Within the camera is exchanged protons and ions generated electrons move through the circuit the battery, causing it to discharge. Recharging takes place in reverse order. The advantage of this type of battery is that stocks may be active reagents outside the structure, ie, the expansion tank capacity can be increased significantly.
Previously developed flow batteries are using vanadium ions. This material is quite expensive. According to the researcher, the team found a replacement vanadium turning to organic chemistry. In the developed battery is sulfuric acid, which contains organic compounds quinones. In addition to cheap, this solution has another distinct advantage - more energetic forms a compound hydroquinone.
Furthermore, the reaction of hydroquinones and quinones occur thousands of times faster than using vanadium ions. Therefore, the charging and discharging the battery has become much faster. During experiments with a new battery researchers conducted 100 cycles its charge-discharge efficiency of the battery when it is not dropped.
In order to run the battery in series, scientists will need to show evidence that the battery will withstand 10 thousand cycles. According to Michael Aziz, for the production of battery, designed for storage of 1 kW ⋅ h of electricity required materials total cost of $ 27, which is three times cheaper than using vanadium technology.
Agency Defense Advanced Research Projects U.S. has already ordered a prototype battery, giving scientists three years on completion of the project. At the same time, the device is not without drawbacks. At the cathode, the battery reaction is carried out with hydrobromic acid and bromine. One problem is the high aggressiveness of these substances. In case of leakage of the battery may cause corrosion.