Enzymatic biofuel cells, capable of converting efficiently the glucose from extracellular fluid into electrical energy, are a power source for implantable devices. However, the power output generated by these cells is not sufficient to fulfill the energy required by implantable artificial organs. Therefore, a new packaging architecture design based on flexible materials derived from printing technologies has been explored in order to enhance the power output of this cell.
This work demonstrates the relevance of printing processes such as ultrasonic spray and gravure to develop homogeneous, thin and flexible biocathodes. During this work, a carbon nanotubes / surfactant suspensions were deposited on a hydrophobic flexible substrate (carbon paper). Despite the poor printability of the substrate, flexible active layers were obtained (thickness between 5 and 10 µm).