Machine learning uncovers how battery interphases can boost lithium-ion transport

by Ashley Piccone, Lawrence Livermore National Laboratory

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Add as preferred source Interphases — the multicomponent interlayer structures that emerge between electrodes and electrolytes in batteries — critically determine the performance and durability of electrochemical cells. Credit: Sabrina Wan Sandwiched between the electrolyte and electrodes in a lithium-ion battery is a remarkably thin layer of material that strongly dictates battery performance and durability: the interphase. Although typically only a few to tens of nanometers thick, interphases are among the least understood components of an operating battery cell. Their complex and constantly evolving structures make it challenging to determine how their atomic features and microscopic variations translate into macroscopic battery performance.