Demystifying the Salt-Induced Li Loss: A Universal Procedure for the Electrolyte Design of Lithium-Metal Batteries.

ABSTRACT: Lithium (Li) metal electrodes show significantly different reversibility in the electrolytes with different salts. However, the understanding on how the salts impact on the Li loss remains unclear. Herein, using the electrolytes with different salts (e.g., lithium hexafluorophosphate (LiPF₆), lithium difluoro(oxalato)borate (LiDFOB), and lithium bis(fluorosulfonyl)amide (LiFSI)) as examples, we decouple the irreversible Li loss (SEI Li⁺ and "dead" Li) during cycling. It is found that the accumulation of both SEI Li⁺ and "dead" Li may be responsible to the irreversible Li loss for the Li metal in the electrolyte with LiPF₆ salt. While for the electrolytes with LiDFOB and LiFSI salts, the accumulation of "dead" Li predominates the Li loss. We also

SUBMITTER: Zhu Z 

PROVIDER: S-EPMC10597960 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature