Asymmetrically coated LAGP/PP/PVDF-HFP composite separator film and its effect on the improvement of NCM battery performance.

ABSTRACT: Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) is an inorganic solid electrolyte with a Na superionic conductor (NASICON) structure that provides a channel for lithium ion transport. We coated LAGP particles on one side of a polypropylene (PP) separator film to improve the ionic conductivity of the separator, and water-dispersed polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) on the other side to reduce the interfacial resistance between the separator and the lithium metal anode. The results show that the LAGP/PP/PVDF-HFP separator has a high ionic conductivity (1.06 mS cm^-1) at room temperature (PP separator: 0.70 mS cm^-1), and an electrochemical window of 5.2 V (vs. Li⁺/Li). The capacity retention of a NC

SUBMITTER: Liang T 

PROVIDER: S-EPMC9076374 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature