—Lithium-Air Batteries With More Oomph “Electrochemistry: Modifying the electrode and electrolyte leads to a battery that cycles by forming and decomposing lithium hydroxide, not lithium peroxide” By overhauling the guts of a lithium-air battery, researchers in England have come up with a higher performance design that may help move the battery from research labs to consumer products (Science 2015, DOI: 10.1126/science.aac7730). Lithium-air batteries, which draw oxygen from the air to drive battery chemistry, pack roughly 10 times as much energy per weight as lithium-ion batteries. But they operate sluggishly and fail quickly as a result of the electrochemistry products, mainly Li2O2, that form during battery use. Li2O2 tends to form crystals about 2 μm in diameter that clog standard porous carbon electrodes, which reduces charge capacity.
by Mitch Jacoby |
November 02, 2015