Chloride Ion‐Containing Polymeric Ionic Liquids for Application as Electrolytes in Solid‐State Batteries

Abstract

Organic, solid‐state batteries require efficient solid electrolytes able to provide stable ion conduction. Here, solid electrolytes based on ionic liquid (IL) polymers with chloride counterions as electrolyte materials for batteries are presented. Acrylic monomers with imidazolium substituents with alkyl side groups that are linked by alkyl spacers to the acrylic group are employed. The IL monomers with chloride counterions are either converted by thermally initiated radical polymerization into linear homopolymers or incorporated into polymer networks by UV‐initiated copolymerization utilizing a bifunctional, non‐ionic cross‐linker. Both procedures successfully yielded the desired materials, which is confirmed by NMR spectroscopy (linear homopolymers) or Raman spectroscopy (IL networks). The ionic conductivities at room temperature are measured by Electrochemical Impedance Spectroscopy. The ionic conductivities of the linear homopolymers are in the range of 10−4 to 10−6 S cm−1, while those of the IL networks are about two orders of magnitude lower. They increase to 10−4 S cm−1 at 70 °C. The electrochemical stability is examined by Linear Sweep Voltammetry and is proven in the voltage range of −2 to +2 V. The results reveal that the materials represent promising electrolytes for potential solid‐state battery applications.

High-Resolution Tracking of Multiple Distributions in Metallic Nanostructures: Advanced Analysis Was Carried Out with Novel 3D Correlation Thermal Field-Flow Fractionation

“…To apply and validate this analytical concept, we present herein the utility of a novel photoreduction strategy for generating metallic nanostructures composed of gold NPs (Au NPs) supported by imidazolium-containing ionic polymers (IIP) to produce IIP_Au NP nanostructures. IIP_Au NPs are not just a strategic sample matrix; they are also hybrid multifunctional materials with potential applications in energy storage and electronics . Au incorporates complementary optoelectronic and electric properties onto the generic IIP molecule,which is suitable for testing the 3DCoThFFF approach.…”

“…IIP_Au NPs are not just a strategic sample matrix; they are also hybrid multifunctional materials with potential applications in energy storage and electronics. 28 Au incorporates complementary optoelectronic and electric properties onto the generic IIP molecule,which is suitable for testing the 3DCoThFFF approach. In addition, it provides the necessary contrast for generating high-resolution micrographs from electron microscopy, which is essential for the visual analysis of the microstructure.…”

Optimizing the Ion Conductivity and Mechanical Stability of Polymer Electrolyte Membranes Designed for Use in Lithium Ion Batteries: Combining Imidazolium-Containing Poly(ionic liquids) and Poly(propylene carbonate)

“…The molar mass determination of these polymers is challenging due to interactions with the typical column materials used for size exclusion chromatography (SEC). For this purpose, we applied thermal field-flow fractionation (ThFFF), which is based on an open-channel separation and avoids such interactions [47]. An additional challenge was the detection and reliable molar mass calculation using the usually applied refractive index (dRI) and multiangle light scattering (MALS) detection.…”

Advanced research and prospects on polymer ionic liquids: trends, potential and application

“…The aim of the research 53 was to create new liquid polymeric materials as polymeric electrolytes for organic solid-state batteries. Polymers with chloride counterions based on acrylic ionic liquid monomers with a stepwise changing chemical structure were synthesized and investigated.…”