Biomolecule based fiber supercapacitor for implantable device
2019-11-13 17:08:39 조회수157
Hyeon Jun Sim(a), Changsoon Choi(b), Dong YeopLee(a), Hyunsoo Kim(a), Ji-HyunYun(c), Jung Min Kim(c), Tong Mook Kang(d), Raquel Ovalle(e), Ray H.Baughman(f), Chang Won Kee(c), Seon Jeong Kim(a) a)Center for Self-powered Actuation, Department of Biomedical Engineering, Hanyang University, Seoul 04763, South Korea b)Division of Smart Textile Convergence Research, DGIST, Daegu 42988, South Korea c)Department of Opthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, South Korea d)Department of Physiology, Sungkyunkwan University School of Medicine, Suwon 16419, South Korea e)Lintec of America, Nano-Science & Technology Center, Richardson, TX 75081, United States f)The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, United States 원문 링크 :


With the growing demand for electronic medical devices for healthcare applications, we studied an implantable supercapacitor that can operate in an implantable electronic device. Here, we report a flexible implantable fiber supercapacitor for an in vivo energy storage device. The fiber supercapacitor has a high flexibility and a high potential to be applied in an implant device because the fiber can be implanted in the blood vessel and the wound can be stitched with the fiber-like suture. The fiber electrodes were fabricated in a biscrolling process that trapped poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/ferritin nanoclusters within multiwalled carbon nanotube (MWNT) sheets that provide mechanical strength and electrical conductivity. In addition, the supercapacitor is biocompatible because the MWNT sheets are coated with biocompatible materials such as PEDOT:PSS and ferritin. The areal capacitance of the PEDOT:PSS/ferritin/MWNT fiber supercapacitor was 32.9 mF/cm2 in a phosphate buffered saline solution, and the areal energy density was 0.82 μWh/cm2; these values are 52 times higher than that of the guest-free MWNT yarn. The supercapacitor operated well in a mouse and exhibited excellent biocompatibility; the capacitance was maintained above 90% in the mouse after eight days. 

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