World

Floating PV has matured quickly, but while the opportunity of solar on the sea may appear immense, there is nothing trivial about the challenges posed by salinity, wind, and waves. However, technical and financial solutions are appearing on the market, giving small island communities a chance to reduce their reliance on polluting diesel.

A Turkish research team has analyzed how big changes in temperature can affect absorbance, light transmittance and reflectivity in two types of solar glass. The scientists demonstrated lower efficiency in solar cells and the glass itself were attributable to a large number of micro-cracks and deformations on the glass surface.

An international research group has analyzed the visual impact of PV facades on buildings which include crop cultivation. Architects, PV specialists and farmers were surveyed and the results showed broad acceptance of such projects.

By engineering the structure of a hard carbon electrode, scientists at the CIC energIGUNE research center have created an ‘ultrafast battery’ which has been shown to combine the energy density of a lithium device with the fast discharge times normally associated with supercapacitors.

While lithium batteries have taken center stage for energy storage, vanadium redox flow batteries could gain considerable traction in 2020. In previous years, vanadium battery installations around the world have done little more than provide proof of concept and a test bed for manufacturers, argues David Gillam from Mastermines. He looks at what may have changed since then and why a surge in batteries utilizing vanadium may be closer than many believe, with China taking the lead.

Scientists in the United States have demonstrated simple methods for ‘healing’ the cracks that form in perovskite solar cells. While it is far from clear how the approach could be applied commercially, the work suggests possibilities for maintaining the performance of perovskite cells in long-term operation.

With electric vehicles making up only 3% of the global car market last year, analyst WoodMac says battery packs need to be cheaper and lighter and range anxiety must be addressed to change the habits of drivers.

MIT scientists have developed a solar desalinator which transports heat from the sun through a ten-stage process of evaporation and condensation. The group estimates a $100 device employing their innovation could provide the daily drinking water needs of a family.

Solar module manufacturers should begin testing new technologies in higher-value niche markets, say scientists at the U.S. institution. For example, bringing perovskite technology directly to the mainstream market remains prohibitive in terms of initial investment but segments such as building-integrated PV or microelectronics devices may offer better routes to commercial maturity.

A new paper published by researchers at China’s Tianjin University examines the state of the art in grid level energy storage, outlining the pros and cons of various battery technologies being deployed on grids around the world, and remaining challenges that could be overcome if research is pushed in the right direction.