Fumed silica-based composite polymer electrolytes: synthesis, rheology, and electrochemistry

Walls, Howard; Zhou, Jian; Yerian, Jeffrey Alan; Fedkiw, Peter S.; Khan, Saad A.; Stowe, Micah Kristin; Baker, Gregory L.

doi:10.1016/s0378-7753(00)00424-9

Cited by 155 publications

(119 citation statements)

References 16 publications

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“…For example, in polymer electrolytes formed with polyethylene oxide (PEO), the fillers affect the polymer dipoles orientation in their ability to align dipole moments [3], whereas the thermal history determines the flexibility of the polymer chains for ion migration [2]. Usually, the addition of fillers in SPE like PEO with alkaline salts, improves the transport properties, the resistance to crystallization, and the stability of the electrode/electrolyte interface [2,4].…”

Section: Introductionmentioning

confidence: 99%

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Delgado-Rosero

Jurado-Meneses

Meléndez‐Lira

2017

Rev. Fac. Ing. Univ. Antioquia

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ABSTRACT:Composites formed by combinations of polyethylene oxide (PEO) and sodium trifluoroacetate (CF 3 COONa) with different aluminum oxide (Al 2 O 3 ) concentrations were synthetized. Infrared (IR), Raman spectroscopy, X ray diffraction (XRD) and atomic force microscopy (AFM) analyses, were performed to characterize the composites. Changes on the XRD intensity peaks, and variations in intensity and position of some peaks in Raman and IR spectroscopy were observed for different concentrations of added Al 2 O 3 . The decrease in the XRD peaks of the PEO when it is combined with the salt, revealed that crystallinity in polymer was reduced, being lower when the alumina is added. The increase in roughness root medium square (R RMS ) observed by AFM when Al 2 O 3 was added, agree with reduction in crystallinity observed with XRD studies. Changes in the structure of PEO showed in the absorption lines IR and Raman, due to addition of CF 3 COONa salt and Al 2 O 3 filler, have been attributed to the interactions between the electrolyte and the filler. RESUMEN:Se sintetizaron compósitos formados entre polióxido de etileno (PEO) y trifluoroacetato de sodio (PEO 10 CF 3 COONa) con diferentes concentraciones de óxido de aluminio (Al 2 O 3 ). Los compósitos fueron caracterizados por espectroscopía infrarroja (IR), espectroscopía Raman, difracción de rayos X (XRD) y microscopía de fuerza atómica (AFM). Las combinaciones del electrolito sólido PEO 10 CF 3 COONa con diferentes concentraciones de Al 2 O 3 , mostraron cambios en la intensidad de los picos de XRD, así como cambios en la intensidad y posición de algunos picos de IR y Raman. El decrecimiento de los picos del PEO en XRD, cuando este fue combinado con la sal, reveló que la cristalinidad del polímero se redujo, siendo más baja cuando se le adicionó alúmina. Se observó un incremento en la raíz cuadrática media de la rugosidad (R RMS ) obtenida por microscopia de fuerza atómica cuando se adicionó Al 2 O 3. Este incremento está en concordancia con la reducción de la cristalinidad observada con estudios de XRD. Los cambios en la estructura del PEO mostrados en las líneas de absorción de IR y Raman, debidos a la adición de CF 3 COONa y Al 2 O 3 , fueron atribuidos a interacciones entre el electrolito y el relleno Al 2 O 3 .

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Section: Introductionmentioning

confidence: 99%

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Delgado-Rosero

Jurado-Meneses

Meléndez‐Lira

2017

Rev. Fac. Ing. Univ. Antioquia

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“…This variety of rheological behaviors makes silica particle a very interesting filler from the point of view of a wide range of applications. For example, gels of fumed silica in mineral or silicone oils are used as filling compounds in fiber-optic cables, while in polyethylene glycols are being considered for application as polymer electrolytes in rechargeable lithium batteries (Jáuregui Beloqui & Martin Martinez, 1999;Dolz et al, 2000;Walls et al, 2000;Li et al, 2002;Fischer et al, 2006;Yziquel et al, 1999;Ouyang et al, 2006). It has been already reported elsewhere (Galindo-Rosales & Rubio-Hernández, 2007; that suspensions of Aerosil R R805 and Aerosil R 200 in Polypropylene Glycol (PPG) with a molecular weight of 400 g/mol exhibit completely different rheological behaviour.…”

Section: Experimental Data Setmentioning

confidence: 99%

Numerical Simulation in Steady Flow of Non-Newtonian Fluids in Pipes with Circular Cross-Section

Galindo-Rosales¹,

Rubio-Hernández²

2010

Numerical Simulations - Examples and Applications in Computational Fluid Dynamics

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“…Battery system modeling of gel and dry polymer systems [4][5][6][7] shows that much of the performance loss occurs in the composite structures where the ion transport properties can be quite different from the bulk due to the influence of the surfaces. The recent intense interest in the use of ceramic nanoparticle filler material to alter the transport properties of lithium salts in polymer electrolytes [8][9][10][11][12][13][14][15][16][17][18][19] has generated a considerable body of useful data in this respect that can be used to understand the behavior of composite electrodes as well as membranes.…”

Section: Introductionmentioning

confidence: 99%

Interfacial behavior of polymer electrolytes

Kerr¹,

Han²,

Liu³

et al. 2004

Electrochimica Acta

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Abstract.Evidence is presented concerning the effect of surfaces on the segmental motion of PEO-based polymer electrolytes in lithium batteries. For dry systems with no moisture the effect of surfaces of nano-particle fillers is to inhibit the segmental motion and to reduce the lithium ion transport. These effects also occur at the surfaces in composite electrodes that contain considerable quantities of carbon black nano-particles for electronic connection. The problem of reduced polymer mobility is compounded by the generation of salt concentration gradients within the composite electrode. Highly concentrated polymer electrolytes have reduced transport properties due to the increased ionic cross-linking. Combined with the interfacial interactions this leads to the generation of low mobility electrolyte layers within the electrode and to loss of capacity and power capability. It is shown that even with planar lithium metal electrodes the concentration gradients can significantly impact the interfacial impedance. The interfacial impedance of lithium/PEO-LiTFSI cells varies depending upon the time elapsed since current was turned off after polarization. The behavior is consistent with relaxation of the salt concentration gradients and indicates that a portion of the interfacial impedance usually attributed to the SEI layer is due to concentrated salt solutions next to the electrode surfaces that are very resistive. These resistive layers may undergo actual phase changes in a non-uniform manner and the possible role of the reduced mobility polymer layers in dendrite initiation and growth is also explored. It is concluded that PEO and ethylene oxide-based polymers are less than ideal with respect to this interfacial behavior.Introduction.

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Fumed silica-based composite polymer electrolytes: synthesis, rheology, and electrochemistry

Cited by 155 publications

References 16 publications

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Structural and vibrational studies on composites polymer electrolytes (PEO)10CF3COONa + x wt.% Al2O3

Numerical Simulation in Steady Flow of Non-Newtonian Fluids in Pipes with Circular Cross-Section

Interfacial behavior of polymer electrolytes

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