Dual‐phase solid polymer electrolytes prepared from styrene–butadiene copolymer latices

Ichino, Toshihiro; Matsumoto, Michito; Rutt, J. Steven; Nishi, S.

doi:10.1002/pola.1993.080310708

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…To improve both conductivity and strength, dual-phase polymer electrolytes by polyblends nitrobutyronitrile and styrene butadiene rubber were proposed, [7][8][9][10][11][12] which consist of a polar polymer to take up lithium salt solution and a nonpolar polymer to provide the strength. Results from this laboratory on the WPU(PTMG)/PEO based electrolyte system 13 proved to possess the dual phase characteristics of polymer composites in which PEO absorbs LiClO 4 -PC to form the ion conducting phase whereas WPU(PTMG) only provides the strength.…”

Section: Introductionmentioning

confidence: 99%

Blending thermoplastic polyurethanes and poly(ethylene oxide) for composite electrolytes via a mixture design approach

Wen

Chen

2000

J. Appl. Polym. Sci.

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ABSTRACT:With the aim of obtaining proper composite electrolytes, a systematic modeling analysis for the percentage increase in weight due to swelling with respect to swollen weight, S w , and the room temperature conductivity ( 25 ) of the composite films of polyethylene glycol based thermoplastic polyurethane/polytetramethylene glycol based thermoplastic polyurethane/polyethylene oxide [denoted as TPU(PEG)/TP-U(PTMG)/PEO] was performed. Using a mixture design approach, empirical models are fitted and plotted as contour diagrams which facilitate revealing the synergistic/antagonistic effects among the mixed polymers. The contour plot results show that both the maximum S w (64.9%) and the maximum 25 (72.2 ϫ 10 Ϫ5 S cm Ϫ1) appear at point X 3 (PEO 85%, TPU(PEG) 15%). The results are reasonably explained from the interactions among polymers on the basis of their molecular structures. The thermal analysis of the composite films is performed to demonstrate the speculations about the interactions among the mixed polymers by using differential scanning calorimeter. The crystallization of PEO spherulites at different compositions was examined by using a polarizing microscope.

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Section: Introductionmentioning

confidence: 99%

Blending thermoplastic polyurethanes and poly(ethylene oxide) for composite electrolytes via a mixture design approach

Wen

Chen

2000

J. Appl. Polym. Sci.

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“…Not only high ionic conductivities but also high mechanical strengths are required in polymer electrolytes, especially in the production process of lithium secondary batteries. To satisfy these requirements, we used the mixed latices to make a latex mixture film having these two features, [5][6][7][8] though latices are generally used as binders and addition agents of inorganic compounds. 9 -13 We immersed the SBR/NBR latex mixture film, which was the precursor of the polymer electrolyte, into a liquid electrolyte to form a new type of polymer electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Physical properties and structure of a poly(styrene-co-butadiene) rubber/poly(acrylonitrile-co-butadiene) rubber latex mixture film

Takeshita¹,

Ichino²,

Nishi³

1998

J. Polym. Sci. A Polym. Chem.

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The physical properties and the structure of a poly(styrene‐co‐butadiene) rubber (SBR) and poly(acrylonitrile‐co‐butadiene) rubber (NBR) latex mixture film are studied in relation to the composition of SBR/NBR for optimization as the precursor of a polymer electrolyte. The composition of SBR50/NBR50 is most suitable in terms of mechanical strength and ionic conductivity. The relationship between the mechanical strength and the structure is analyzed using a simple equivalent mechanical model modified from the Takayanagi model. Our model gives better agreement with experimental results and extends the range of validity of the model to the cocontinuous phase type morphologies. It is possible to estimate the mechanical strength from the continuity of the mechanical supporting phase, calculated from the mechanical model. The tensile properties are found to be strongly affected by the fragile component. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. A Polym. Chem. 36: 2493–2501, 1998

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“…In recent years, our group has proposed dual-phase polymer electrolytes (DPE) in which one phase provides high ionic conductivity and the other provides mechanical strength. [8][9][10][11] In our initial work, 8 we investigated a DPE prepared from latex films of poly(styrene-co-butadiene) rubber (SBR) impregnated with lithium salts. As the dispersion medium (water) was removed from the latex-salt mixture, ion-conductive channels consisting of lithium salt and polar solvent were built at the interface of SBR latex particles to form a network structure [confirmed by transmission electron microscopy (TEM) observation].…”

Section: Introductionmentioning

confidence: 99%

Polymer Electrolytes with Multiple Conductive Channels Prepared from NBR/SBR Latex Films Impregnated with Lithium Salt and Plasticizer

Matsumoto¹,

Rutt

Nishi

1995

J. Electrochem. Soc.

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Polymer electrolytes with high ionic conductivity (>10 -3 S/cm) and good tensile strength were prepared by swelling poly(acrylonitrile-co-butadiene) (NBR)/poly(styrene-ce-butadiene) (SBR)/LiC104 latex films with ~y-butyrolactone (~/-BL) or LiCIOJ~/-BL plasticizer. Before swelling, the LiCIQ phase is formed at the particle interface. After plasticization, two ion-conductive channels are present: the LiCIQ phase is present at the interface of the latex particles, and the NBR phase is formed from NBR latex particles. These regions are polar and impregnated selectively with polar ~-BL solvent or LiCIOj~/-BL solution, building primary and secondary ion-conductive channels, respectively. The SBR phase (formed from SBR latex particles) is nenpolar and not impregnated, providing a mechanically supportive matrix. High ionic conductivity on the order of 10 -3 S/cm is achieved when NBR/SBR(50/50)/LiCIO4 latex film was saturated with 0.2 to 0.4M LiCIQ/~y-BL solutions. Various microscopic and macroscopic analyses suggest that two types of ion-conductive channels exist in the polymer electrolyte film.

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Dual‐phase solid polymer electrolytes prepared from styrene–butadiene copolymer latices

Cited by 10 publications

References 6 publications

Blending thermoplastic polyurethanes and poly(ethylene oxide) for composite electrolytes via a mixture design approach

Blending thermoplastic polyurethanes and poly(ethylene oxide) for composite electrolytes via a mixture design approach

Physical properties and structure of a poly(styrene-co-butadiene) rubber/poly(acrylonitrile-co-butadiene) rubber latex mixture film

Polymer Electrolytes with Multiple Conductive Channels Prepared from NBR/SBR Latex Films Impregnated with Lithium Salt and Plasticizer

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