Ionic conduction of lithium and magnesium salts within laminar arrays in a smectic liquid-crystal polymer electrolyte

Dias, Felix B.; Batty, S.V.; Ungar, Goran; Voss, Jonathan P.; Wright, Peter V.

doi:10.1039/ft9969202599

Cited by 52 publications

(28 citation statements)

References 5 publications

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“…17 The weight average molecular weight found by gel permeation chromatography (GPC) of the polymer (polystyrene calibration) was about 300 000. Octadecane, cetyl alcohol and were LiClO 4 supplied by Aldrich.…”

Section: Methodsmentioning

confidence: 99%

Supramolecular order in new polymer electrolytes

et al. 1998

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Section: Methodsmentioning

confidence: 99%

Supramolecular order in new polymer electrolytes

et al. 1998

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“…Polymer I (C1605) was prepared as described previously [4,5] Optical microscopy was carried out using an Olympus BX50 microscope fitted with a 'Coolsnap' digital camera. …”

Section: Methodsmentioning

confidence: 99%

“…In (II) the units -A-previously reported were either -CH 2-(IIC1) or -CH2C(=CH2)CH 2-(IID4). Previous work [4][5][6][7][8] on the 2-component systems I : LiX (Type A) or the 3-component systems incorporating C~6-C~s n-alkane or alkyls (Type B) has shown that the side chains of mutually inverted molecules of I interdigitate between polyether helices into which Li § are encapsulated, one per repeat unit or helical turn (Fig. 1).…”

Section: Introductionmentioning

confidence: 98%

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Polymer compatibility, phase separation and high ambient conductivity in low — dimensional polymer electrolyte blends with lithium salts

Chia

Zheng

Liu

et al. 2002

Ionics

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Abstract. AC and DC conductivities of complexes of Li salts with the amphiphilic helical polyether poly [2,5,8,11,14-pentaoxapentadecamethylene(5-hexadecyloxy-1,3-phenylene)] (I) (Type A complexes) and blends of I with copolymers of poly(tetramethylene oxide) oligomer coupled with either -(CH2 -)-(polymer IIC1) or -(CH2)I: -(IIC12) (Type C complexes) are reported. Whereas Type A complexes give reversible AC impedance plots log t~ vs. 1/T plots which are ca. 10 -7 S cm -1 at ambient, the Type C blends rise to ca. 10 -3 S cm -1 at 100 ~ and on cooling to ambient maintain this high level. In Type C systems with IIC12 this transformation is stable and permanent. Optical microscopy reveals phase separation of extensive well-organised lamellae of the Type A phase from the Type C blend following heating. Polymer U resides in thin layers in the interlamellar spaces serving to transfer ions between them. DC data at ambient temperatures for Li I I : II : Li salt I Li cells indicate conductivities 10 -3 to 10 -2 S cm -1 over extended periods (24 hours).

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“…For example, lowdimensional ion-active materials have been developed [6][7][8]. However, no molecular orientation was achieved and anisotropic ionic conductivities could not be measured before we recently prepared lowdimensional ion-conductive materials based on poly(ethylene oxide)s (PEOs) [3,[9][10][11][12] and ionic liquids [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Two Dimensionally Ion-Conductive Liquid Crystals of Cholesterol/Tetra(Ethylene Oxide) Block Molecules

Kishimoto

Sagara

Kato

et al. 2005

Molecular Crystals and Liquid Crystals

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Two-dimensionally ion-conductive liquid crystals have been simply obtained by self-assembly of a cholesterol=tetra(ethylene oxide) block molecule and lithium triflate. Nanophase-segregation between cholesterol and tetra(ethylene oxide) blocks leads to the formation of a smectic A liquid crystalline phase in a wide range of temperature. A homeotropically aligned lithium salt complex in the smectic A phase shows two-dimensional ionic conductivity. The ionic conductivities parallel to the smectic layers are higher than those perpendicular to the layers. The maximum value of the anisotropy in the ionic conductivity is about 2.4 Â 10 3 at 30 C.

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Ionic conduction of lithium and magnesium salts within laminar arrays in a smectic liquid-crystal polymer electrolyte

Cited by 52 publications

References 5 publications

Supramolecular order in new polymer electrolytes

Supramolecular order in new polymer electrolytes

Polymer compatibility, phase separation and high ambient conductivity in low — dimensional polymer electrolyte blends with lithium salts

Two Dimensionally Ion-Conductive Liquid Crystals of Cholesterol/Tetra(Ethylene Oxide) Block Molecules

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