A new process may soon make lithium batteries, which can hold twice or more the charge of current lithium-ion batteries, more environmentally sound. The stability of lithium batteries relies on the highly toxic chemical fluorine, the amount of which would be drastically cut by the new process. From the intermittent generation capabilities of solar and wind to the range of electric cars, battery capacity is one of the most significant limiting factors in the transition toward sustainable energy systems. FLUORINE IN BATTERIES Maria Lukatskaya, Professor of Electrochemical Energy Systems at ETH Zurich and leader of the research group that...