Energy recovery
Energy harvesting
Energy harvesting is the process by which energy is drawn from external sources (solar, wind, thermal, vibration, kinetic, chemical, etc.) in infinitesimal quantities, then stored for use in the autonomous operation of small portable devices such as those of the wearable electronics. Wireless sensor network but also large-scale applications, especially for thermic sources: foundries, space, etc.
Energy harvesting systems generally supply very small quantities of electrical current to low-power electronic circuits, from energy sources present in the environment.
The market for low power (sub-watt) (thermic source) energy harvesting systems was estimated at 100,000 units in 2014 and could reach 9 million units in 2020 and could gradually replace the batteries of portable devices or dynamos on bicycles.
Clay
Clays have been used for many centuries in the design of ceramics, pottery or even in construction.clay More recently, materials science researchers are working on the integration of clays as so-called active fillers in polymers.
In the form of ceramics, they can be used in the design of battery electrodes. They are then present in very small quantities and often associated with different metals and polymers constituting electrodes.
Clays can contain ions. Their arrangement in sheets allows certain clays to have a large developed adsorption surface.
This makes it possible to envisage its use in an unprecedented way in electrochemistry for the production of new components or elements for the storage and production of electrical energy.