A "tug-of-war" effect tunes Li-ion transport and enhances the rate capability of lithium metal batteries.

ABSTRACT: "Solvent-in-salt" electrolytes (high-concentration electrolytes (HCEs)) and diluted high-concentration electrolytes (DHCEs) show great promise for reviving secondary lithium metal batteries (LMBs). However, the inherently sluggish Li⁺ transport of such electrolytes limits the high-rate capability of LMBs for practical conditions. Here, we discovered a "tug-of-war" effect in a multilayer solvation sheath that promoted the rate capability of LMBs; the pulling force of solvent-nonsolvent interactions competed with the compressive force of Li⁺-nonsolvent interactions. By elaborately manipulating the pulling and compressive effects, the interaction between Li⁺ and the solvent was weakened, leading to a loosened solvation sheath. Thereby, the developed electrolyt

SUBMITTER: Zhang H 

PROVIDER: S-EPMC9993850 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature