主权项 |
1. An electrochemical energy storage device comprising a container including a negative electrode, a positive electrode and an electrolyte disposed between the negative electrode and positive electrode, wherein the electrochemical energy storage device has a first potential difference between the negative electrode and positive electrode at a first temperature that is less than about 50° C. and a second potential difference between the negative electrode and positive electrode at a second temperature of at least about 250° C., wherein the second potential difference is greater than the first potential difference, wherein at least two of the positive electrode, electrolyte and negative electrode are liquid at the second temperature, and wherein over a charge/discharge cycle, the electrochemical energy storage device undergoes sustained self-heating. |