What is a zinc bromine flow battery?

Zinc bromine flow batteries or Zinc bromine redux flow batteries (ZBFBs or ZBFRBs) are a type of rechargeable electrochemical energy storage system that relies on the redox reactions between zinc and bromine. Like all flow batteries, ZFBs are unique in that the electrolytes are not solid-state that store energy in metals.

Are zinc bromine flow batteries better than lithium-ion batteries?

While zinc bromine flow batteries offer a plethora of benefits, they do come with certain challenges. These include lower energy density compared to lithium-ion batteries, lower round-trip efficiency, and the need for periodic full discharges to prevent the formation of zinc dendrites, which could puncture the separator.

How much money did Columbia University get for a zinc bromine flow battery?

In 2021, a Columbia University research team received a $3.4 million award from the Energy Department’s ARPA-E office for a three-year dive into zinc bromine flow battery technology. The grant program is due to wrap up at the end of this year.

Are zinc-bromine batteries safe?

Zinc-bromine batteries (ZBBs) have recently gained significant attention as inexpensive and safer alternatives to potentially flammable lithium-ion batteries. Zn metal is relatively stable in aqueous electrolytes, making ZBBs safer and easier to handle.

How do no-membrane zinc flow batteries work?

In no-membrane zinc flow batteries (NMZFBs) or iterations of the ZBFB that does not use a membrane to separate the positive and negative electrolytes, the electrolytes are separated by a porous spacer that allows ions to pass through but prevents the two electrolytes from mixing.

How much money will EOS Energy enterprises invest in next-generation zinc bromine technology?

In the meantime, the Energy Department’s famous Loan Programs Office has granted conditional approval for an assist of almost $400 million to commercialize next-generation zinc bromine technology developed by the Pennsylvania company Eos Energy Enterprises.