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Controllable structure transitions of Mn3O4 nanomaterials and their effects on electrochemical properties
Nanoscale Horizons ( IF 9.7 ) Pub Date : 2017-08-14 00:00:00 , DOI: 10.1039/c7nh00078b
Yating Hu 1, 2, 3 , Yu Zhang 4, 5, 6 , Du Yuan 1, 2, 3 , Xu Li 4, 5, 6 , Yongqing Cai 7, 8, 9 , John Wang 1, 2, 3
Affiliation  

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

中文翻译:

Mn 3 O 4纳米材料的可控结构转变及其对电化学性能的影响

Mn 3 O 4可以通过水热法在不同的加工温度下以及表面活性剂的帮助下合成出有意调整的不同形态,晶体结构和尺寸。通过实验和计算研究,对这些Mn 3 O 4纳米材料进行了系统研究,目的是找到最合适的形貌和与储能应用兼容的电解质。晶体结构中通道尺寸为1.83Å的Mn 3 O 4纳米纤维显示出更高的体积电容(在1 mV s -1的扫描速率下为188 F cm -3)当使用1 M LiCl水溶液时,循环伏安法测试的结果要比其他两种形态/晶体结构好。作为电解质。这项工作表明,晶体形态和粒径在确定电极材料的电容方面起着重要作用。此外,详细的结构,特别是晶体结构内的原子排列,对于选择最合适的电解质至关重要。
更新日期:2017-10-23
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