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首页> 外文期刊>International Journal of Electrochemical Science >Performance of LiCuxMn2-xO4(0≤x≤0.10) Cathode Materials Prepared by a Fameless Combustion Synthesis
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Performance of LiCuxMn2-xO4(0≤x≤0.10) Cathode Materials Prepared by a Fameless Combustion Synthesis

机译：无焰燃烧合成制备的LiCuxMn 2-x O 4 （0≤x≤0.10）阴极材料的性能

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摘要

Copper-doped lithium manganese spinel LiCuxMn2-xO4 (0 x 0.10) as lithium ion cathode materialwere synthesized by a fameless combustion synthesis at 500 C for 3 h, two-stage calcination at600 C for 3 h. The phase composition was determined by X-ray diffraction (XRD), which indicatedthat all samples exhibited a single spinel structure except that LiCu0.08Mn1.92O4 had a little impurity ofMn3O4. Micro-morphology of the materials were characterized by scanning electron microscopy(SEM), suggesting particle size of samples was nearly uniform when copper-doped amount x rangedfrom 0 to 0.06, the particle of LiCu0.08Mn1.92O4 and LiCu0.10Mn1.90O4 more seriously agglomeratedtogether than that of other samples. The cycle performance tests indicated that the sample. -1 th LiCu0.06Mn1.94O4 had the highest initial discharge specific capacity of 128.1 mA h g and the 150capacity retention was 70.1% at 0.2 C rate. Cyclic voltammetry and electrochemical impedancespectroscopy of the sample LiCu0.06Mn1.94O4 illustrated that appropriate copper-doped modificationcan improve electrochemical reversibility as well as suppress electrochemical impedance.
机译：通过无火焰燃烧合成，在500℃下燃烧3 h，在600℃下煅烧3 h，合成了锂离子掺杂的铜掺杂锂锰尖晶石LiCuxMn2-xO4（0 x 0.10）。通过X射线衍射（XRD）确定相组成，这表明除了LiCu0.08Mn1.92O4具有少量的Mn3O4杂质外，所有样品均表现出单一的尖晶石结构。通过扫描电子显微镜（SEM）表征了材料的微观形貌，表明当铜掺杂量x在0至0.06之间时，样品的粒度几乎均匀，LiCu0.08Mn1.92O4和LiCu0.10Mn1.90O4的颗粒更多。严重凝聚在一起比其他样品。循环性能测试表明该样品。 -1th LiCu0.06Mn1.94O4的最高初始放电比容量为128.1 mA h g，在0.2 C速率下的150容量保持率为70.1％。样品LiCu0.06Mn1.94O4的循环伏安法和电化学阻抗谱表明，适当的铜掺杂改性可以改善电化学可逆性并抑制电化学阻抗。

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