Revealing the Impact of Space-Charge Layers on the Li-Ion Transport in All-Solid-State Batteries

By Zhu Cheng, Meilin Liu, S. Ganapathy, Chao Li, Zhaolong Li, Xiaoyu Zhang, P. He, Haoshen Zhou, M. Wagemaker. 2020

173 citations recorded by the source corpus.

Summary 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.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/0d2e66b981bac8ba919a60262f379542a9a533f6

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In Automotive Engineering

  1. Liga Britala
  2. M. Marinaro
  3. G. Kučinskis

In Electrical and Electronic Engineering

  1. Liga Britala
  2. M. Marinaro
  3. G. Kučinskis

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