钼酸钴纳米复合储氢电极材料的制备、微观结构特征及电化学性能,Journal of Energy Storage

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钼酸钴纳米复合储氢电极材料的制备、微观结构特征及电化学性能
Journal of Energy Storage ( IF 8.9 ) Pub Date : 2024-02-23 , DOI: 10.1016/j.est.2024.111027
Foroozan Samimi , Maryam Ghiyasiyan-Arani , Makarim A. Mahdi , Layth S. Jasim , Abolfazl Fathollahi Zonouz , Masoud Salavati-Niasari

使用熔盐技术开发了基于钼酸钴化合物的电极材料，用于电化学储氢（EHS）。正如场发射扫描电子显微镜所见，已经创建了基于花形纳米板的结构。在合成过程中，比较了不同共晶盐组合和活性炭用量的效果。这些条件导致制备具有不同相纯度和形态的样品。此外，还从所得样品的 X 射线衍射图案中得出有关微观结构特性、微晶尺寸和应变的详细信息。在本研究中，收集三电极电池，施加1毫安充放电电流的恒电流循环，并分析氢吸附和解吸活性的循环伏安图。使用最纯净形式的钼酸钴结构来比较 CoMoO (520 mAhg) 与 CoMoO/CoMoO/ZnMoO (800 mAhg) 和 CoMoO/MoO (530 mAhg) 代表性复合材料的储氢容量。 CoMoO性能的增强可能有助于加强其在电化学储氢领域的应用。

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Preparation, microstructural characteristics, and electrochemical properties of cobalt molybdate nanocomposites as electrode material for hydrogen storage

Electrode materials based on cobalt molybdate compounds were developed using the molten salt technique for electrochemical hydrogen storage (EHS). Flowers-shaped nanoplate-based structures have been created, as seen by field emission scanning electron microscopes. In the process of synthesis, a comparison was made between the effects of utilizing various combinations of eutectic salts and amounts of activated carbon. These conditions led to preparation of samples with different phase purities and morphologies. Also, the detailed information derived from X-ray diffraction patterns of resultant samples in terms of microstructural properties, crystallite size and strain. In the present study, three-electrode cells were collected, galvanostatic cycling was applied with a one milliampere charge-discharge current, and cyclic voltammograms of hydrogen adsorption and desorption activities were analyzed. Cobalt molybdate structures in their purest form were used to make a comparison between the hydrogen storage capacities of CoMoO (520 mAhg) and representative composites of CoMoO/CoMoO/ZnMoO (800 mAhg), and CoMoO/MoO (530 mAhg). It is possible that the enhancements in performance of CoMoO will help to the strengthening of its use in the field of electrochemical hydrogen storage.

更新日期：2024-02-23

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