More than 240 breakthrough energy developments from ARPA-E awardees and other innovative companies were on display at the third annual ARPA-E Energy Innovation Summit Technology Showcase this year. These projects covered everything from grid-scale storage to building efficiency to advanced carbon capture and electrofuels. Leaders from across research, business, and government were able to meet with the researchers and entrepreneurs behind these innovative clean energy startups.

ARPA-E was launched in 2009 to support projects that could lead to transformational, breakthrough technologies, but are considered too risky for private sector investment. If successful, these projects could form the foundation for new industries and make a tremendous impact on the economy.

Check out the photo slideshow above for a look at some of the highlights.