Rapid SECM probing of dissolution of LiCoO2 battery materials in an ionic liquid

► SECM is a powerful method for monitoring degradation of battery materials. ► Utilised here to study lithium cobalt oxide battery material in an ionic liquid. ► Able to determine solubilisation mechanism of capacity fade. ► Dissolution degradation occurs more on deep discharge than overcharge. ► Findings are contrary to the failure mechanism in organic battery electrolytes.