| abstract |
PROBLEM TO BE SOLVED: To provide an electrochemical cell based on a new chemistry for a flow battery for electric energy storage on a large scale, for example, a grid scale. When charging a battery, a quinone molecule at one electrode is oxidized by releasing electrons and protons, and a quinone molecule at the other electrode is reduced by receiving electrons and protons. These reactions are reversed to supply electric energy. The present invention also provides additional high and low potential quinones that are useful in rechargeable batteries. [Selection diagram] Figure 1 |