Printed Enzymatic Current Sources
One of the main requirements for a power source to be used together with mass marketed package integrated functionalities (sensors, displays or entertaining features
Biofuel cells are devices capable of transforming chemical energy directly to electrical energy via electrochemical reactions involving enzymatic catalysis replacing precious metal catalysts. Operational principles are the same in biofuel cells and in conventional fuel cells, but the operating conditions, catalysts, materials, as well as fuels utilized differ considerably from the conventional fuel cells. In an enzymatic biofuel cell various oxidising and reducing enzymes,
In this chapter the possibility to utilise biological catalysts, enzymes, as the active components of a printed power sources
Several printing techniques offer possibilities in the manufacturing of thin power sources, the important thing being the structure of the printed layer. Basically, several different printing methods are in principle suitable for the production of bioelectrochemically active layers with high reproducibility and possibility of mass-production and long-term storage stability. Potential printing methods and existing applications of power sources are discussed generally. Examples of mass-producible applications particularly involving the use of printed enzymes are also presented.
The feasibility of the concept for printed enzyme catalyzed fuel cells has also been demonstrated by the authors of this chapter and is described. Particularly, the principle of the power source, ink formulation, stability, structure, manufacturing and performance of this novel, enzyme based power source are discussed.