Xu Ruitong, Pan Jun, Wu Bo, Li Yangguang, Wang Hong-En, Zhu Ting
School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
School of Materials Science & Engineering, Central South University, Changsha 410083, China.
Nanomaterials (Basel). 2022 Jul 18;12(14):2457. doi: 10.3390/nano12142457.
To meet the increasing demands of energy consumption, sustainable energy sources such as solar energy should be better employed to promote electrochemical energy storage. Herein, we fabricated a bifunctional photoelectrode composed of copper foam (CF)-supported zinc-nickel-copper ternary oxides in nanoarrays (CF@ZnCuNiO NAs) to promote photo-enhanced pseudocapacitive charge storage. The as-fabricated CF@ZnCuNiO NAs have shown both photosensitive and pseudocapacitive characteristics, demonstrating a synergistic effect on efficient solar energy harvest and conversion. As a result, a high areal specific capacitance of 2741 mF cm (namely 418 μAh cm) under light illumination can be calculated at 5 mA cm, which delivered photo-enhancement of 38.3% compared to that obtained without light. In addition, the photoelectric and photothermal effects of the light energy on pseudocapacitive charge storage have been preliminarily studied and compared. This work may provide some evidence on the different mechanisms of photoelectric/thermal conversion for developing solar-driven energy storage devices.
为满足日益增长的能源消耗需求，应更好地利用太阳能等可持续能源来促进电化学储能。在此，我们制备了一种由泡沫铜（CF）支撑的纳米阵列锌镍铜三元氧化物（CF@ZnCuNiO NAs）组成的双功能光电极，以促进光增强赝电容电荷存储。所制备的CF@ZnCuNiO NAs兼具光敏和赝电容特性，在高效太阳能收集和转换方面表现出协同效应。结果，在5 mA cm下光照时可计算出高达2741 mF cm（即418 μAh cm）的面积比电容，与无光照时相比，光增强率为38.3%。此外，还对光能对赝电容电荷存储的光电和光热效应进行了初步研究和比较。这项工作可能为开发太阳能驱动储能装置的光电/热转换不同机制提供一些依据。
