Method for enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom

摘要

The present invention broadly encompasses energy storage devices or systems, and more specifically relates to methods for enhancing the performance of electrochemical double layer capacitors (EDLC) or supercapacitors or ultracapacitors and devices formed therefrom. In some embodiments, the present invention generally provides energy storage devices such as EDLCs that use phosphonium-based electrolytes, and methods for enhancing their performance and operation by processing such devices. About. Embodiments of the present invention further include conventional ammonium-based electrolytes utilized in such EDLCs, as well as phosphonium-based electrolytes composed of phosphonium ionic liquids, salts, and compositions.