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“We were looking for the easiest, cheapest, and fastest way to improve lithium metal cycling life,” said study co-lead author Wenbo Zhang, a Stanford PhD student in materials science and engineering. “We discovered that by resting the battery in the discharged state, lost capacity can be recovered and cycle life increased.
It is also expected that demand for lithium-ion batteries will increase up to tenfold by 2030, according to the US Department for Energy, so manufacturers are constantly building battery plants to keep up. Lithium mining can be controversial as it can take several years to develop and has a considerable impact on the environment.
In a lithium metal battery, the graphite anode is replaced with electroplated lithium metal, which enables it to store twice the energy of a lithium-ion battery in the same amount of space. The lithium metal anode also weighs less than the graphite anode, which is important for EVs.
Credit: SciTechDaily.com Stanford’s breakthrough in lithium metal battery technology promises to extend EV ranges and battery life through a simple resting protocol, enhancing commercial viability.
Dr Nuria Tapia-Ruiz, who leads a team of battery researchers at the chemistry department at Imperial College London, said any material with reduced amounts of lithium and good energy storage capabilities are "the holy grail" in the lithium-ion battery industry.
Lithium metal batteries can hold at least a third more energy per pound as lithium-ion. “A car equipped with a lithium metal battery would have twice the range of a lithium-ion vehicle of equal size – 600 miles per charge versus 300 miles, for example,” said co-lead author Philaphon Sayavong, a PhD student in chemistry.
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