Mn3O4 with purposely tuned different morphologies, crystal structures and sizes are synthesized by hydrothermal method of varying processing temperatures, together with the help of surfactant. Systematic investigations, both by experimental and computational studies, into these Mn3O4 nanomaterials were conducted in order to find the most suitable morphology and compatible electrolyte for energy storage application. The Mn3O4 nanofibers with tunnel size of 1.83 Å in the crystal structure shows much higher volumetric capacitance (188 F cm-3 at scan rate of 1 mV s-1 of cyclic voltammetry test) than those of other two morphologies/crystal structures, when using 1M LiCl aq. as the electrolyte. It is demonstrated in this work that crystal morphology and particle size plays an important role in determining the capacitance of an electrode material. In addition, the detailed structure, especially the atomic arrangements within the crystalline structure, are crucial in order to choose the most suitable electrolyte.

中文翻译：

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Mn3O4纳米材料的可控结构转变及其对电化学性能的影响

Mn3O4可以通过改变加工温度的水热方法，在表面活性剂的帮助下合成出有意调节的不同形态，晶体结构和尺寸的Mn3O4。通过实验和计算研究对这些Mn3O4纳米材料进行了系统的研究，以便找到最适合储能应用的形态和相容的电解质。使用时，晶体结构中隧道尺寸为1.83Å的Mn3O4纳米纤维显示出比其他两种形态/晶体结构更高的体积电容（在1 mV s-1的扫描速率下为188 F cm-3）。 1M LiCl水溶液 作为电解质。这项工作表明，晶体的形态和粒径在确定电极材料的电容方面起着重要的作用。