What role does propylene carbonate play in lithium-ion batteries?

In lithium-ion batteries, propylene carbonate primarily serves as a key component of the electrolyte, dissolving lithium salts (such as lithium hexafluorophosphate) and providing an ion transport medium. Its high dielectric constant and low freezing point effectively promote lithium ion dissociation and migration, thereby enhancing the battery's ionic conductivity. Furthermore, it possesses a wide electrochemical window, helping to protect the electrode structure and prevent premature electrolyte decomposition under high voltage or low temperature conditions.

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