Technology and R&D

Scientists in the U.S. claim to have demonstrated an inexpensive, long-life, safe and eco-friendly redox flow battery. The device is said to offer coulombic efficiency of 97.9%, thanks to functional electrolyte additives, pH and elevated temperature.

The system can metallize the front and back sides of silicon solar cells with unprecedented precision and speed, Fraunhofer ISE said. The technology is also suitable for components such as printed circuit boards or chip cards.

Floating PV specialist Ocean Sun and South Korean energy company EN Technologies have signed an agreement to develop the pilot projects of the 2.1 GW floating solar site planned near the Saemangeum tidal flat, on the coast of the Yellow Sea.

The seawater-based supercapacitor exhibited maximum capacitances at a current density of 1 ampere per gram. Besides, it can last 10,000 charge-discharge cycles with 99% of capacitance retention and 99% of Coulombic efficiency. 

Scientists led by MIT have suggested chitin, a carbon and nitrogen-rich material made from waste shrimp shells, could produce sustainable electrodes for vanadium redox flow batteries and other energy storage technologies.

The super-hydrophobic coating using functional nanoparticles repels dust deposition on the solar panels and cleans itself by the action of water on the modules. 

Researchers have simulated a cart-mounted solar pump which they say would mean farmers in off-grid areas would be able to irrigate fields by paying only for the solar electricity used.

Researchers in Kenya say the geomagnetic field could reduce solar panel conversion efficiency 0.21% between the equator and a 50-degree latitude. Their analysis showed the complex magnetic field can determine increases in module fill factor and falls in maximum power.

U.S. researchers have created a new model to assess the overlap between solar potential and underlying land use. The areas with the largest potential are the western United States, southern Africa, and the Middle East. The researchers concluded that croplands, grasslands, and wetlands are the top three land classes for PV projects linked to agricultural activities, while barren terrain, traditionally prioritized for solar PV system installation, ranked fifth.

Researchers from the Solar Energy Research Institute of Singapore have concluded that utility-scale PV projects relying on bifacial panels and single-axis trackers deliver the lowest levelized cost of energy in most of the world. They found that the combination of bifacial products with dual-axis trackers is still too expensive, despite the higher yield. The second-lowest LCOE is offered by monofacial single-axis tracker plants.