|Title||Overcharge Protection for 4 V Lithium Batteries at High Rates and Low Temperatures|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Authors||Guoying Chen, Thomas J Richardson|
|Journal||Journal of Electrochemical Society|
|Keywords||lithium, lithium compounds, manganese compounds, polymers, secondary cells|
Overcharge protection for 4 V Li1.05Mn1.95O4/lithium cells at charging rates in excess of 1 mA/cm2 (3C) and at temperatures of as low as −20°C was achieved using a bilayer separator coated with two electroactive polymers. High rate and low temperature overcharge protection and discharge performance were improved by employing a design in which the polymer-coated portion of the separator is in parallel with the cell rather than between the electrodes. The effects of different membrane supports for the electroactive polymers were also examined.