Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes

Mohit Singh; Omolola Odusanya; Gregg M. Wilmes; Hany B. Eitouni; Enrique D. Gomez; Amish J. Patel; Vincent L. Chen; Moon Jeong Park; Panagiota Fragouli; Hermis Iatrou; Nikos Hadjichristidis; David Cookson; Nitash P. Balsara

doi:10.1021/ma0629541

Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes

Mohit Singh, Omolola Odusanya, Gregg M. Wilmes, Hany B. Eitouni, Enrique D. Gomez, Amish J. Patel, Vincent L. Chen, Moon Jeong Park, Panagiota Fragouli, Hermis Iatrou, Nikos Hadjichristidis, David Cookson, Nitash P. Balsara^*

^*Corresponding author for this work

Physical Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

460 Scopus citations

Abstract

The relationship between ionic conductivity, morphology, and Rheological properties of polystyrene-Wocfc-poly(ethylene oxide) copolymers (SEO) doped with a lithium salt, Li[N(SO₂CF₃)₂], is elucidated. We focus on lamellar samples with poly(ethylene oxide) (PEO) volume fractions, φ, ranging from 0.38 to 0.55, and PEO block molecular weights, M _PEO, ranging from 16 to 98 kg/mol. The low-frequency storage modulus (G′) at 90 °C increases with increasing M_PEO from about 4 × 10⁵ to 5 × 10⁷ Pa. Surprisingly, the conductivity of the SEO/salt mixtures with the molar ratio of Li to ethylene oxide moieties of 0.02 σ, also increases with increasing M_PEO, from 6.2 × 10^-5 to 3.6 × 10^-4 S/cm at 90 °C. We compare σ with the conductivity of pure PEO/salt mixtures, σ_PEO. and find that σ/[(φσ_PEO] of our highest molecular weight sample is close to 0.67, the theoretical upper limit for transport through randomly oriented lamellar grains.

Original language	English (US)
Pages (from-to)	4578-4585
Number of pages	8
Journal	Macromolecules
Volume	40
Issue number	13
DOIs	https://doi.org/10.1021/ma0629541
State	Published - Jun 26 2007

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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@article{530288696ac04337b2145f134f8fe642,

title = "Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes",

abstract = "The relationship between ionic conductivity, morphology, and Rheological properties of polystyrene-Wocfc-poly(ethylene oxide) copolymers (SEO) doped with a lithium salt, Li[N(SO2CF3)2], is elucidated. We focus on lamellar samples with poly(ethylene oxide) (PEO) volume fractions, φ, ranging from 0.38 to 0.55, and PEO block molecular weights, M PEO, ranging from 16 to 98 kg/mol. The low-frequency storage modulus (G′) at 90 °C increases with increasing MPEO from about 4 × 105 to 5 × 107 Pa. Surprisingly, the conductivity of the SEO/salt mixtures with the molar ratio of Li to ethylene oxide moieties of 0.02 σ, also increases with increasing MPEO, from 6.2 × 10-5 to 3.6 × 10-4 S/cm at 90 °C. We compare σ with the conductivity of pure PEO/salt mixtures, σPEO. and find that σ/[(φσPEO] of our highest molecular weight sample is close to 0.67, the theoretical upper limit for transport through randomly oriented lamellar grains.",

author = "Mohit Singh and Omolola Odusanya and Wilmes, {Gregg M.} and Eitouni, {Hany B.} and Gomez, {Enrique D.} and Patel, {Amish J.} and Chen, {Vincent L.} and Park, {Moon Jeong} and Panagiota Fragouli and Hermis Iatrou and Nikos Hadjichristidis and David Cookson and Balsara, {Nitash P.}",

year = "2007",

month = jun,

day = "26",

doi = "10.1021/ma0629541",

language = "English (US)",

volume = "40",

pages = "4578--4585",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "13",

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TY - JOUR

T1 - Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes

AU - Singh, Mohit

AU - Odusanya, Omolola

AU - Wilmes, Gregg M.

AU - Eitouni, Hany B.

AU - Gomez, Enrique D.

AU - Patel, Amish J.

AU - Chen, Vincent L.

AU - Park, Moon Jeong

AU - Fragouli, Panagiota

AU - Iatrou, Hermis

AU - Hadjichristidis, Nikos

AU - Cookson, David

AU - Balsara, Nitash P.

PY - 2007/6/26

Y1 - 2007/6/26

N2 - The relationship between ionic conductivity, morphology, and Rheological properties of polystyrene-Wocfc-poly(ethylene oxide) copolymers (SEO) doped with a lithium salt, Li[N(SO2CF3)2], is elucidated. We focus on lamellar samples with poly(ethylene oxide) (PEO) volume fractions, φ, ranging from 0.38 to 0.55, and PEO block molecular weights, M PEO, ranging from 16 to 98 kg/mol. The low-frequency storage modulus (G′) at 90 °C increases with increasing MPEO from about 4 × 105 to 5 × 107 Pa. Surprisingly, the conductivity of the SEO/salt mixtures with the molar ratio of Li to ethylene oxide moieties of 0.02 σ, also increases with increasing MPEO, from 6.2 × 10-5 to 3.6 × 10-4 S/cm at 90 °C. We compare σ with the conductivity of pure PEO/salt mixtures, σPEO. and find that σ/[(φσPEO] of our highest molecular weight sample is close to 0.67, the theoretical upper limit for transport through randomly oriented lamellar grains.

AB - The relationship between ionic conductivity, morphology, and Rheological properties of polystyrene-Wocfc-poly(ethylene oxide) copolymers (SEO) doped with a lithium salt, Li[N(SO2CF3)2], is elucidated. We focus on lamellar samples with poly(ethylene oxide) (PEO) volume fractions, φ, ranging from 0.38 to 0.55, and PEO block molecular weights, M PEO, ranging from 16 to 98 kg/mol. The low-frequency storage modulus (G′) at 90 °C increases with increasing MPEO from about 4 × 105 to 5 × 107 Pa. Surprisingly, the conductivity of the SEO/salt mixtures with the molar ratio of Li to ethylene oxide moieties of 0.02 σ, also increases with increasing MPEO, from 6.2 × 10-5 to 3.6 × 10-4 S/cm at 90 °C. We compare σ with the conductivity of pure PEO/salt mixtures, σPEO. and find that σ/[(φσPEO] of our highest molecular weight sample is close to 0.67, the theoretical upper limit for transport through randomly oriented lamellar grains.

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U2 - 10.1021/ma0629541

DO - 10.1021/ma0629541

M3 - Article

AN - SCOPUS:34547177228

SN - 0024-9297

VL - 40

SP - 4578

EP - 4585

JO - Macromolecules

JF - Macromolecules

IS - 13

ER -

Effect of molecular weight on the mechanical and electrical properties of block copolymer electrolytes

Abstract

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