Lithium-ion transport in inorganic active fillers used in PEO-based composite solid electrolyte sheets
Young-Woong Song, Kookjin Heo, Jongkwan Lee, Dahee Hwang, Minyoung Kim, Su Jin Kim, Jaekook Kim, Jinsub Lim
Abstract
Li nuclear magnetic resonance (NMR) analysis, during which lithium-ion transport pathways varied as a function of the particle size. NMR analysis showed that when BM-LLZTO was used, the migration of Li ions through the interface occurred at a fast rate owing to the small size of the constituent particles. During the Li/CSEs/Li symmetric cell experiment, the BM-LLZTO CSE exhibited lower overvoltage characteristics than the LLZTO CSE. A comparison of the characteristics exhibited by the LFP/CSEs/Li cells confirmed that the cells using BM-LLZTO exhibited high discharge capacity, rate performance, and cycling stability irrespective of the CSE thickness.