Lithium-Ion Charged Polymer Channels Flattening Lithium Metal Anode

Abstract

Highlights The LiNO3-implanted electroactive β phase polyvinylidene fluoride-co-hexafluoropropylene was built as an artificial solid electrolyte interphase layer for dendrite suppression. The electronegatively charged polymer layer can capture Li ion on its surface to form Li-ion charged channels and recompense the ionic flux of electrolytes via continuous supply of Li ion. The modified Li anode achieved a long cycle life over 2000 h under ultrahigh Li utilization of 50% in symmetric cell and worked in full cell for 100 cycles at harsh condition of extremely low N/P of 0.83.

Keywords

• Polymer ionic channel
• Li metal batteries
• Artificial protective layer
• Uniform Li deposition
• Electrochemical performances