A Conductive Hydrogel-based Biofuel Cell Installed in Stent for Endoprothesis

Nowadays there is a problem connected to traditional power supply of implantable bioelectronic devices - lithium-ion batteries. Enzymatic biofuel cell (EBFC) is an electrochemical power generator which uses renewable resources for operation. Hydrogel with a conductive filler of animated graphene could be a promising technology for a bioanode manufacture. A stent for endoprothesis could be used as a cathode to make an implantation via minimally invasive surgery. In the present investigation a highly efficient bioanode was elaborated, the obtained catalytic current was ~ 50 μΑ. The final device was integrated into stent for endoprothesis to get the results of open circuit voltage (OCV) and the maximum power. The resulting values were 810 mV and 6.54 μW for OCV and maximum power, respectively. The data obtained via cyclic voltammetry measurement could indicate that aminated graphene provides a mediator-less electron transfer. Also the value of the catalytic current shows the efficiency of the manufactured bioanodes.