Electric Vehicle Battery (IMAGE) Penn State Caption In a battery, ions flows from the cathode to the anode, resulting in a positive energy charge for the unit. Credit Chao-Yang Wang Lab, Penn State Usage Restrictions non commercial use only 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.