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首页> 外文期刊>Chemistry: A European journal >High Performance Full Sodium-Ion Cell Based on a Nanostructured Transition Metal Oxide as Negative Electrode
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High Performance Full Sodium-Ion Cell Based on a Nanostructured Transition Metal Oxide as Negative Electrode

机译：纳米结构过渡金属氧化物为负极的高性能全钠离子电池

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摘要

A novel design of a sodium-ion cell is proposed based on the use of nanocrystalline thin films composed of transition metal oxides. X-ray diffraction, Raman spectroscopy and electron microscopy were helpful techniques to unveil the microstructural properties of the pristine nano-structured electrodes. Thus, Raman spectroscopy revealed the presence of amorphous NiO, alpha-Fe2O3 (hematite) and gamma-Fe2O3 (maghemite). Also, this technique allowed the calculation of an average particle size of 23.4 angstrom in the amorphous carbon phase in situ generated on the positive electrode. The full sodium-ion cell performed with a reversible capacity of 100 mA h g(-1) at C/2 with an output voltage of about 1.8 V, corresponding to a specific energy density of about 180 W h kg(-1). These promising electrochemical performances allow these transition metal thin films obtained by electrochemical deposition to be envisaged as serious competitors for future negative electrodes in sodium-ion batteries.
机译：基于使用由过渡金属氧化物组成的纳米晶体薄膜，提出了钠离子电池的新颖设计。 X射线衍射，拉曼光谱和电子显微镜是揭示原始纳米结构电极微观结构特性的有用技术。因此，拉曼光谱法揭示了无定形NiO，α-Fe2O3（赤铁矿）和γ-Fe2O3（磁赤铁矿）的存在。而且，该技术允许计算在正极上原位产生的无定形碳相中的平均粒径为23.4埃。完整的钠离子电池在C / 2时可逆容量为100 mA h g（-1），输出电压约为1.8 V，对应于约180 W h kg（-1）的比能量密度。这些有前途的电化学性能使通过电化学沉积获得的这些过渡金属薄膜被设想为钠离子电池中未来负极的重要竞争者。

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