MIT Technology Review
Solar power has two main problems: it's expensive, and it's intermittent, since the output of a solar power plant depends on the time of day and cloud cover. Halotechnics, an early-stage solar-thermal startup, could help solve both problems.
The company has developed new heat-storage materials that promise to not only make solar-thermal power plants more efficient, but also reduce the cost of storing energy from the sun for use when it's most needed. Read more at MIT Technology Review.