Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending
Abstract Hybrid electrolytes are developed to meet the requirements of safety, performance, and manufacturing for electrolytes suitable for Li‐ion batteries with Li‐anodes. Recent challenges—in addition to these key properties—emphasize the importance of sustainability. While compromising between th...
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doaj-3a1e1d81379840b6a5fd2131ccb76e042021-05-18T06:03:09ZengWiley-VCHElectrochemical Science Advances2698-59772021-05-0112n/an/a10.1002/elsa.202000029Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blendingMaike Wirtz0Max Linhorst1Philipp Veelken2Hermann Tempel3Hans Kungl4Bruno M. Moerschbacher5Rüdiger‐A. Eichel6Institute of Energy and Climate Research – Fundamental Electrochemistry (IEK‐9) Forschungszentrum Jülich Jülich GermanyInstitute for Biology and Biotechnology of Plants University of Münster Münster GermanyInstitute of Energy and Climate Research – Fundamental Electrochemistry (IEK‐9) Forschungszentrum Jülich Jülich GermanyInstitute of Energy and Climate Research – Fundamental Electrochemistry (IEK‐9) Forschungszentrum Jülich Jülich GermanyInstitute of Energy and Climate Research – Fundamental Electrochemistry (IEK‐9) Forschungszentrum Jülich Jülich GermanyInstitute for Biology and Biotechnology of Plants University of Münster Münster GermanyInstitute of Energy and Climate Research – Fundamental Electrochemistry (IEK‐9) Forschungszentrum Jülich Jülich GermanyAbstract Hybrid electrolytes are developed to meet the requirements of safety, performance, and manufacturing for electrolytes suitable for Li‐ion batteries with Li‐anodes. Recent challenges—in addition to these key properties—emphasize the importance of sustainability. While compromising between these three objectives, the currently available materials are still well below the targeted goals. Three important issues for the design of hybrid electrolytes are (i) the role of the morphology and surface state of the ceramic particles in the polymer matrix, (ii) the dependence of salt concentration and ionic conductivity and, (iii) the effects of substituting part of the polyethylene oxide (PEO), with biopolymers. Electrolyte films were prepared from PEO, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), Li6.5La3Zr1.5Ta0.5O12 (LLZO:Ta), and biopolymers with varying contents of these components by a solution casting method. The films were analyzed with respect to structural and microstructural characteristics by DSC, Raman spectroscopy, and SEM. Ionic conductivity was evaluated by electrochemical impedance spectroscopy. Most interesting, when comparing films with LLZO:Ta versus without, the content of LiTFSI required for the maximum conductivity in the respective systems is different: a higher LiTFSI concentration is required for the former type. Overall, addition of LLZO:Ta as well as partial substitution of PEO by chitosan mesylate or cellulose acetate decrease the ionic conductivity. Thus—at least in the present approaches—a loss in performance is the drawback from attempts to enhance the safety by LLZO:Ta additions and sustainability by biopolymer blending of hybrid electrolytes.https://doi.org/10.1002/elsa.202000029Hybrid electrolytepolymer electrolyteTa substituted LLZOLiTFSI concentrationbiopolymer blending |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maike Wirtz Max Linhorst Philipp Veelken Hermann Tempel Hans Kungl Bruno M. Moerschbacher Rüdiger‐A. Eichel |
spellingShingle |
Maike Wirtz Max Linhorst Philipp Veelken Hermann Tempel Hans Kungl Bruno M. Moerschbacher Rüdiger‐A. Eichel Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending Electrochemical Science Advances Hybrid electrolyte polymer electrolyte Ta substituted LLZO LiTFSI concentration biopolymer blending |
author_facet |
Maike Wirtz Max Linhorst Philipp Veelken Hermann Tempel Hans Kungl Bruno M. Moerschbacher Rüdiger‐A. Eichel |
author_sort |
Maike Wirtz |
title |
Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending |
title_short |
Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending |
title_full |
Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending |
title_fullStr |
Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending |
title_full_unstemmed |
Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending |
title_sort |
polyethylene oxide‐li6.5la3zr1.5ta0.5o12 hybrid electrolytes: lithium salt concentration and biopolymer blending |
publisher |
Wiley-VCH |
series |
Electrochemical Science Advances |
issn |
2698-5977 |
publishDate |
2021-05-01 |
description |
Abstract Hybrid electrolytes are developed to meet the requirements of safety, performance, and manufacturing for electrolytes suitable for Li‐ion batteries with Li‐anodes. Recent challenges—in addition to these key properties—emphasize the importance of sustainability. While compromising between these three objectives, the currently available materials are still well below the targeted goals. Three important issues for the design of hybrid electrolytes are (i) the role of the morphology and surface state of the ceramic particles in the polymer matrix, (ii) the dependence of salt concentration and ionic conductivity and, (iii) the effects of substituting part of the polyethylene oxide (PEO), with biopolymers. Electrolyte films were prepared from PEO, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), Li6.5La3Zr1.5Ta0.5O12 (LLZO:Ta), and biopolymers with varying contents of these components by a solution casting method. The films were analyzed with respect to structural and microstructural characteristics by DSC, Raman spectroscopy, and SEM. Ionic conductivity was evaluated by electrochemical impedance spectroscopy. Most interesting, when comparing films with LLZO:Ta versus without, the content of LiTFSI required for the maximum conductivity in the respective systems is different: a higher LiTFSI concentration is required for the former type. Overall, addition of LLZO:Ta as well as partial substitution of PEO by chitosan mesylate or cellulose acetate decrease the ionic conductivity. Thus—at least in the present approaches—a loss in performance is the drawback from attempts to enhance the safety by LLZO:Ta additions and sustainability by biopolymer blending of hybrid electrolytes. |
topic |
Hybrid electrolyte polymer electrolyte Ta substituted LLZO LiTFSI concentration biopolymer blending |
url |
https://doi.org/10.1002/elsa.202000029 |
work_keys_str_mv |
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