Battery innovation could boost power delivery for electric aircraft
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Borrowing methods from biology, a team of scientists and engineers designed and tested an electrolyte that keeps battery power delivery high, cycle after cycle
From the University of Michigan
A battery component innovation could help keep power delivery high when electric aircraft land with low charge, according to a study led by Lawrence Berkeley National Laboratory with expertise from the University of Michigan.
The research provides a solution to a problem identified in 2018 in a study led by Venkat Viswanathan, professor of aerospace engineering at U-M and a co-author of the new work published in Joule.
“Both takeoff and landing require high power, and landing is more challenging because you’re not fully charged,” Viswanathan said. “To get high power you have to bring all the resistances down. Anything that affects the ability to deliver that power.”
The team emphasized that this is distinct from the needs of EV batteries, which mainly need to maintain their ranges.
“In an electric vehicle, you focus on capacity fade over time,” said study lead author Youngmin Ko, a postdoctoral researcher at Berkeley Lab’s Molecular Foundry. “But for aircraft, it’s the power fade that’s critical—the ability to consistently achieve high power for takeoff and landing.”
Both capacity fade and power fade typically occur when lithium ions can no longer move easily in and out of the electrodes.
While the key for capacity fade is the quantity of lithium ions that can move between the electrodes, the main factor for power fade is speed. The problem is that corrosion builds up on the electrodes, taking up space that could have housed lithium ions and making it harder for the lithium to reach available spaces …
Research further here.
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