Small Begets Big (IMAGE) DOE/Pacific Northwest National Laboratory Caption The uniform nanostructure of heat-treated manganese oxide provides tunnels for sodium ions to flow through, improving the performance of the electrodes. Credit PNNL Usage Restrictions None 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.