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Sugar-Powered Fuel Cells

This study explores the development of biofuel cells as an alternative power supply for implantable electrically-operated medical devices. By mimicking nature's energy generation process and converting biochemical energy into electrical energy, biofuel cells offer potential advantages over traditional batteries. The carbon-based CMEMS architecture, with its wide electrochemical potential window and good electrical conductivity, shows promise in achieving this goal. Challenges to overcome include low cell voltages, interfering species adsorption, and ensuring proper electrical contact between redox enzymes and electrodes. Despite these challenges, preliminary results are promising.

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Sugar-Powered Fuel Cells

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  1. Sugar-Powered Fuel Cells Andrew Karman, 2011 Surf-it fellow GobindBisht, graduate student Dr. Marc Madou, Faculty Mentor Dr. LAWRENCE KULINSKY, Faculty Mentor

  2. Background • Biological MicroElectroMechanical Systems • Implantable electrically-operated devices: • Pacemakers • Defibrillators • Insulin pumps • Drug delivery systems • Power supplies: • Primary (non-rechargeable) batteries • Secondary batteries • Serious drawbacks in terms of safety, reliability, and scalability

  3. Objective • Development of biofuel cell: • Device to mimic nature’s method of energy generation • Conversion of biochemical energy into electrical energy • Anodic/Cathodic enzyme • Glucose oxidase / Laccase (0.78V)

  4. CMEMS Architecture • Attractive features of carbon in electrochemical application • Wide electrochemical potential window • Good electrical conductivity • Chemical and mechanical stability • Low cost

  5. CMEMS Fabrication Process

  6. Carbon Electrode Functionalization & Enzyme Attachment

  7. Challenges & Future Outlook • Problems to Overcome: • 1) Low cell voltages & power densities • 2) Adsorption of interfering species • 3) Electrical contact between redox enzymes & electrode • Prototype in Development: • Preliminary results appear promising!

  8. Questions?

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