Herein, an integrated system combining solar cells with a hybrid supercapacitor for operating a homemade windmill device was assembled, achieving energy conversion, storage and utilization. As a candidate for positive electrode of hybrid supercapacitor devices, battery-like Ni(OH)₂@CuO@Cu binder-free electrode was fabricated by a two-step process at ambient temperature. CuO@Cu was prepared by chemical oxidation method to act as the supporting electrode for electrochemical deposition of Ni(OH)₂. Various deposition times (30, 50, 90, 150 and 200 s) were investigated to optimize the energy storage characteristics of the resulting Ni(OH)₂@CuO@Cu electrode materials. Among all the samples, Ni(OH)₂@CuO@Cu-150 exhibited the largest areal capacity of 7063 mC cm⁻² at 20 mA cm⁻², and was therefore chosen as the positive electrode in a hybrid supercapacitor device. Using N-doped reduced graphene oxide on nickel foam (N-rGO/NF) as the negative electrode, a hybrid supercapacitor was assembled. It displayed good flexibility, cycling stability and high areal energy density of 130.4 μWh cm⁻² at a power density of 1.6 mW cm⁻². Two hybrid supercapacitor devices were connected in series to successfully lighten up a red LED for 12 min 39 s, while three devices assembled in series were able to successfully power a three-digit digital display for 1 min 28 s. Interestingly, the hybrid supercapacitor device, charged by solar cells, further operated a homemade windmill device for 59 s, achieving sunlight-powered integration system. All of the findings suggested the practical application potential of the hybrid supercapacitor based on Ni(OH)₂@CuO@Cu composite as energy storage device.

在此，组装了将太阳能电池与混合超级电容器组合在一起以操作自制风车装置的集成系统，从而实现了能量转换，存储和利用。作为混合超级电容器装置正电极的候选材料，在环境温度下通过两步工艺制造了电池状的Ni（OH）₂ @ CuO @ Cu无粘结剂电极。采用化学氧化法制备了CuO @ Cu，作为电化学沉积Ni（OH）₂的支撑电极。研究了各种沉积时间（30、50、90、150和200 s），以优化所得Ni（OH）₂ @ CuO @ Cu电极材料的储能特性。在所有样品中，Ni（OH）₂@ CuO @ Cu-150在20mA cm ^-2处表现出最大的7063mC cm ^-2的面积容量，因此被选作混合超级电容器装置中的正电极。使用在泡沫镍（N -rGO / NF）上的N掺杂还原氧化石墨烯作为负极，组装了混合超级电容器。它在1.6 mW cm ^-2的功率密度下显示出良好的柔韧性，循环稳定性和130.4μWhcm ^-2的高面能量密度。串联连接了两个混合超级电容器设备，以成功点亮红色LED持续12分钟39 s，而串联组装的三个设备则能够成功地为三位数字显示器供电，持续了28分钟1 min。有趣的是，由太阳能电池充电的混合超级电容器设备进一步使自制的风车设备运行了59 s，从而实现了由阳光驱动的集成系统。所有的发现表明，基于Ni（OH）₂ @ CuO @ Cu复合材料作为储能装置的混合超级电容器的实际应用潜力。