Highly stretchable hybrid nanomembrane supercapacitors
2016-10-24 18:13:12 조회수813
Keon Jung Kim(a), Jae Ah Lee(a),(b), M´arcio D. Lima(b) Ray H. Baughman(b) and Seon Jeong Kim(a)* a) Center for Self-powered Actuation, Department of Biomedical Engineering, Hanyang University, Seoul 04763, Korea. E-mail: ) The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, USA 원문 링크 :!divAbstract


Supercapacitors that are lightweight, mechanically deformable (stretchable, flexible) and electrochemically stable have potential for various applications like portable, wearable, and implantable electronics. Here we demonstrate a stretchable and high-performing hybrid nanomembrane supercapacitor. The hybrid nanomembrane is prepared by vapour phase polymerization (VPP) based nanoscopic PEDOT coating on carbon nanotube sheets (CNS) transferred onto an elastomeric substrate to form a wavy structure. The resulting wavy structured hybrid nanomembrane based supercapacitor exhibits high electrochemical performance and mechanical stretchability, simultaneously.The high specific capacitances and energy density (82 F g1, 11 mF cm2, and 7.28 W h kg1 at 0% strain) are retained under large mechanical deformation (77 F g1 and 6.87 W h kg1 at a biaxial strain of 600%). Moreover, there is only <1% degradation of capacitance ratio after 1000 cycles stretching/releasing and bending/unbending. This high mechanical cyclic stability is shown even during stretching/ releasing and bending/unbending measured by dynamic cyclic voltammetry (CV). These results suggest that our supercapacitor is valuable in a wide range of applications that require it to be electrochemically stable under large mechanical deformation, such as strain sensors, wearable electronics and biomedical devices. Lightweight, 

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