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doi:10.22028/D291-28988
Title: | An Ambient Temperature Electrolyte with Superior Lithium Ion Conductivity based on a Self-Assembled Block Copolymer |
Author(s): | Dörr, Tobias S. Pelz, Alexander Zhang, Peng Kraus, Tobias Winter, Martin Wiemhöfer, Hans-Dieter |
Language: | English |
Title: | Chemistry - a European journal |
Volume: | 24 |
Issue: | 32 |
Startpage: | 8061 |
Endpage: | 8065 |
Publisher/Platform: | Wiley |
Year of Publication: | 2018 |
Publikation type: | Journal Article |
Abstract: | In searching for polymer-based electrolytes with improved performance for lithium ion and lithium metal batteries, we studied block copolymer electrolytes with high amounts of bis(trifluoromethane)sulfonimide lithium obtained by macromolecular co-assembly of a poly(isoprene)-block-poly(styrene)-block-poly(ethylene oxide) and the salt from tetrahydrofuran. Particularly, an ultra-short poly(ethylene oxide) block of 2100 g mol-1 was applied, giving rise to 2D continuous lamellar microstructures. The macroscopic stability was ensured with major blocks from poly(isoprene) and poly(styrene), which separated the ionic conductive PEO/salt lamellae. Thermal annealing led to high ionic conductivities of 1.4 mS cm-1 at 20 °C with low activation energy and a superior lithium ion transference number of 0.7, accompanied by an improved mechanical stability (storage modulus of up to 107 Pa). With high Li:O ratios >1, we show a viable concept to achieve fast Li+ transport in block copolymers (BCP), decoupled from slow polymer relaxation. |
DOI of the first publication: | 10.1002/chem.201801521 |
URL of the first publication: | https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/chem.201801521 |
Link to this record: | hdl:20.500.11880/27929 http://dx.doi.org/10.22028/D291-28988 |
ISSN: | 1521-3765 0947-6539 |
Date of registration: | 27-Sep-2019 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Chemie |
Professorship: | NT - Prof. Dr. Tobias Kraus |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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