Electrolyte based on-demand and disposable microbattery

Abstract

A micromachined battery based on liquid electrolyte and metal electrodes for on-demand and disposable usage has been successfully demonstrated. The microbattery with gold as the positive electrode and zinc as the negative electrode is fabricated by using surface micromachining technology and tested with an electrolyte consisting of sulfuric acid and hydrogen peroxide. The operation of the battery can be on-demand by putting a droplet of electrolyte to activate operation. Theoretical voltage and capacity of the microbattery are formulated and compared with experimental results. The experimental study shows that a maximum voltage of 1.5 V and maximum capacity of 122.2 /spl mu/W-min have been achieved.