Kalimuldina Gulnur, Nurpeissova Arailym, Adylkhanova Assyl, Issatayev Nurbolat, Adair Desmond, Bakenov Zhumabay
Department of Mechanical and Aerospace Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Nur-Sultan 010000, Kazakhstan.
National Laboratory Astana, Nazarbayev University, Kabanbay Batyr Ave. 53, Nur-Sultan 010000, Kazakhstan.
Materials (Basel). 2021 Mar 26;14(7):1615. doi: 10.3390/ma14071615.
Conductive and flexible CuS films with unique hierarchical nanocrystalline branches directly grown on three-dimensional (3D) porous Cu foam were fabricated using an easy and facile solution processing method without a binder and conductive agent for the first time. The synthesis procedure is quick and does not require complex routes. The structure and morphology of the as-deposited CuS/Cu films were characterized by X-ray diffraction and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and transmission electron spectroscopy, respectively. Pure crystalline hexagonal structured CuS without impurities were obtained for the most saturated S solution. Electrochemical testing of CuS/Cu foam electrodes showed a reasonable capacity of 450 mAh·g at 0.1 C and excellent cyclability, which might be attributed to the unique 3D structure of the current collector and hierarchical nanocrystalline branches that provide fast diffusion and a large surface area.
首次采用一种简便的溶液处理方法，在无粘结剂和导电剂的情况下，在三维（3D）多孔铜泡沫上直接制备了具有独特分级纳米晶分支的导电且柔性的硫化铜薄膜。合成过程快速，无需复杂路线。分别通过X射线衍射、扫描电子显微镜结合能量色散X射线光谱以及透射电子光谱对沉积后的硫化铜/铜薄膜的结构和形貌进行了表征。对于最饱和的硫溶液，获得了无杂质的纯结晶六方结构硫化铜。硫化铜/铜泡沫电极的电化学测试表明，在0.1 C时具有450 mAh·g的合理容量和优异的循环稳定性，这可能归因于集流体独特的三维结构和提供快速扩散及大表面积的分级纳米晶分支。
