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Facile synthesis of NiCoMnO4 nanoparticles as novel electrode materials for high-performance asymmetric energy storage devices

机译：基于NicomNO4纳米粒子的纳米诺诺纳米粒子作为高性能不对称能量存储装置的新型电极材料

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In attempt to reduce the amount of toxic Co in cobalt oxides, NiCoMnO _(4) nanoparticles were synthesized via a facile hydrothermal route and their electrochemical properties have been investigated as a novel electrode material for supercapacitors. Samples have been characterized using X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), and X-ray photoelectron spectroscopy (XPS). N _(2) adsorption/desorption measurements demonstrated a high specific surface area of 175 m ~(2) g ~(?1) . The morphology of the samples has been probed with scanning (SEM) and transmission (TEM) electron microscopy. The electrochemical properties of the NiCoMnO _(4) nanoparticles have been evaluated as electrode materials for energy storage application by means of various electrochemical techniques including cyclic voltammetry, galvanostatic charge–discharge measurements, and electrochemical impedance spectroscopy. According to the obtained results, the NiCoMnO _(4) electrodes showed significant improved capacitive performance in comparison with pure oxides ( e.g. NiO, Co _(3) O _(4) , and Mn _(3) O _(4) ). The NiCoMnO _(4) electrodes with a high mass loading of ～10 mg cm ~(?2) exhibited a high specific capacitance of 510 F g ~(?1) at 1 A g ~(?1) , and a desirable rate capability (retaining 285 F g ~(?1) at 10 A g ~(?1) ). Finally, asymmetric devices based on NiCoMnO _(4) nanoparticles as positive electrodes and reduced graphene oxide nanosheets as negative electrodes were assembled, showing a remarkable performance including high energy (20 W h kg ~(?1) ), and stunning power density (37.5 kW kg ~(?1) ).
机译：为了减少钴氧化物中的毒性CO的量，通过容易水热途径合成NicomNo _（4）纳米颗粒，并研究了它们的电化学性质作为超级电容器的新型电极材料。已经使用X射线衍射（XRD），能量分散X射线分析（eDAX）和X射线光电子谱（XPS）进行了特征。 N _（2）吸附/解吸测量显示出175m〜（2）G〜（α1）的高比表面积。已经用扫描（SEM）和透射（TEM）电子显微镜探测样品的形态。通过各种电化学技术评估了NicomNo _（4）纳米颗粒的电化学性质作为能量储存施加的电极材料，包括循环伏安法，电镀电荷放电测量和电化学阻抗光谱。根据所得结果，与纯氧化物（例如，NIO，CO _（3）O _（4）和MN _（3）O _（4））相比，Nicomno _（4）电极显示出显着的改善的电容性能。 。具有〜10mg cm〜（α2）的高质量负荷的镍酯_（4）电极在1 a g〜（α1）的高比电容为510 f g〜（Δ1），以及所需的速率能力（在10 a g〜（α1）的情况下保持285 f g〜（Δ1））。最后，组装基于NicomNo _（4）纳米颗粒作为正电极的非对称装置和作为负电极的还原的石墨烯氧化物纳米片，显示出具有高能量（20WH kg〜（α1））和令人惊叹的功率密度的显着性能（ 37.5 kW kg〜（？1））。

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