Correlations (IMAGE) Washington University in St. Louis Caption This graph shows the correlations between three parameters that lead to a single descriptor which provides a rational basis to design electrolyte compositions for high-power alkali metal-oxygen batteries, including potassium-air batteries. This research from the McKelvey School of Engineering will help engineers find the right electrolyte for new and improved batteries, including potassium-air batteries. Credit Ramani lab Usage Restrictions Use allowed with proper attribution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.