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Interfacial barrier free organic-inorganic hybrid electrolytes for solid state batteries
- Title
- Interfacial barrier free organic-inorganic hybrid electrolytes for solid state batteries
- Authors
- Lee, Myeong Ju; Shin, Dong Ok; Kim, Ju Young; Oh, Jimin; Kang, Seok Hun; Kim, Jumi; Kim, Kwang Man; Lee, Yong Min; Kim, Sang Ouk; Lee, Young-Gi
- DGIST Authors
- Lee, Myeong Ju; Shin, Dong Ok; Kim, Ju Young; Oh, Jimin; Kang, Seok Hun; Kim, Jumi; Kim, Kwang Man; Lee, Yong Min; Kim, Sang Ouk; Lee, Young-Gi
- Issue Date
- 2021-05
- Citation
- Energy Storage Materials, 37, 306-314
- Type
- Article
- Keywords
- COMPOSITE POLYMER ELECTROLYTES; ION-CONDUCTING MEMBRANE; DOPED LI7LA3ZR2O12; SURFACE-CHEMISTRY; LITHIUM BATTERIES; STABILITY; POLYCRYSTALLINE; SPECTROSCOPY; PERFORMANCE; FABRICATION
- ISSN
- 2405-8297
- 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 Ω 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. © 2021 Elsevier B.V.
- URI
- http://hdl.handle.net/20.500.11750/13816
- DOI
- 10.1016/j.ensm.2021.02.013
- Publisher
- Elsevier BV
- Related Researcher
-
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Lee, Yong Min
Battery Materials & Systems LAB
-
Research Interests
Battery; Electrode; Electrolyte; Separator; Simulation
- Files:
There are no files associated with this item.
- Collection:
- Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles
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