期刊
JOULE
卷 4, 期 6, 页码 1311-1323出版社
CELL PRESS
DOI: 10.1016/j.joule.2020.04.002
关键词
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资金
- National Key Research and Development Program of China [2016YFB0100203]
- National Natural Science Foundation of China [21922508, 21673116, 21633003, U1801251]
- Natural Science Foundation of Jiangsu Province of China [BK20190009]
- PAPD of Jiangsu Higher Education Institutions
- Netherlands Organization for Scientific Research (NWO) [15788, 16122]
- Advanced Dutch Energy Materials (ADEM) program of the Dutch Ministry of Economic Affairs, Agriculture, and Innovation
- Chinese Scholarship Council (CSC)
The influence of space-charge layers on the ionic charge transport over cathode-solid electrolyte interfaces in all-solid-state batteries remains unclear because of the difficulty to unravel it from other contributions to the ion transport over the interfaces. Here, we reveal the effect of the space-charge layers by systematically tuning the space-charge layer on and off between LixV2O5 and Li1.5Al0.5Ge1.5(PO3)(4) (LAGP), by changing the LixV2O5 potential and selectively measuring the ion transport over the interface by two-dimensional (2D) NMR exchange. The activation energy is demonstrated to be 0.315 eV for lithium-ion exchange over the space-charge-free interface, which increases dramatically to 0.515 eV for the interface with a space-charge layer. Comparison with a space-charge model indicates that the charge distribution due to the space-charge layer is responsible for the increased interface resistance. Thereby, the present work provides selective and quantitative insight into the effect of space-charge layers over electrode-electrolyte interfaces on ionic transport.
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