Protective Effect of LiPON Solid Electrolyte Films on Lithium Electrodes

Abstract:

A LiPON solid electrolyte film was prepared, and then a lithium metal electrode protected by the LiPON film was obtained through an electrodeposition method. The electrochemical behaviors of the electrode were tested in nonaqueous organic electrolyte. Results show that because of LiPON film the non-Faraday reactions between the lithium electrode and the electrolyte were depressed, resulting in a more stable lithium/electrolyte interface. As a result of the LiPON protection, the lithium electrode present excellent interface stability during charge/discharge cycles; therefore higher Coulombic cycle efficiency and longer cycle-life are obtained.