Ultraflexible and robust graphene supercapacitors printed on textiles for wearable electronics applications
Ultraflexible and robust graphene supercapacitors printed on textiles for wearable electronics applications
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DOI：
10.1088/2053-1583/aa7d71
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发表时间：
2017-09-01
期刊：
影响因子：
5.5
通讯作者：
Yeates, Stephen G.
中科院分区：
文献类型：
--
作者：
Abdelkader, Amr M.;Karim, Nazmul;Yeates, Stephen G.
印刷石墨烯超级电容器有潜力为未来的可穿戴电子产品提供动力。我们报告了一种使用氧化石墨烯油墨和丝网印刷技术在纺织品上印刷的固态柔性超级电容器装置。印刷后，氧化石墨烯通过快速电化学方法在原位还原，避免使用任何可能损坏纺织基材的还原剂。由于油墨和纺织基材之间的强相互作用，印刷电极表现出优异的机械稳定性。电极独特的分层多孔结构促进了离子扩散，并最大化了电解质/活性材料界面的表面积。所获得的装置在10,000次循环中表现出出色的循环稳定性，并保持了优异的机械灵活性，这是可穿戴应用所必需的。这种简单的印刷技术易于扩展，并且避免了先前文献中报道的由导电纱制成的超级电容器设备制造相关的问题。
Printed graphene supercapacitors have the potential to empower tomorrow's wearable electronics. We report a solid-state flexible supercapacitor device printed on textiles using graphene oxide ink and a screen-printing technique. After printing, graphene oxide was reduced in situ via a rapid electrochemical method avoiding the use of any reducing reagents that may damage the textile substrates. The printed electrodes exhibited excellent mechanical stability due to the strong interaction between the ink and textile substrate. The unique hierarchical porous structure of the electrodes facilitated ionic diffusion and maximised the surface area available for the electrolyte/active material interface. The obtained device showed outstanding cyclic stability over 10 000 cycles and maintained excellent mechanical flexibility, which is necessary for wearable applications. The simple printing technique is readily scalable and avoids the problems associated with fabricating supercapacitor devices made of conductive yarn, as previously reported in the literature.