Taiwan-based researchers figured out how to efficiently extract residual energy from waste batteries.
A group of Taiwan-based researchers have figured out how to extract residual energy from waste batteries in an efficient manner., the scientists explain that even though alkaline and zinc-carbon batteries are common in many self-powered devices, once a battery is discharged, it is no longer usable and is discarded.According to estimates, nearly 15 billion batteries are produced and sold worldwide annually.
“Draining small remaining energy from household batteries is a starting point for waste reduction, and the proposed energy recovery method serves as an effective tool to reutilize a large number of discarded primary batteries,“ lead researcher Chien-Hsing Lee said in a media statement. For a discarded primary cell, the researchers found that the short-circuit discharge method had the highest discharge rate at the beginning of the discharge cycle. However, the SAPD method showed a higher discharge rate at the end of the discharge cycle. Using the SCD and SAPD methods, the energy recovered was 32% and 50%, respectively. Upon combining these methods, 54% of energy was recovered.
“While there seems to be no advantage in draining a small amount of energy from a single discarded battery, the recovered energy significantly increases if a large number of waste batteries are exploited,” Lee said.
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