Design and Fabrication of Printed Paper-Based Hybrid Micro-Supercapacitor by using Graphene and Redox-Active Electrolyte
Design and Fabrication of Printed Paper-Based Hybrid Micro-Supercapacitor by using Graphene and Redox-Active Electrolyte
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DOI：
10.1002/cssc.201800426
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发表时间：
2018-06-11
期刊：
影响因子：
8.4
通讯作者：
Gomez-Romero, Pedro
中科院分区：
文献类型：
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作者：
Nagar, Bhawna;Dubal, Deepak P.;Gomez-Romero, Pedro
受未来对灵活、简单和低成本储能设备需求的启发，在传统施乐纸基板上开发了基于石墨烯的智能微型超级电容器。探索了氧化还原活性物质（碘氧化还原对）的使用，以进一步提高纸器件的性能。基于印刷石墨烯纸的器件本身在 6.5 mA cm(-3) 电流下已具有 29.6 mFcm(-3)（整个器件的体积）的显着最大体积电容。测试了石墨烯表面具有氧化还原活性碘化钾的混合电极的性能。值得注意的是，混合器件的体积电容提高到了 130 mF cm(-3)。 H2SO4 电解液中石墨烯+KI 器件的最大能量密度估计为0.026 mWh cm(-3)。因此，这项工作提供了一种基于低成本印刷石墨烯纸的新型简单、轻便的微型超级电容器，它将在便携式电子产品中得到广泛的应用。
Inspired by future needs of flexible, simple, and low-cost energy storage devices, smart graphene-based micro-supercapacitors on conventional Xerox paper substrates were developed. The use of redox-active species (iodine redox couple) was explored to further improve the paper device's performance. The device based on printed graphene paper itself already had a remarkable maximum volumetric capacitance of 29.6 mFcm(-3) (volume of whole device) at 6.5 mA cm(-3). The performance of the hybrid electrode with redox-active potassium iodide at the graphene surface was tested. Remarkably, the hybrid device showed improved volumetric capacitance of 130 mF cm(-3). The maximum energy density for a graphene + KI device in H2SO4 electrolyte was estimated to be 0.026 mWh cm(-3). Thus, this work offers a new simple, and lightweight micro-supercapacitor based on low-cost printed graphene paper, which will have great applications in portable electronics.