Electrokinetic power generation by means of streaming potentials: a mobile-ion-drain method to increase the streaming potentials

J Nanosci Nanotechnol. 2005 Apr;5(4):648-52. doi: 10.1166/jnn.2005.059.

Abstract

We show, by natural occurring phenomena of charge separation near the solid-liquid interface in microchannels, that electricity can be generated by forcing water through a ceramic rod with no moving part and emission. A single hand push on a syringe is our source of power which easily generates a streaming potential of over 20 V and a streaming current of 30 microA. By means of streaming potentials, two capacitors were charged and discharged alternatively to light-up two Light-Emitting-Diodes in every ten seconds. From our specific choice of liquid/solid pair, an efficiency of 0.8% was obtained. A mobile-ion-drain method is also demonstrated to increase the streaming potential.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electric Conductivity
  • Electric Power Supplies
  • Electricity
  • Electrochemistry
  • Electronics
  • Ions
  • Kinetics
  • Models, Statistical
  • Nanotechnology / methods*
  • Static Electricity
  • Time Factors
  • Water

Substances

  • Ions
  • Water