Nagaraju Goli, Sekhar S Chandra, Ramulu Bhimanaboina, Yu Jae Su
Department of Electronic Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, 1732 Deogyeong-daero, Gihung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
Department of Chemical Engineering, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Gihung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
Small. 2019 Apr;15(16):e1805418. doi: 10.1002/smll.201805418. Epub 2019 Mar 20.
Self-powered charging systems in conjunction with renewable energy conversion and storage devices have attracted promising attention in recent years. In this work, a prolific approach to design a wind/solar-powered rechargeable high-energy density pouch-type hybrid supercapacitor (HSC) is proposed. The pouch-type HSC is fabricated by engineering nature-inspired nanosliver (nano-Ag) decorated Ni Co S forest-like nanostructures on Ni foam (nano-Ag@NCS FNs/Ni foam) as a battery-type electrode and porous activated carbon as a capacitive-type electrode. Initially, the core-shell-like NCS FNs/Ni foam is prepared via a single-step wet-chemical method, followed by a light-induced growth of nano-Ag onto it for enhancing the conductivity of the composite. Utilizing the synergistic effects of forest-like nano-Ag@NCS FNs/Ni foam as a composite electrode, the fabricated device shows a maximum capacitance of 1104.14 mF cm at a current density of 5 mA cm and it stores superior energy and power densities of 0.36 mWh cm and 27.22 mW cm , respectively along with good cycling stability, which are higher than most of previous reports. The high-energy storage capability of HSCs is further connected to wind fans and solar cells to harvest renewable energy. The wind/solar charged HSCs can effectively operate various electronic devices for a long time, enlightening its potency for the development of sustainable energy systems.
近年来，结合可再生能源转换和存储设备的自供电充电系统引起了广泛关注。在这项工作中，提出了一种设计风力/太阳能供电的可充电高能量密度软包型混合超级电容器（HSC）的丰富方法。该软包型HSC通过在泡沫镍上设计受自然启发的纳米银（nano-Ag）修饰的Ni-Co-S森林状纳米结构（nano-Ag@NCS FNs/泡沫镍）作为电池型电极，并以多孔活性炭作为电容型电极来制备。首先，通过一步湿化学方法制备核壳状NCS FNs/泡沫镍，然后在其上进行光诱导生长纳米银以提高复合材料的导电性。利用森林状nano-Ag@NCS FNs/泡沫镍作为复合电极的协同效应，所制备的器件在电流密度为5 mA cm时显示出最大电容为1104.14 mF cm，并且分别存储了0.36 mWh cm和27.22 mW cm的优异能量和功率密度，同时具有良好的循环稳定性，这高于大多数先前的报道。HSCs的高能量存储能力进一步与风扇和太阳能电池相连，以收集可再生能源。风力/太阳能充电的HSCs可以长时间有效地运行各种电子设备，这表明其在可持续能源系统开发中的潜力。
