Cited by 49Fuel Cells and Related MaterialsBlock Copolymer Self-AssemblyAdvanced Battery Materials and Technologies

Structure–conductivity relationships of block copolymer membranes based on hydrated protic polymerized ionic liquids: Effect of domain spacing

Sanoja, Gabriel E., Popere, Bhooshan C., Beckingham, Bryan S., Evans, Christopher M., Lynd, Nathaniel A., Segalman, Rachel A.·2016·Macromolecules

Abstract

Elucidating the relationship between chemical structure, morphology, and ionic conductivity is essential for designing novel high-performance materials for electrochemical applications. In this work, the effect of lamellar domain spacing ( d ) on ionic conductivity (σ) is investigated for a model system of hydrated diblock copolymer based on a protic polymerized ionic liquid. We present a strategy that allows for the synthesis of a well-defined series of narrowly dispersed PS- b -PIL with constant volume fraction of ionic liquid moieties ( f IL ≈ 0.39) and with two types of mobile charge carriers: trifluoroacetate anions and protons. These materials self-assemble into ordered lamellar morphologies with variable domain spacing (ca. 20–70 nm) as demonstrated by small-angle X-ray scattering. PS- b- PIL membranes exhibit ionic conductivities above 10 –4 S/cm at room temperature, which are independent of domain spacing consistent with their nearly identical water content. The conductivity scaling relationship demonstrated in this paper suggests that a mechanically robust membrane can be designed without compromising its ability to transport ions. In addition, PIL-based membranes exhibit low water uptake (λ ≈ 10) in comparison with many proton-conducting systems reported elsewhere. The low water content of the materials described herein makes them promising candidates for electrochemical devices operating in aqueous electrolytes at low current densities where moderate ion conduction and low product crossover are required.

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Crossref · 10.1021/acs.macromol.5b02614

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  • Segalman et al. prepared a series of ionic conducting BCPs to investigate the relationship between ionic conductivity and domain spacing.

    “Segalman et al. prepared a series of ionic conducting BCPs to investigate the relationship between ionic conductivity and domain spacing [73].”

    From Block Copolymers: Synthesis, Self-Assembly, and Applications (2017) · cites this paper as [73]

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Authors
Sanoja, G. E., Popere, B. C., Beckingham, B. S., Evans, C. M., Lynd, N. A., & Segalman, R. A.
Affiliations
Lawrence Berkeley National Laboratory (US)
Corresponding author
  • Lynd, Nathaniel A.
  • Segalman, Rachel A.
Venue
Macromolecules
Published
2016-03-04
Volume
49
Issue
6
Pages
2216-2223
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2291081682
Cited by
49
References
61
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 8 · 2020: 4 · 2019: 7 · 2018: 4 · 2017: 9 · 2016: 4
FWCI
3.69
Type
journal article
Language
en
Open access
closed
Locations
Macromolecules (publishedVersion)
Funders
  • Basic Energy Sciences (DE-AC02-05CH11231, DE-SC0004993)
  • Air Force Office of Scientific Research (FA9550-12-1)
  • California Energy Commission (500-11-23)
  • Division of Materials Research (DMR 1121053)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Materials Science › Materials Chemistry › Block Copolymer Self-Assembly
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
Keywords
ionic conductivity, block copolymer membranes, poly(ionic liquids), protic ionic liquids, self-assembly, proton conduction, trifluoroacetate anion, water absorption, structure-conductivity relationship, aqueous electrolyte solutions, electrochemical devices

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