Abstract Herein, we demonstrate a facile microwave-assisted hydrothermal synthesis of SnO2 quantum dots as an active electrode material for supercapacitor applications. The SnO2 quantum dots were synthesized at 180 °C for 30 min by varying the ratio of ethanol and water (H2O) mixture. The as-synthesized SnO2 quantum dots were found to be tetragonal rutile structures with average particle size diameter 4–6 nm. The BET analysis with an optimized solvent ratio (10:30) was found to be highest surface area of 285.5 m2/g and shows pseudocapacitive behaviour with a specific capacitance of 315 F/g at a current density of 1 A/g in a three-electrode system. In addition, all solid state asymmetric supercapacitor (ASC) device was fabricated and it exhibits excellent energy density of 62 Wh/kg at power density 1 kW/kg.

中文翻译：

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用于高性能固态非对称超级电容器的 SnO2 量子点的简便快速合成

摘要 在此，我们展示了一种简便的微波辅助水热合成 SnO2 量子点作为超级电容器应用的活性电极材料。通过改变乙醇和水 (H2O) 混合物的比例，在 180 °C 下合成 SnO2 量子点 30 分钟。发现合成的 SnO2 量子点是四方金红石结构，平均粒径为 4-6 nm。发现使用优化的溶剂比 (10:30) 进行的 BET 分析的最高表面积为 285.5 m2/g，并显示出赝电容行为，在电流密度为 1 A/g 时，比电容为 315 F/g。 -电极系统。此外，还制造了全固态非对称超级电容器 (ASC) 装置，它在功率密度为 1 kW/kg 时表现出出色的能量密度 62 Wh/kg。