A new study by researchers at the Department of Energy's SLAC National Accelerator found that storing lithium-ion batteries at sub-freezing temperatures can crack some parts of the battery and separate them from surrounding materials, reducing their electric storage capacity. Using a combination of X-ray analysis methods at SLAC's Stanford Synchrotron Radiation Lightsource and machine learning techniques, researchers were able to identify individual cathode particles. By looking for battery materials better suited for temperature response, scientists could address the detachment issue.