Journal
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
Volume 16, Issue 4, Pages 667-675Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0960-1317/16/4/001
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This study conducts an analytical and experimental investigation associated with energy transfer by using a nano-porous membrane. The calculated results indicate that the streaming potential held at a saturated value when the electrolyte concentration is below a certain critical value. After passing this threshold value, the streaming potential decays dramatically with the electrolyte concentration. The efficiency increased with an increase of surface charge density and with a decrease of concentration. Generally, higher maximum efficiency can be achieved at a smaller channel. However, as the pore diameter is varied, a maximum efficiency is encountered. The results indicate that the battery performance can be efficiently improved by the unipolar characteristic inside the nano-sized channel. Our experimental results verify the analytical results; the best efficiency obtained is 0.77% in Our experiments at a nominal 200 nm pore size alumina membrane having a 2.1 cm diameter and a 60 mu m thickness. The maximum output energy is 18 mu W by using a nominal 20 nm pore size alumina membrane.
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