Highly stretchable pseudocapacitors based on buckled reticulate hybrid electrodes

• DOI: 10.1007/s12274-014-0528-6
• Publication Date: 2014-08-27T18:13:32Z
• Authors: Nan Zhang; Pingshan Luan; Weiya Zhou; Qiang Zhang; Le Cai; Xiao Zhang; Wenbin Zhou; Qingxia Fan; Feng Yang; Duan Zhao; Yanchun Wang; Sishen Xie
• Keywords: 02 engineering and technology; 0210 nano-technology

In order to develop an excellent pseudocapacitor with both high specific capacitance and outstanding stretchability to match with other devices applicable in future wearable and bio-implantable systems, we focus our studies on three vital aspects: Stretchability of hybrid film electrodes, the interface between different components, and the integrated performance in stretchability and electrochemistry of supercapacitors based on single-walled carbon nanotube/polyaniline (SWCNT/PANI) composite films on pre-elongated elastomers. Owing to the moderate porosity, the buckled hybrid film avoids the cracking which occurs in conventional stretchable hybrid electrodes, and both a high specific capacitance of 435 F·g−1 and a high strain tolerance of 140% have been achieved. The good SWCNT/PANI interfacial coupling and the reinforced solid electrolyte penetration structure enable the integrated pseudocapacitors to have stretch-resistant interfaces between different units and maintain a high performance under a stretching of 120% elongation, even after 1,000 cyclic elongations.