Artificial Solid Interphase Research Articles

Li Metal Anode Stabilized By Artificial Solid Interphase with Polymers of Intrinsic Microporosity

Lithium metal has drawn attention as one of the most promising anode materials because of its highest specific capacity and lowest working potential. However, poor capacity retention and dendrite formation during cycling mainly caused by high chemical reactivity of Li metal with the electrolyte still remain challenges for practical battery application. In this presentation, we demonstrate that polymers of intrinsic microporosity(PIM-1) is highly effective in stabilizing the interface between Li metal anode and the electrolyte as an artificial solid interphase using various analytical techniques and electrochemical characterization techniques. We found a desolvation effect of electrolyte by PIM-1 coating through size-sieving, thereby forming the uniform and stable lithium deposition during cycling. Highly stable artificial solid interphase with polymers of intrinsic microporosity improved the interfacial stability and electrochemical performance of Li metal anode. The electrochemical performance and morphological change of lithium metal anode will be discussed in more detail in the presentation.

An artificial solid interphase with polymers of intrinsic microporosity for highly stable Li metal anodes.

Polymers of intrinsic microporosity (PIM-1) have an appropriate pore size to reduce the solvation number of Li ions in electrolytes. This unique pore structure of PIM-1 as a solid interphase can suppress transport of solvent and consequently unwanted chemical reactions at the interface of anodes, thereby extending the cycle life of Li metal anodes.