Green Polymer Electrolytes Based on Polycaprolactones for Solid‐State High‐Voltage Lithium Metal Batteries
Abstract
Solid polymer electrolytes (SPEs) have attracted considerable attention for high energy solid‐state lithium metal batteries (LMBs). In this work, potentially ecofriendly, solid‐state poly(ε‐caprolactone) (PCL)‐based star polymer electrolytes with cross‐linked structures (xBt‐PCL) are introduced that robustly cycle against LiNi0.6Mn0.2Co0.2O2 (NMC622) composite cathodes, affording long‐term stability even at higher current densities. Their superior features allow for sufficient suppression of dendritic lithium deposits, as monitored by 7Li solid‐state NMR. Advantageous electrolyte|electrode interfacial properties derived from cathode impregnation with 1.5 wt% PCL enable decent cell performance until up to 500 cycles at rates of 1C (60 °C), illustrating the high potential of PCL‐based SPEs for application in high‐voltage LMBs.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 30, 2022
- Source ID
- 10.1002/marc.202200335
Entities
People
- Aditya Choudhary
- Dmitry Bedrov
- Gunther Brunklaus
- Johannes Helmut Thienenkamp
- Kun Ling Liu
- Lennart Wichmann
- Martin Winter
- Yi‐Hsuan Chen
- Yi‐chen Hsieh
Organizations
- Federal Ministry of Research, Technology and Space
- Helmholtz Association of German Research Centres
- United States Army Research Laboratory
- University of Münster
- University of Utah