A collaborative research team from the Université de Montréal and Concordia University has unveiled a breakthrough organic molecule that could solve the intermittency challenges of renewable energy. Dubbed “AzoBiPy” (formally 4,4′-hydrazobis(1-methylpyridinium)), the molecule is designed for use in aqueous organic redox flow batteries (AORFBs) — a safer, non-flammable alternative to lithium-ion systems.
The findings — published in the Journal of the American Chemical Society — highlight AzoBiPy’s ability to undergo a reversible two-electron transfer. While most organic posolyte (positive electrolyte) molecules only exchange a single electron, AzoBiPy doubles this capacity.
In laboratory tests, the molecule demonstrated a high volumetric specific capacity of 47.1 Ah/L and exceptional solubility in water.
Stability has long been the weakness of organic storage, but AzoBiPy set a new benchmark. During a 70-day trial involving 192 charge-discharge cycles, the molecule retained nearly 99% of its initial capacity, losing a mere 0.02% per day. Researchers say this performance is almost unprecedented for an organic compound, suggesting it could store energy collected in the summer to heat homes throughout the winter.
The practical potential of this technology was highlighted during a 2024 live demonstration at a departmental holiday event. A prototype flow battery, using only two tablespoons of the aqueous solution per tank, successfully powered a set of Christmas tree lights for eight hours.
Renewability-wise, while commercial flow batteries rely mostly on vanadium, AzoBiPy is composed of abundant elements like carbon, nitrogen, and hydrogen. The team is currently exploring bio-based versions derived from wood and food waste. With patent applications underway, the researchers expect this class of compounds to reach wide-scale adoption within the next decade or so.
Chibuike Okpara – Tech Writer – 378 articles published on Notebookcheck since 2024
I have always been fascinated by technology and digital devices my entire life and even got addicted to it. I have always marveled at the intricacy of even the simplest digital devices and systems around us. I have been writing and publishing articles online for about 6 years now, just about a year ago, I found myself lost in the marvel of smartphones and laptops we have in our hands every day. I developed a passion for learning about new devices and technologies that come with them and at some point, I asked myself, “Why not get into writing tech articles?” It is useless to say I followed up the idea — it is evident. I am an open-minded individual who derives an infinite amount of joy from researching and discovering new information, I believe there is so much to learn and such a short life to live, so I put my time to good use — learning new things. I am a ‘bookworm’ of the internet and digital devices. When I am not writing, you will find me on my devices still, I do explore and admire the beauty of nature and creatures. I am a fast learner and quickly adapt to changes, always looking forward to new adventures.