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Description:

Solid-state lithium metal batteries, assumed to show improved safety and high energy density, have garnered growing interest. Nevertheless, establishing an effective ionic conduction pathway within the composite positive electrode remains challenging, especially with high-active- materials mass-loading in the electrode. Herein, we develop a high-active-mass loading positive electrode for solid-state Li metal rechargeable batteries, optimized for operation at an elevated temperature of 60°C. The electrode is based on NMC622 as active material, incorporating the ionic liquid Pyr14TFSI and LiTFSI (combined-electrolyte, cE). The positive electrode membranes are successfully prepared by preventing undesired gelation of the slurry solution and seamlessly integrating them with a thin-film multilayer hybrid solid electrolyte. Notably, the NMC622-based electrode with 10 wt% of cE achieves a specific capacity exceeding 160 mAh g−1 at a high mass loading of 40 mg cm−2. The methodology demonstrated in the present study highlights the potential of incorporating a cE into cathode compositions for high energy density solid-state Li metal batteries.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: lithium metal battery

Date published: 2026-05-15

Publisher: Wiley

Journal:

• Batteries & Supercaps (ISSN: 25666223) vol. 9 issue. 5 e70329

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1002/batt.70329

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Updated at: 2026-07-14 10:44:51 +0900

Published on MDR: 2026-07-14 12:30:12 +0900