超级电容器(SC),包括双电层电容器(EDLC),伪电容器,和混合电容器,以其高功率密度和有吸引力的功能,如强大的安全性,快速充电,低维护,延长循环寿命,引发了巨大的兴趣。碳量子点(CQDs)是一种小尺寸的荧光纳米材料,宽激发光谱,稳定的荧光,和可调的发射波长。它们广泛用于光电子,医学诊断,和能量储存由于它们的生物相容性,低毒性,丰富的表面官能团,丰富的电子-空穴对,大的比表面积,和可调杂原子掺杂。在这篇简短的评论中,简要讨论了自下而上和自上而下的CQD合成方法的优缺点。电弧放电技术,激光烧蚀技术,等离子体处理,超声合成技术,电化学技术,化学去角质,燃烧是最初的自上而下的方法之一。随后的部分描述了废物衍生方法和自下而上方法,包括微波合成,水热合成,热热解,以及金属有机骨架模板辅助技术。此外,这篇简短的评论集中在超级电容器的运行机制上,他们的属性,以及CQD在超级电容器中的利用。
Supercapacitors (SCs), including electric double-layer capacitors (EDLCs), pseudocapacitors, and hybrid capacitors, are esteemed for their high power density and attractive features such as robust safety, fast charging, low maintenance, and prolonged cycling lifespan, sparking significant interest. Carbon quantum dots (CQDs) are fluorescent nanomaterials with small size, broad excitation spectrum, stable fluorescence, and adjustable emission wavelengths. They are widely used in optoelectronics, medical diagnostics, and energy storage due to their biocompatibility, low toxicity, rich surface functional groups, abundant electron-hole pairs, large specific surface area, and tunable heteroatom doping. In this short review, we briefly discussed the advantages and disadvantages of bottom-up and top-down of CQD synthesis methods. The arc-discharge technique, laser ablation technique, plasma treatment, ultrasound synthesis technique, electrochemical technique, chemical exfoliation, and combustion are among the initial top-down approaches. The subsequent section delineates waste-derived and bottom-up methods, encompassing microwave synthesis, hydrothermal synthesis, thermal pyrolysis, and the metal-organic framework template-assisted technique. In addition, this short review focuses on the operational mechanism of supercapacitors, their properties, and the utilization of CQDs in supercapacitors.