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A glucose fuel cell for implantable brain-machine interfaces.

Benjamin I Rapoport1, Jakub T Kedzierski, Rahul Sarpeshkar

  • 1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America.

Plos One
|June 22, 2012
PubMed
Summary

This study presents an implantable glucose fuel cell, manufactured using semiconductor techniques, offering a sustainable power source for microelectronic systems. It efficiently harvests energy from glucose and oxygen in the body.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Electrochemistry

Background:

  • Implantable electronic devices require long-lasting, self-sustaining power sources.
  • Traditional power sources face limitations in longevity and biocompatibility.
  • Energy harvesting from physiological sources like glucose offers a promising alternative.

Purpose of the Study:

  • To develop and characterize an implantable fuel cell for powering microelectronic systems.
  • To utilize glucose oxidation as a sustainable energy source within the body.
  • To overcome design challenges in separating fuel cell reactants in a physiological environment.

Main Methods:

  • Fabrication of an implantable fuel cell using semiconductor manufacturing techniques.
  • Utilizing platinum anode for glucose oxidation and single-walled carbon nanotubes cathode for oxygen reduction.

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  • Employing a half-open geometry to create an oxygen gradient for selective reactant utilization.
  • Computational modeling to assess energy harvesting potential in the cerebrospinal fluid.

    • Main Results:

    • Achieved steady-state power of 3.4 μW cm⁻² and peak power up to 180 μW cm⁻².
    • Demonstrated a novel fuel cell design using semiconductor fabrication for integration with microelectronics.
    • Validated a half-open geometry that effectively separates anode and cathode reactions.
    • Computationally predicted potential glucose energy harvesting rates of at least 1 mW in the brain.

    Conclusions:

    • The developed implantable glucose fuel cell offers a viable long-term power solution for microelectronic systems.
    • Semiconductor fabrication techniques enable scalable production and integration with other silicon-based devices.
    • The novel design successfully addresses reactant separation challenges in physiological environments.
    • Potential applications include powering low-power brain-machine interfaces and other implantable devices.