相粉末。通过TG / DTA分析研究了聚天冬氨酸前体的分解温度。通过X射线衍射研究证实了合成的LiCa_yMn_（2-y）O_4粉末的结构性质。合成粉末的平均粒径使用谢勒方程由X射线数据计算。还进行了TEM分析，以确认合成的LiCa_yMn_（2-y）O_4粉末的粒径和表面形态。最后，通过使用微孔聚合物电解质组装以碳为阳极的2016型电化学纽扣电池和合成的LiCa_yMn_（2-y）O_4作为阴极，进行了电化学充放电研究。

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