A High Capacity All Solid-State Li-Sulfur Battery Enabled by Conversion-Intercalation Hybrid Cathode Architecture

Shiqi Xu, Chun Yuen Kwok, Laidong Zhou, Zhizhen Zhang, Ivan Kochetkov, Linda F. Nazar

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

As demands for electrochemical energy storage continue to rise, alternative electrochemistries to conventional Li-ion batteries become more appealing. Here, an intercalation-conversion hybrid cathode that combines intercalation-type VS2 with conversion-type sulfur chemistry to construct high performance solid-state lithium-sulfur batteries is reported. The layered VS2 nanomaterial features Li-ion transport channels, metallic conductivity, and active capacity contribution, all of which provide an ideal platform for the solid state S/Li2S redox couple to unlock its high gravimetric capacity. The S/VS2/Li3PS4 hybrid cathode composite is prepared by a facile, low-cost, and low-energy mechanical blending process. The S/VS2/Li3PS4|Li3PS4|Li/In (or Li) all-solid-state cell exhibits sulfur utilization of ≈85%, with a Coulombic efficiency of close to 100%. High areal capacity up to 7.8 mA h cm−2 with an active material loading (S/VS2) as high as 15.5 mg cm−2 is achieved.

Original languageEnglish
Article number2004239
JournalAdvanced Functional Materials
Volume31
Issue number2
DOIs
StatePublished - Jan 11 2021
Externally publishedYes

Funding

S.X. and C.Y.K. contributed equally to this work. This work was supported by the Natural Sciences and Engineering Council of Canada (NSERC) through their Discovery and Canada Research Chair program to L.F.N., and a doctoral scholarship (PGS-D) to C.Y.K. The authors also thank Dr. Shahrzad Hosseini Vajargah for their scientific input.

Keywords

  • Li-S batteries
  • all solid-state batteries
  • hybrid cathodes
  • thiophosphate electrolytes
  • vanadium disulfide

Fingerprint

Dive into the research topics of 'A High Capacity All Solid-State Li-Sulfur Battery Enabled by Conversion-Intercalation Hybrid Cathode Architecture'. Together they form a unique fingerprint.

Cite this