Planet Gore

Major MIT Breakthrough on Storing Solar Energy?

This may be a “Holy Grail” innovation if the MIT scientists can back up what they say:

Researchers at the Massachusetts Institute of Technology (MIT), say they may have perfected a way to control the capture and release of solar energy through thermo-chemical technology, a method of harnessing solar power which was explored in the 1970s but abandoned as too expensive and impractical.

  

Conventional solar capture and storage technologies used today are primarily photovoltaic cells (solar panels), which convert sunlight directly into electricity; and solar thermal, which concentrate the sun’s heat and use it to boil water to turn a turbine, or use the heat directly for hot water or home heating.

 

Thermo-chemical solar power captures energy from sunlight and stores it as heat within molecules of a certain chemical. Then that energy, when needed, is released on demand. Unlike standard solar thermal systems which can allow heat to slowly leach away over time, heat stored within the thermo-chemical fuel remains stable. 

  

Unfortunately, the essential element needed to allow the thermo-chemical to both absorb sunlight and release it – ruthenium – was too rare to ever be cost effective. But the MIT research team say they have uncovered exactly how the essential molecule responsible for absorbing, storing, and releasing solar energy works. And this understanding, they said, should make it possible to find similar chemicals based on more abundant, less expensive materials than ruthenium.

The rest here.

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