Researchers at Cornell University recently conducted a study that could result in the latest in a series of battery innovations that could change the world. As the Cornell Chronicle reports, the team led by Dr. Vibha Kalra developed an electrochemical solution capable of restoring up to 95% of a recycled battery’s energy by regenerating its electrodes. Not only that, but bathing could improve the overall health of the battery and allow the battery to last longer when reused.
This is a major advancement as the battery market continues to expand. Benchmark Mineral Intelligence reports that global demand for lithium-ion batteries will increase by 29% in 2025 due to growth in the electric vehicle market and other sectors. But even if demand increases, existing batteries will be lost too quickly. Let’s be real, we all make mistakes that destroy the lithium batteries in our devices.
The United States generates approximately 180,000 tons of hazardous waste each year just from disposing of batteries (via EARC Inc.), which also creates a huge financial burden for recycling companies. The electrochemical bath designed at Cornell could provide an efficient recycling method that could reduce recycling costs by 56 percent and overall reduce stress on the environment.
How this electrochemical bath actually works
Kalra’s team published their research in the journal Energy & Environmental Science, in which the functionality of the electrochemical bath is explained in detail. In a process called direct electrode-to-electrode regeneration (DEER), the electrodes of a used battery are removed and placed in a bath containing a solution of the chemical solvent 1,3-dimethyl-2-imidazolidinone (DMI). The DMI solution dissolves the solid electrolyte interphase, which is an insulating layer that builds up during battery charging cycles and decreases its energy capacity.
Kalra sums up DEER by explaining: “We repair (the electrodes), as is, without shredding or powdering them, and then put them back into a new battery. » Needless to say, this isn’t something you’ll do at home for your own used batteries. It’s also not something that’s ready for widespread industrial use. DEER has not yet been demonstrated on industrial batteries, and it has not been tested to restore batteries from other forms of degradation, such as lithium loss.
Until scientists can restore existing lithium-ion batteries reliably and consistently with these baths, manufacturers may need to turn to new ways of producing battery-grade lithium in order to meet demand. But as Kalra points out, “people are realizing that we can’t continue making batteries, because we don’t have enough materials.” Research into restoring battery health will surely become more essential as time passes.
