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Study Reveals New Insights for Developing Lithium Metal Batteries
Written by AZoMFeb 26 2021
Nanoengineers from the University of California, San Diego (UC San Diego) have gained a new fundamental insight for designing lithium metal batteries that work well at very low temperatures; specifically, the weaker the electrolyte binds to lithium ions, the better.
Simulated structures of the binding between a lithium-ion and electrolyte molecules. Image Credit: John Holoubek/Nature Energy.
The researchers have now used this weakly binding electrolyte and have successfully designed a lithium metal battery that can be continuously recharged at temperatures down to −60°C the first-of-its-kind in the field. The team has reported the study results in an article published in the
E-Mail
Nanoengineers at the University of California San Diego have discovered new fundamental insights for developing lithium metal batteries that perform well at ultra-low temperatures; mainly, that the weaker the electrolyte holds on to lithium ions, the better. By using such a weakly binding electrolyte, the researchers developed a lithium metal battery that can be repeatedly recharged at temperatures as low as -60 degrees Celsius a first in the field.
Researchers report their work in a paper published Feb. 25 in
Nature Energy.
In tests, the proof-of-concept battery retained 84% and 76% of its capacity over 50 cycles at -40 and -60 degrees Celsius, respectively. Such performance is unprecedented, researchers said.
Credit: University of California
A team of researchers designed and manufactured a new sodium-ion conductor for solid-state sodium-ion batteries that is stable when incorporated into higher-voltage oxide cathodes. This new solid electrolyte could dramatically improve the efficiency and lifespan of this class of batteries. A proof of concept battery built with the new material lasted over 1000 cycles while retaining 89.3% of its capacity a performance unmatched by other solid-state sodium batteries to date.
Researchers detail their findings in the Feb. 23, 2021 issue of
Nature Communications.
Solid state batteries hold the promise of safer, cheaper, and longer lasting batteries. Sodium-ion chemistries are particularly promising because sodium is low-cost and abundant, as opposed to the lithium required for lithium-ion batteries, which is mined at a high environmental cost. The goal is to build batteries that can be used in large-scale grid energy storage applications, especiall
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