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Efficient Energy Storage by an Asymmetric Poly(3,4-propylenedioxythiophene)//CMK-3 Supercapacitor
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-02-20 , DOI: 10.1021/acsapm.9b01081 Sathish Deshagani 1 , Aparajita Das 1 , Devadutta Nepak 1 , Melepurath Deepa 1
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-02-20 , DOI: 10.1021/acsapm.9b01081 Sathish Deshagani 1 , Aparajita Das 1 , Devadutta Nepak 1 , Melepurath Deepa 1
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Poly(3,4-propylenedioxythiophene) (PProDOT) and ordered mesoporous carbon (CMK-3) as positive and negative electrodes are assembled into an asymmetric supercapacitor (ASC), along with a gel electrolyte containing an ionic lqiuid, for the very first time. The advantages of PProDOT include charge storage by a Faradaic reaction, large electrical conductivity of 11 mS cm–1 in the doped state, robust microstructure that can endure long-term cycling, and ease of scale-up in the form of a thin coating. CMK-3 has the advantage of a porous meso-channelled morphology that enables rapid propagation of electrolyte ions with an effective surface area of 898 m2 g–1, maximizing electrical double layer formation, and a conductivity of ∼12 mS cm–1, which results in a wide operational voltage range of 2 V, an areal specific capacitance (SC) of 294 mF cm–2, an energy density of 0.16 to 0.11 mWh cm–2 at a power density of 0.86 to 3.98 mW cm–2, slow self-discharge rate, low leakage current, and a 98% SC retention after 5000 cycles for the PProDOT//CMK-3 ASC. The enhanced magnitudes of the performance metrics of the PProDOT//CMK-3 ASC in comparison to the inferior performance parameters for the symmetric counterparts (i.e., PProDOT//PProDOT and CMK-3//CMK-3) illustrate the benefits of an asymmetric cell architecture over a symmetric one. Demonstrations of powering a green LED and a digital thermometer with 3-ASCs connected in series show the utilitarian value of this device, for it is not only composed of nontoxic and low-cost components but also can be scaled up easily for the realization of large area supercapacitor devices.
中文翻译：
不对称聚（3,4-丙烯二氧基噻吩）// CMK-3超级电容器的高效储能
首次将聚（3,4-丙烯二氧噻吩）（PProDOT）和有序介孔碳（CMK-3）用作正电极和负电极，以及包含离子液体的凝胶电解质，将其组装到不对称超级电容器（ASC）中。PProDOT的优点包括：通过法拉第反应进行电荷存储，在掺杂状态下具有11 mS cm –1的大电导率，可经受长期循环的坚固的微结构以及易于形成薄涂层的放大工艺。CMK-3具有多孔介孔形貌的优势，可以使电解质离子快速传播，有效表面积为898 m 2 g –1，最大程度地形成了双电层，电导率约为12 mS cm –1，这导致2 V的宽工作电压范围，294 mF cm –2的面积比电容（SC），0.86至3.98 mW cm –2的功率密度，0.16至0.11 mWh cm –2的能量密度对于PProDOT // CMK-3 ASC，在5000次循环后，自放电速度慢，漏电流低，并且SC保留率达98％。与对称对象的劣等性能参数（即，PProDOT // PProDOT和CMK-3 // CMK-3）相比，PProDOT // CMK-3 ASC的性能指标的幅度得到了提高，这说明了非对称的优点一个对称的单元架构。为绿色LED和串联有3-ASC的数字温度计供电的演示显示了该设备的实用价值，因为它不仅由无毒且低成本的组件组成，而且可以轻松放大以实现大型区域超级电容器设备。
更新日期：2020-02-20
中文翻译：
不对称聚（3,4-丙烯二氧基噻吩）// CMK-3超级电容器的高效储能
首次将聚（3,4-丙烯二氧噻吩）（PProDOT）和有序介孔碳（CMK-3）用作正电极和负电极，以及包含离子液体的凝胶电解质，将其组装到不对称超级电容器（ASC）中。PProDOT的优点包括：通过法拉第反应进行电荷存储，在掺杂状态下具有11 mS cm –1的大电导率，可经受长期循环的坚固的微结构以及易于形成薄涂层的放大工艺。CMK-3具有多孔介孔形貌的优势，可以使电解质离子快速传播，有效表面积为898 m 2 g –1，最大程度地形成了双电层，电导率约为12 mS cm –1，这导致2 V的宽工作电压范围，294 mF cm –2的面积比电容（SC），0.86至3.98 mW cm –2的功率密度，0.16至0.11 mWh cm –2的能量密度对于PProDOT // CMK-3 ASC，在5000次循环后，自放电速度慢，漏电流低，并且SC保留率达98％。与对称对象的劣等性能参数（即，PProDOT // PProDOT和CMK-3 // CMK-3）相比，PProDOT // CMK-3 ASC的性能指标的幅度得到了提高，这说明了非对称的优点一个对称的单元架构。为绿色LED和串联有3-ASC的数字温度计供电的演示显示了该设备的实用价值，因为它不仅由无毒且低成本的组件组成，而且可以轻松放大以实现大型区域超级电容器设备。
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