Figure 2 (IMAGE) Tohoku University Caption Current-voltage, current-power polarization curves (left), and discharge curves (right) of acid/alkaline tandem electrolyte Zn-air battery cells by using Pt/C and Azul electrocatalysts. Credit Hiroshi Yabi Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.