Engineers at the University of California San Diego (UCSD) have developed new lithium-ion batteries that perform well at freezing cold and scorching hot temperatures, while still packing a lot of energy. According to the researchers, this feat was accomplished by developing an electrolyte that is no
t only versatile and robust throughout a wide temperature range, but also compatible with a high-energy anode and cathode.
Study first author Guorui Cai, a nanoengineering postdoctoral researcher at UC San Diego, prepares a battery pouch cell for testing at subfreezing temperature. Credit: David Baillot/UC San Diego Jacobs School of Engineering High-temperature performance of battery pouch cells being tested in an oven heated to 50 °C. Credit: David Baillot/UC San Diego Jacobs School of EngineeringWhat’s also special about this electrolyte is that it is compatible with a lithium-sulfur battery, which is a type of rechargeable battery that has an anode made of lithium metal and a cathode made of sulfur.
“If you want a battery with high energy density, you typically need to use very harsh, complicated chemistry,” said Chen. “High energy means more reactions are happening, which means less stability, more degradation. Making a high-energy battery that is stable is a difficult task itself—trying to do this through a wide temperature range is even more challenging.”
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