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Journal Article
Interfacial barrier free organic-inorganic hybrid electrolytes for solid state batteries
- Authors
- Myeong Ju Lee, Dong Ok Shin, Ju Young Kim, Jimin Oh, Seok Hun Kang, Jumi Kim, Kwang Man Kim, Yong Min Lee, Sang Ouk Kim, Young-Gi Lee
- Issue Date
- 2021-05
- Citation
- Energy Storage Materials, v.37, pp.306-314
- ISSN
- 2405-8297
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Organic-inorganic hybrid solid electrolytes (HSEs) are expected to overcome the inherent limitations of rigid fragile inorganic electrolytes for solid state batteries. Li-ion conductive filler such as garnet Li7La3Zr2O12 (LLZO) is proposed for the high performance of HSEs, unfortunately, which suffers from native surface layer resistance to Li-ion transport. Here we present highly conductive polyvinylidene fluoride (PVDF)-based HSEs incorporating LLZO fillers, whose resistive barriers are eliminated by dry etching. Our optimal composition of etched LLZO fillers (30 wt%) leads to ionic conductivity of 4.05 × 10-4 S cm-1, about two-fold improvement from non-etched counterpart. Li symmetric cells with etched fillers exhibit low interfacial resistance of 110 廓 cm2 and minimal overpotential of 90 mV. Moreover, high capacity of 79 mA h g-1 is highlighted at 4C, comparable or superior to liquid electrolyte or sulfide-based electrolyte devices. Interfacial environment in HSEs ideally modified for Li-ion transport is identified by 7Li NMR measurements.
- KSP Keywords
- 7Li NMR, Barrier-free, High capacity, High performance, Hybrid electrolyte, Hybrid solid, Interfacial barrier, Interfacial resistance, Liquid electrolyte, Optimal composition, Solid electrolyte
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
