In this article, a new class of fluorescent supercapacitor electrode material has been developed by electro-polymerization of Rhodamine b dye in presence of Potassium Ferrocyanide on pencil graphite electrode. The morphology and surface properties of plain polymeric Rhodamine nanodots and Potassium Ferrocyanide incorporated polymeric Rhodamine nanodots were analyzed. Optical and electronic properties of Potassium Ferrocyanide incorporated polymeric Rhodamine b nanodots was found to be superior in comparison with polymeric Rhodamine b nanodots. Potassium Ferrocyanide incorporated polymeric Rhodamine b nanodots shows an enhanced specific conductance (320.0 F/g), and better rate capability 3 to 4 times higher than the plain polymeric Rhodamine b nanodots modified graphite electrodes. The electrochemical activity of the fluorescent Potassium Ferrocyanide doped polymeric Rhodamine b nanodots was found to be easily tailored by changing the concentration of Potassium Ferrocyanide. The 2:1 molar ratio (Potassium Ferrocyanide and Rhodamine b) based polymeric nanodots shows excellent specific capacitance (434.8 F g⁻¹) and fluorescent maxima 580 nm in comparison to other mixing ratios. Potassium Ferrocyanide doped polymeric Rhodamine b nanodots possess excellent rate performance, high energy density of 150.06 Wh kg⁻¹ at a power density of 900 W kg⁻¹, and robust cycling durability, with 99.5% retaining in its specific capacitance even after 6500 cycles. Even after 8 months (40,000 cycles) of testing, the performance of the supercapacitor did not degrade. The excellent performance of the investigated fluorescent nanodots as electrode material could open up the application of supercapacitors to Internet of Things (IoT) applications.

中文翻译：

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用于荧光超级电容器的金属结合聚合物纳米点基电极材料

在本文中，通过在铅笔石墨电极上在亚铁氰化钾存在下将若丹明b染料进行电聚合，开发了一种新型的荧光超级电容器电极材料。分析了普通聚合物若丹明纳米点和掺入亚铁氰化钾的聚合物若丹明纳米点的形态和表面性能。已发现掺入亚铁氰化钾的聚合物若丹明b纳米点的光学和电子性能优于聚合物若丹明b纳米点。掺入亚铁氰化钾的聚合物若丹明b纳米点显示出增强的比电导率（320.0 F / g），并且比普通的聚合物若丹明b纳米点修饰的石墨电极高3-4倍的速率能力。发现通过改变亚铁氰化钾的浓度可以容易地定制荧光亚铁氰化钾掺杂的聚合物若丹明b纳米点的电化学活性。摩尔比为2：1（亚铁氰化钾和若丹明b）的聚合物纳米点具有出色的比电容（434.8 F g^-1）和与其他混合比相比最大的荧光580 nm。掺杂亚铁氰化钾的聚合物若丹明b纳米点具有出色的速率性能，在900 W kg ^-1的功率密度下具有150.06 Wh kg ^-1的高能量密度，以及强劲的循环耐久性，即使在6500次循环后，其比电容仍可保持99.5％。即使经过8个月（40,000个循环）的测试，超级电容器的性能也不会降低。被研究的荧光纳米点作为电极材料的优异性能可以为超级电容器在物联网（IoT）应用中的应用开辟道路。