Coskun Research Group has published a new article in the journal Angewandte Chemie, titled; "Mechanically Adaptive Polyrotaxane Interlayers for Low-Pressure High Energy Density Sulfide-Based All-Solid-State Batteries".

This work highlights the potential of polyrotaxane-based composite interfaces to improve ASSB performance at practical pressures.

To read the article: https://onlinelibrary.wiley.com/doi/10.1002/anie.9531460

Abstract

All-solid-state batteries (ASSBs) employing lithium (Li) metal anodes or an anode-less configuration, despite their superior energy density, suffer from performance degradation under low stack pressure, hindering their practical application. To address this, we design a mechanically adaptive anode interface that leverages an elastic polymer incorporating mechanically interlocked polyrotaxane (PR). This interface synergistically combines the elastic resilience—derived from the unique ring-sliding motion of PR—with indium fluoride (InF₃), which undergoes spontaneous conversion to form a chemically stable interface. This approach enables robust cycling stability and reliable operation under commercially relevant conditions (25°C, 0.8 MPa), even in an anode-less configuration (N/P = 0), thus demonstrating the potential of mechanically interlocked molecular architectures for maintaining void-free interfaces in low-pressure ASSBs with high energy densities.