Publications논문

Stretchable Fiber Biofuel Cell by Rewrapping Multiwalled Carbon Nanotube Sheets
2019-11-13 17:24:03 조회수186
Hyeon Jun Sim, Dong Yeop Lee, Hyunsoo Kim, Young-Bong Choi, Hyug-Han Kim, Ray H. Baughman and Seon Jeong Kim* 1. H. J. Sim, D. Y. Lee, H. Kim and Prof. S. J. Kim * Center for Self-powered Actuation, Department of Bi omedical Engineering, Hanyang University, Seoul 04763, Korea. 2. Y. Choi and H. Kim Department of Chemistry, Dankook University, Cheona n 31116, Korea. 3. R. H. Baughman The Alan G. MacDiarmid NanoTech Institute, Universi ty of Texas at Dallas, Richardson, Texas 75083, USA. 원문 링크 : https://pubs.acs.org/doi/10.1021/acs.nanolett.8b02256

Abstract

The fiber-type biofuel cell is attractive as an implantable energy source because the fiber can modify various structures and the wound can be stitched like a suture. In addition, in daily life, the biofuel cell is forced by human motion, and stretchability is a critical requirement for real applications. Therefore, we introduce a new type of highly stretchable, stable, soft fiber biofuel cell with microdiameter dimensions as an energy harvester. The completed biofuel cell operated well in fluids similar to human fluids, such as 20 mM phosphate-buffered 0.14 M NaCl solution (39.5 mW/cm2) and human serum (36.6 μW/cm2). The fiber-type biofuel cell can be reversibly stretched up to 100% in tensile direction while producing sustainable electrical power. In addition, the unique rewrapping structure, which traps the enzyme between multiwalled carbon nanotube sheets, enormously enhanced the stability of the biofuel cell when the biofuel cell was repeatedly stretched (the power density retention increased from 63 to 99%) and operated in human serum (the power density retention increased from 29 to 86%). The fiber can be easily woven into various structures, such as McKibben braid yarn, and scaled up by series and parallel connections. 

 
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