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New high-throughput methods of investigating polymer electrolytes

New high-throughput methods of investigating polymer electrolytes
New high-throughput methods of investigating polymer electrolytes
Polymer electrolyte films have been prepared by solution casting techniques from precursor solutions of a poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), lithium-bis(trifluoromethane) sulfonimide (LiTFSI), and propylene carbonate (PC). Arrays of graded composition were characterised by electrochemical impedance spectroscopy (EIS), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) using high throughput techniques. Impedance analysis showed the resistance of the films as a function of LiTFSI, PC and polymer content. The ternary plot of conductivity shows an area that combines a solid-like mechanical stability with high conductivity, 1 × 10-5 S cm-1 at the composition 0.55/0.15/0.30 wt% PVdF-HFP/LiTFSI/PC, increasing with PC content. In regions with less than a 50 wt% fraction of PVdF-HFP the films were too soft to give meaningful results by this method. The DSC measurements on solvent free, salt-doped polymers show a reduced crystallinity, and high throughput XRD patterns show that non-polar crystalline phases are suppressed by the presence of LiTFSI and PC.
0378-7753
3355-3359
Alcock, Hannah J.
7e6b7b35-3539-40fb-8e8d-7556e15274a3
White, Oliver C.
087c56ab-58de-4b57-ad56-83df3355700e
Jegelevicius, Grazvydas
c05cc205-32ab-4d93-abf0-daabbb17b1ae
Roberts, Matthew R,
d4443589-ad21-4827-978d-5d30fbf8de0a
Owen, John R
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Alcock, Hannah J.
7e6b7b35-3539-40fb-8e8d-7556e15274a3
White, Oliver C.
087c56ab-58de-4b57-ad56-83df3355700e
Jegelevicius, Grazvydas
c05cc205-32ab-4d93-abf0-daabbb17b1ae
Roberts, Matthew R,
d4443589-ad21-4827-978d-5d30fbf8de0a
Owen, John R
067986ea-f3f3-4a83-bc87-7387cc5ac85d

Alcock, Hannah J., White, Oliver C., Jegelevicius, Grazvydas, Roberts, Matthew R, and Owen, John R (2011) New high-throughput methods of investigating polymer electrolytes. Journal of Power Sources, 196 (6), 3355-3359. (doi:10.1016/j.jpowsour.2010.11.098).

Record type: Article

Abstract

Polymer electrolyte films have been prepared by solution casting techniques from precursor solutions of a poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), lithium-bis(trifluoromethane) sulfonimide (LiTFSI), and propylene carbonate (PC). Arrays of graded composition were characterised by electrochemical impedance spectroscopy (EIS), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) using high throughput techniques. Impedance analysis showed the resistance of the films as a function of LiTFSI, PC and polymer content. The ternary plot of conductivity shows an area that combines a solid-like mechanical stability with high conductivity, 1 × 10-5 S cm-1 at the composition 0.55/0.15/0.30 wt% PVdF-HFP/LiTFSI/PC, increasing with PC content. In regions with less than a 50 wt% fraction of PVdF-HFP the films were too soft to give meaningful results by this method. The DSC measurements on solvent free, salt-doped polymers show a reduced crystallinity, and high throughput XRD patterns show that non-polar crystalline phases are suppressed by the presence of LiTFSI and PC.

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Published date: March 2011

Identifiers

Local EPrints ID: 180757
URI: https://eprints.soton.ac.uk/id/eprint/180757
ISSN: 0378-7753
PURE UUID: ba54f546-c719-4efc-818e-a8b251d3743c
ORCID for John R Owen: ORCID iD orcid.org/0000-0002-4938-3693

Catalogue record

Date deposited: 13 Apr 2011 10:55
Last modified: 05 Nov 2019 02:05

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