Pritzker School of Molecular Engineering
Published July 8, 2023 | Version v1
Journal article Open

Weakly coordinated Li ion in single-ion-conductor-based composite enabling low electrolyte content Li-metal batteries

Creators

  • 1. Korea Advanced Institute of Science and Technology
  • 2. Korea Research Institute of Chemical Technology
  • 3. Ulsan National Institute of Science and Technology
  • 4. University of Chicago

Description

The pulverization of lithium metal electrodes during cycling recently has been suppressed through various techniques, but the issue of irreversible consumption of the electrolyte remains a critical challenge, hindering the progress of energy-dense lithium metal batteries. Here, we design a single-ion-conductor-based composite layer on the lithium metal electrode, which significantly reduces the liquid electrolyte loss via adjusting the solvation environment of moving Li+ in the layer. A Li||Ni0.5Mn0.3Co0.2O2 pouch cell with a thin lithium metal (N/P of 2.15), high loading cathode (21.5 mg cm−2), and carbonate electrolyte achieves 400 cycles at the electrolyte to capacity ratio of 2.15 g Ah−1 (2.44 g Ah−1 including mass of composite layer) or 100 cycles at 1.28 g Ah−1 (1.57 g Ah−1 including mass of composite layer) under a stack pressure of 280 kPa (0.2 C charge with a constant voltage charge at 4.3 V to 0.05 C and 1.0 C discharge within a voltage window of 4.3 V to 3.0 V). The rational design of the single-ion-conductor-based composite layer demonstrated in this work provides a way forward for constructing energy-dense rechargeable lithium metal batteries with minimal electrolyte content.

Data availability

All relevant data that support the findings of this study are presented in the article, Supplementary Information. Source data are provided as a Source data file. Source data are provided with this paper.

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Additional details

Identifiers

DOI
10.1038/s41467-023-39673-1
Other
oai:uchicago.tind.io:6673

Funding

KAIST Institute for Nano-Century (KINC)
National Research Foundation of Korea
Technology Development Program to Solve Climate Changes

UChicago Information

Division(s)
Pritzker School of Molecular Engineering