The key to the batteries’ ability to tolerate both hot and cold temperatures lies in its special electrolyte, the team explained.
This is made of a solution of dibutyl ether mixed with a lithium salt.
The former binds weakly to lithium ions, meaning as the battery runs, the electrolyte molecules can easily let go of the ions, improving performance at sub-zero temperatures.
In addition, dibutyl ether is able to tolerate higher temperatures because it has a high boiling point of 236F.
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