Skip to main content
placeholder image

Fatigue-Resistant Interfacial Layer for Safe Lithium Metal Batteries

Journal Article


Abstract


  • The plating/stripping of Li dendrites can fracture the static solid electrolyte interphase (SEI) and cause significant dynamic volume variations in the Li anode, which give rise to poor cyclability and severe safety hazards. Herein, a tough polymer with a slide-ring structure was designed as a self-adaptive interfacial layer for Li anodes. The slide-ring polymer with a dynamically crosslinked network moves freely while maintaining its toughness and fracture resistance, which allows it can to dissipate the tension induced by Li dendrites on the interphase layer. Moreover, the slide-ring polymer is highly stretchable, elastic, and displays an ultrafast self-healing ability, which allows even pulverized Li to remain coalesced without disintegrating upon consecutive cycling. The Li anodes demonstrate greatly improved suppression of Li dendrite formation, as evidenced by the high critical current density (6 mA cm−2) and stable cycling for the full cells with high-areal capacity LiFePO4, high-voltage NCM, and S cathodes.

Publication Date


  • 2021

Citation


  • Gao, R. M., Yang, H., Wang, C. Y., Ye, H., Cao, F. F., & Guo, Z. P. (2021). Fatigue-Resistant Interfacial Layer for Safe Lithium Metal Batteries. Angewandte Chemie - International Edition, 60(48), 25508-25513. doi:10.1002/anie.202111199

Scopus Eid


  • 2-s2.0-85117792410

Start Page


  • 25508

End Page


  • 25513

Volume


  • 60

Issue


  • 48

Abstract


  • The plating/stripping of Li dendrites can fracture the static solid electrolyte interphase (SEI) and cause significant dynamic volume variations in the Li anode, which give rise to poor cyclability and severe safety hazards. Herein, a tough polymer with a slide-ring structure was designed as a self-adaptive interfacial layer for Li anodes. The slide-ring polymer with a dynamically crosslinked network moves freely while maintaining its toughness and fracture resistance, which allows it can to dissipate the tension induced by Li dendrites on the interphase layer. Moreover, the slide-ring polymer is highly stretchable, elastic, and displays an ultrafast self-healing ability, which allows even pulverized Li to remain coalesced without disintegrating upon consecutive cycling. The Li anodes demonstrate greatly improved suppression of Li dendrite formation, as evidenced by the high critical current density (6 mA cm−2) and stable cycling for the full cells with high-areal capacity LiFePO4, high-voltage NCM, and S cathodes.

Publication Date


  • 2021

Citation


  • Gao, R. M., Yang, H., Wang, C. Y., Ye, H., Cao, F. F., & Guo, Z. P. (2021). Fatigue-Resistant Interfacial Layer for Safe Lithium Metal Batteries. Angewandte Chemie - International Edition, 60(48), 25508-25513. doi:10.1002/anie.202111199

Scopus Eid


  • 2-s2.0-85117792410

Start Page


  • 25508

End Page


  • 25513

Volume


  • 60

Issue


  • 48