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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Théato, Patrick
Karlsruhe Institute of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Synthesis of Polyimide-PEO Copolymers: Toward thermally stable solid polymer electrolytes for Lithium-Metal batteriescitations
- 2024Degradation of Styrene-Poly(ethylene oxide)-Based Block Copolymer Electrolytes at the Na and K Negative Electrode Studied by Microcalorimetry and Impedance Spectroscopycitations
- 2023Magnesium Polymer Electrolytes Based on the Polycarbonate Poly(2-butyl-2-ethyltrimethylene-carbonate)
- 2023Improved Route to Linear Triblock Copolymers by Coupling with Glycidyl Ether-Activated Poly(ethylene oxide) Chainscitations
- 2023Photoresponsive Spiropyran and DEGMA‐Based Copolymers with Photo‐Switchable Glass Transition Temperaturescitations
- 2023Poly(ethylene oxide)-grafted Polycarbonates as Solvent-free Polymer Electrolytes for Lithium-Metal Batteries
- 2022Inverse Vulcanization of Norbornenylsilanes: Soluble Polymers with Controllable Molecular Properties via Siloxane Bondscitations
- 2022Synthesis and Characterization of Novel Isosorbide‐Based Polyester Derivatives Decorated with α ‐Acyloxy Amidescitations
- 2022Synthesizing Polyethylene from Polyacrylates: A Decarboxylation Approachcitations
- 2021Synthesis and Post-Polymerization Modification of Poly(N-(4-Vinylphenyl)Sulfonamide)scitations
- 2020The toolbox of porous anodic aluminum oxide–based nanocomposites: from preparation to applicationcitations
- 2020A CO$_{2}$-gated anodic aluminum oxide based nanocomposite membrane for de-emulsificationcitations
Places of action
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document
Poly(ethylene oxide)-grafted Polycarbonates as Solvent-free Polymer Electrolytes for Lithium-Metal Batteries
Abstract
Solid-state electrolytes are considered to be a crucial step to increase the safety of battery cells, as well as allowing the employment of lithium metal anodes which achieve much higher energy densities. To this point, only materials based on poly(ethylene oxide) (PEO) have been commercially employed as such. In an effort to improve the understanding of PEO-based polymer electrolytes, the synthesis of an aliphatic polycarbonate bearing PEO sidechains via a thiol-ene post-polymerization modification approach is described. The complete suppression of crystallization in the system for all four PEO sidechain lengths was demonstrated. The influence of the sidechains lengths and different LiTFSI concentrations on the thermal behavior and the ionic conductivity of the polymer electrolyte was illustrated in a systematic approach. The PEO sidechain with around 12 repeating units displayed some positive interactions with the polycarbonate backbone, resulting especially in quite high lithium ion transference numbers for a PEO-based electrolyte with up to 0.19. Ultimately, the highest ionic conductivity achieved for this system was 9.9e-3 mS/cm at ambient temperature and 2.3e-1 mS/cm at 70 °C with the PEO sidechain containing 23 repeating units. Unfortunately, these polymer electrolytes were very lacking in mechanical stability, resembling a honey-like, highly viscous mass. Two different solidification approaches were examines to improve the mechanical properties. Controlled thiol-ene crosslinking yielded highly flexible solid films that could still achieve an ionic conductivity one order of magnitude worse than the grafted system. The second approach planned on the integration of a polystyrene block, but control over the polymerizations was insufficient and the resulting polymer electrolyte films were very brittle and demonstrated a noticeable loss of ionic conductivity. Nonetheless, a deeper insight into the structure-property relationship of PEO-grafted polymer electrolytes was provided, strengthening the understanding of PEO sidechain architectures. The demonstrated system of PC-gr-PEO showcased some interesting properties that warrant further investigation.