Spectroscopic Investigation of Composite Polymeric and Monocrystalline Systems with Ionic Conductivity

Radziuk, Darya; Möhwald, Helmuth

doi:10.3390/polym3020674

Cited by 12 publications

(7 citation statements)

References 36 publications

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“…The strong band at 1349 cm −1 can be assigned to CH 2 wagging vibration, and it is related to the EO methylene wagging vibrations of the gauche conformation, whereas the weak band at 1250 cm −1 may be related to CH 2 twisting mode, both of which are characteristic of the amorphous state [50][51][52].…”

Section: Resultsmentioning

confidence: 99%

Demicellization of Polyethylene Oxide in Water Solution under Static Magnetic Field Exposure Studied by FTIR Spectroscopy

Calabrò

Magazù

2013

Advances in Physical Chemistry

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FTIR spectroscopy was used to investigate the alterations of the vibration bands in the mid-infrared region of Polyethylene oxide in aqueous solution at 25 mg/mL concentration under exposure up to 4 h to a static magnetic field at 200 mT. FTIR spectroscopic analysis of PEO solution in the range 3500–1000 cm−1 evidenced the stretching vibrations of ether band, C–H symmetric-antisymmetric and bending vibrations of methylene groups, and the C–O–C stretching band. A significant decrease in intensity of symmetric and asymmetric stretching CH2 vibration bands occurred after 2 h and 4 h of exposure, followed by a significant decrease in intensity of scissoring bending in plane CH2 vibration around 1465 cm−1. Finally, the C–O–C stretching band around 1080 cm−1 increased in intensity after 4 h of exposure. This result can be attributed to the increase of formation of the intermolecular hydrogen bonding that occurred in PEO aqueous solution after SMF exposure, due to the reorientation of PEO chain after exposure to SMF. In this scenario, the observed decrease in intensity of CH2 vibration bands can be understood as well considering that the reorientation of PEO chain under the applied SMF induces PEO demicellization.

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Section: Resultsmentioning

confidence: 99%

Demicellization of Polyethylene Oxide in Water Solution under Static Magnetic Field Exposure Studied by FTIR Spectroscopy

Calabrò

Magazù

2013

Advances in Physical Chemistry

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“…The peak at ∼517 cm −1 is assigned to −CF 3 bending from the electrolyte. 55 Therefore, this peak does not shift during reduction/oxidation and is independent of cell potential changes. However, as shown in Figure 10a, a new peak appears as the cell is discharged (highlighted with red arrows).…”

Section: ■ Experimental Methodsmentioning

confidence: 94%

In Operando FTIR Study on the Effect of Sulfur Chain Length in Sulfur Copolymer-Based Li–S Batteries

et al. 2022

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Synthesis of sulfur-rich copolymers using the inverse vulcanization reaction is a practical approach to modify the sulfur active material for enhanced stability in Li–S batteries. However, to effectively design such polymers, a thorough understanding of the underlying redox mechanisms is critical. Here, we study electrochemical behavior of sulfur-rich copolymers using in operando FTIR spectroscopy with attenuated total reflection. We used sulfur-diisopropenylbenzene copolymers [poly(S-co-DIB)] as the active material in Li–S batteries and monitored the evolution of the C–S peak position and cyclic changes in the S–S bond stretching at different potentials during discharge and charge. Moreover, we synthesized various copolymers with sulfur wt % of 80 and 30 wt % and compared the electrochemical behavior and their corresponding IR response during cyclic voltammetry sweep. Our results indicated that the C–S bond in sulfur copolymers is not active in the voltage window of Li–S batteries. Moreover, we showed that the shift in the C–S peak position becomes smaller with increase in the monomer wt %. In addition, the S–S stretching peak at ∼500 cm–1 diminishes when the sulfur wt % is decreased from 80 to 30 wt %, highlighting a significant change in electrochemical behavior of the copolymers.

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“…However, both extremely low wettability with liquid electrolytes and weak thermal stability have limited its further application in energy storage systems especially in hybrid electric vehicles (HEVs) areas [ 4 , 5 , 6 ]. To remedy the above defects, different kinds of separators were reported, such as polymers’ surface grafting modification of polyolefin separators [ 7 , 8 , 9 ], ceramic coating separators [ 6 , 10 , 11 , 12 , 13 , 14 ], nonwoven membrane [ 15 , 16 , 17 , 18 , 19 , 20 ] and polymer electrolyte used as separators [ 21 , 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

A Modified Ceramic-Coating Separator with High-Temperature Stability for Lithium-Ion Battery

Shi

Dai

et al. 2017

Polymers

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Abstract:In this work, the ceramic coating separator (CCS-CS) prepared with polyethylene (PE) separator, Al 2 O 3 inorganic particles, carboxymethyl cellulose sodium (CMC) and styrene-butadiene rubber (SBR) mix binders is further modified by coating with a thin polydopamine (PDA) layer through a simple chemical deposition method. Compared with the bare ceramic coating separator, the PDA-modified CCS-CS (CCS-CS-PDA) exhibits excellent thermal stability, which shows no thermal shrinkage after storing at 200 • C for 30 min. Compared with the PE separator, both the uptake and wettability with the electrolyte and water of CCS-CS-PDA are improved significantly. Meanwhile, when saturated with liquid electrolyte, the CCS-CS-PDA also shows enabled high ionic conductance. Furthermore, the test of the electrochemical impedances changing with the temperatures suggests that only the PE separator exhibits no thermal shutdown behaviors, and the CCS-CS separator only has a shutdown temperature range from 138 to 160 • C, while the CCS-CS-PDA shows a shutdown temperature range from 138 to more than 200 • C. The cells prepared with the CCS-CS-PDA also show stable repeated cycling performance and good rate capacity at room temperature.

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Spectroscopic Investigation of Composite Polymeric and Monocrystalline Systems with Ionic Conductivity

Cited by 12 publications

References 36 publications

Demicellization of Polyethylene Oxide in Water Solution under Static Magnetic Field Exposure Studied by FTIR Spectroscopy

Demicellization of Polyethylene Oxide in Water Solution under Static Magnetic Field Exposure Studied by FTIR Spectroscopy

In Operando FTIR Study on the Effect of Sulfur Chain Length in Sulfur Copolymer-Based Li–S Batteries

A Modified Ceramic-Coating Separator with High-Temperature Stability for Lithium-Ion Battery

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