Work

Mechanically Adaptive Polyrotaxane Interlayers for Low‐Pressure High Energy Density Sulfide‐Based All‐Solid‐State Batteries

Year: 2026

Type: article

Abstract: 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 (InF 3 ), 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.

Source: Angewandte Chemie

DOI: 10.1002/ange.9531460

Authors: Jihoon Oh, Leonie Braks, Ali Coskun, Jang Wook Choi

Institutions: Seoul National University, Hyundai Motor Group (South Korea), University of Fribourg

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $5,790