Iron-chromium liquid flow electrochemical energy storage power station

What is iron chromium redox flow battery?

Iron-chromium redox flow battery was invented by Dr. Larry Thaller's group in NASA more than 45 years ago. The unique advantages for this system are the abundance of Fe and Cr resources on earth and its low energy storage cost. Even for a mixed Fe/Cr system, the electrolyte cost is still less than 10$/kWh.

Which electrolyte is a carrier of energy storage in iron-chromium redox flow batteries (icrfb)?

The electrolyte in the flow battery is the carrier of energy storage, however, there are few studies on electrolyte for iron-chromium redox flow batteries (ICRFB). The low utilization rate and rapid capacity decay of ICRFB electrolyte have always been a challenging problem.

Are iron chromium flow batteries cost-effective?

The current density of current iron–chromium flow batteries is relatively low, and the system output efficiency is about 70–75 %. Current developers are working on reducing cost and enhancing reliability, thus ICRFB systems have the potential to be very cost-effective at the MW-MWh scale.

Can indium ions improve the electrochemical performance of iron–chromium flow battery?

In 3+ crossover studies from the anolyte to the catholyte for 50 cycles at 160 mA cm −2. 4. Conclusions In this work, a small amount of indium ions is used as the additive to enhance the stability and electrochemical performance of iron–chromium flow battery by inhibiting the serious hydrogen evolution reaction.

Which chelating agent is used to prepare alkaline iron chromium electrolyte?

Marshak and co-workers proposed to employ a chelating agent to prepare alkaline iron–chromium electrolyte (pH=9). 42, 46 The composition of the electrolyte is FeDTPA (diethylenetriaminepentaacetic acid) and CrPDTA (1,3-diaminopropanetetraacetic acid) in KBi (potassium tetraborate).

What is the molar ratio of iron to chromium?

At a current density of 80 mA cm -2, Wu et al. found that the battery's energy efficiency and electrochemical activity of negative active ions were highest when the molar ratio of iron to chromium is 1:1.3. Wang et al. optimized the electrolyte of ICRFB.