Volume 120, Number 4, November 2017
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||05 February 2018|
Theory of gel expansion to generate electrical energy
1 Membrane Science and Technology, University of Twente - Drienerlolaan 5, 7522 NB Enschede, The Netherlands
2 Wetsus, European Centre of Excellence for Sustainable Water Technology - Oostergoweg 9, 8911 MA Leeuwarden, The Netherlands
Received: 16 November 2017
Accepted: 15 January 2018
Mechanical-energy harvesters based on coiled carbon nanotube yarns are promising materials for sustainable energy generation. In this work, we present a novel mechanism to harvest energy from mechanical fluctuations by using coiled carbon nanotube yarns coated with polyelectrolyte gel. We developed a theory to explain how this new kind of energy harvesting is possible. The gel fills up all space between the coils and expands when the yarn is stretched. This translates into a change in electrical double-layer configuration, hence into a change in electrical potential. This makes it possible to electrochemically convert tensile or torsional mechanical energy into electrical energy. The influence of the yarn surface charge, polyelectrolyte charge density and salt concentration is analyzed, giving directions for optimum process design. We show calculation results for the generated power of a system consisting of two yarns coated with positive and negative polyelectrolyte gel.
PACS: 68.08.De – Liquid-solid interface structure: measurements and simulations
© EPLA, 2018
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.