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首页> 外文期刊>RSC Advances >Facile synthesis of P2-type Na0.4Mn0.54Co0.46O2 as a high capacity cathode material for sodium-ion batteries
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Facile synthesis of P2-type Na0.4Mn0.54Co0.46O2 as a high capacity cathode material for sodium-ion batteries

机译：方便地合成P2型Na0.4Mn0.54Co0.46O2作为钠离子电池的高容量阴极材料

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摘要

Sodium-ion batteries have received great attention because of the abundant sodium resources and low cost. As a typical kind of cathode material for Na-ion batteries, sodium manganese oxides have shown great potential in cathode application due to their high specific capacity and good rate capability. Herein, we successfully synthesized P2-type Na0.4Mn0.54Co0.46O2 nanosheets via a two-step annealing route. The morphology and structural information of the Na0.4Mn0.54Co0.46O2 products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM) technologies. The electrochemical performances of Na0.4Mn0.54Co0.46O2 were measured by charge-discharge tests, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). As the cathode for Na-ion batteries, the layered Na0.4Mn0.54Co0.46O2 nanosheets showed a high second charge capacity of 194 mA h g(-1) and delivered a specific capacity of 125 mA h g(-1) at a current of 20 mA g(-1) after 60 cycles.
机译：钠离子电池由于钠资源丰富且成本低廉而受到了广泛的关注。钠锰氧化物作为钠离子电池的典型正极材料，由于其高比容量和良好的倍率性能，在正极应用中显示出巨大的潜力。在这里，我们成功地通过两步退火路线合成了P2型Na0.4Mn0.54Co0.46O2纳米片。利用X射线衍射（XRD），透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）技术对Na0.4Mn0.54Co0.46O2产物的形貌和结构信息进行了表征。 Na0.4Mn0.54Co0.46O2的电化学性能通过充放电测试，循环伏安法（CV）和电化学阻抗谱（EIS）进行测量。作为Na离子电池的阴极，层状Na0.4Mn0.54Co0.46O2纳米片表现出194 mA hg（-1）的高第二充电容量，并在电流为200 mA时提供了125 mA hg（-1）的比容量。 60个循环后20 mA g（-1）。

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