Dong Joon Lee
Energy Lab, Samsung Advanced Institute of Technology
While Li-air battery has recently become one of the most actively studied power sources for future electric vehicles, its short cycle life still remain a hurdle in the development of practical batteries. Li dendrite formation and electrolyte decomposition are frequently discussed as main causes of cell failure. We constructed a nonaqueous Li-air cell with protected Li anode employing two different nonaqueous electrolytes on cathode and anode sides respectively. With carefully designed cycling conditions, the discharge and charge of the cell could be repeated more than 100 times without significant degradation of performance. A post-mortem analysis of the eventually failed cell was performed and the tasks for further improvement of the cycle life will be discussed in the presentation.