Among the obstacles in the way of the triumph of renewable energy, one stands out: the lack of cheap, efficient means to store power. Now, it could just be starting to crumble. Matt Scotland and Caspar Henderson report.
The Forum for the Future is a registered charity and a company limited by guarantee, registered in England and Wales. Registered office: Overseas House, 19-23 Ironmonger Row, London, EC1V 3QN, UK. Registered charity no. GB 1040519. Company no. 2959712. VAT registration no.162347319