Jump to main content
Jump to site search


Fe3S4@Li7P3S11 nanocomposites as cathode materials for all-solid-state lithium batteries with improved energy density and low cost

Author affiliations

Abstract

All-solid-state lithium batteries are considered as one of the most promising alternatives to traditional lithium-ion batteries because of their high safety and high energy density. In order to further improve the energy density of all-solid-state lithium batteries, sulfide electrodes with high theoretical capacities and solid electrolytes with high ionic conductivities have been widely explored and successfully demonstrated in all-solid-state lithium batteries. However, the interfacial resistance arising from poor interfacial compatibility and loose contact seriously hinders the electrochemical performances of all-solid-state lithium batteries. Fe3S4 ultrathin nanosheets with a thickness of 15 nm are synthesized by a facile polyvinyl alcohol-assisted precipitation method. In order to achieve intimate contact between sulfide electrodes and sulfide solid electrolytes, Fe3S4 nanosheets are in situ coated with Li7P3S11 and employed as cathode materials in Li/75% Li2S–24% P2S5–1% P2O5/Li10GeP2S12/Fe3S4@Li7P3S11 all-solid-state lithium batteries to investigate their electrochemical performances. Fe3S4@Li7P3S11 nanocomposite electrodes exhibit higher discharge capacity and better rate capability than pristine Fe3S4 nanosheets. After 200 cycles, the discharge capacity remained at a high value of 1001 mA h g−1 at a current density of 0.1 A g−1. The superior cycling stability could be ascribed to intimate contact and low charge transfer resistance at the interface between electrodes and solid electrolytes.

Graphical abstract: Fe3S4@Li7P3S11 nanocomposites as cathode materials for all-solid-state lithium batteries with improved energy density and low cost

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Sep 2017, accepted on 26 Oct 2017 and first published on 26 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA07972A
Citation: J. Mater. Chem. A, 2017, Advance Article
  •   Request permissions

    Fe3S4@Li7P3S11 nanocomposites as cathode materials for all-solid-state lithium batteries with improved energy density and low cost

    Q. Zhang, J. P. Mwizerwa, H. Wan, L. Cai, X. Xu and X. Yao, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA07972A

Search articles by author

Spotlight

Advertisements