TECHNOLOGY FOR CHANGE

Air-Electrode Lithium Battery

Three universities are halfway to completing a battery that employs oxygen to recharge it as it discharges, making the battery lighter, less expensive and longer-lasting than conventional lithium batteries.

The University of St. Andrews, Newcastle University and the University of Strathclyde announced on June 1 that they had reached the halfway point of a four-year project aimed at perfecting the design of a battery that employs oxygen from ambient air as a reagent with lithium to progressively recharge the battery as it discharges. By obviating the need to store a reagent internally, the STAIR (St. Andrews Air) battery will be lighter and considerably less expensive than conventional lithium cells, and is expected to offer run-times between five and 10 times longer than current technology permits.

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