Gel Electrolytes of Covalent Network Polybenzimidazole and Phosphoric Acid by Direct Casting

Andreas Kirkebæk, David Aili, Dirk Henkensmeier, Jens Oluf Jensen, Qingfeng Li

Research output: Contribution to journalJournal articleResearchpeer-review

124 Downloads (Pure)

Abstract

Polybenzimidazole membranes imbibed with phosphoric acid can support high proton conductivity at 120–200 °C, and have therefore emerged as the state-of-the-art electrolytes for fuel cells operating in this temperature range. This work presents a novel and operationally simple methodology for preparing mechanically robust covalent network polybenzimidazole membranes containing up to 95 wt% phosphoric acid. Diamino-terminal pre-polymers of different chain lengths are first prepared, followed by addition of a trifunctional carboxylic acid. The crude solutions are cast and subsequently heat treated at up to 230 °C, yielding free-standing membranes of networked polybenzimidazole with high proton conductivity at up to 180 °C and encouraging fuel cell performance
Original languageEnglish
Article number1700347
JournalMacromolecular Materials and Engineering
Volume302
Issue number12
Number of pages7
ISSN1438-7492
DOIs
Publication statusPublished - 2017

Cite this

@article{0852ed86fed84a1092d7c93ce173aad5,
title = "Gel Electrolytes of Covalent Network Polybenzimidazole and Phosphoric Acid by Direct Casting",
abstract = "Polybenzimidazole membranes imbibed with phosphoric acid can support high proton conductivity at 120–200 °C, and have therefore emerged as the state-of-the-art electrolytes for fuel cells operating in this temperature range. This work presents a novel and operationally simple methodology for preparing mechanically robust covalent network polybenzimidazole membranes containing up to 95 wt{\%} phosphoric acid. Diamino-terminal pre-polymers of different chain lengths are first prepared, followed by addition of a trifunctional carboxylic acid. The crude solutions are cast and subsequently heat treated at up to 230 °C, yielding free-standing membranes of networked polybenzimidazole with high proton conductivity at up to 180 °C and encouraging fuel cell performance",
author = "Andreas Kirkeb{\ae}k and David Aili and Dirk Henkensmeier and Jensen, {Jens Oluf} and Qingfeng Li",
year = "2017",
doi = "10.1002/mame.201700347",
language = "English",
volume = "302",
journal = "Macromolecular Materials & Engineering",
issn = "1438-7492",
publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
number = "12",

}

Gel Electrolytes of Covalent Network Polybenzimidazole and Phosphoric Acid by Direct Casting. / Kirkebæk, Andreas; Aili, David; Henkensmeier, Dirk; Jensen, Jens Oluf; Li, Qingfeng.

In: Macromolecular Materials and Engineering, Vol. 302, No. 12, 1700347, 2017.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Gel Electrolytes of Covalent Network Polybenzimidazole and Phosphoric Acid by Direct Casting

AU - Kirkebæk, Andreas

AU - Aili, David

AU - Henkensmeier, Dirk

AU - Jensen, Jens Oluf

AU - Li, Qingfeng

PY - 2017

Y1 - 2017

N2 - Polybenzimidazole membranes imbibed with phosphoric acid can support high proton conductivity at 120–200 °C, and have therefore emerged as the state-of-the-art electrolytes for fuel cells operating in this temperature range. This work presents a novel and operationally simple methodology for preparing mechanically robust covalent network polybenzimidazole membranes containing up to 95 wt% phosphoric acid. Diamino-terminal pre-polymers of different chain lengths are first prepared, followed by addition of a trifunctional carboxylic acid. The crude solutions are cast and subsequently heat treated at up to 230 °C, yielding free-standing membranes of networked polybenzimidazole with high proton conductivity at up to 180 °C and encouraging fuel cell performance

AB - Polybenzimidazole membranes imbibed with phosphoric acid can support high proton conductivity at 120–200 °C, and have therefore emerged as the state-of-the-art electrolytes for fuel cells operating in this temperature range. This work presents a novel and operationally simple methodology for preparing mechanically robust covalent network polybenzimidazole membranes containing up to 95 wt% phosphoric acid. Diamino-terminal pre-polymers of different chain lengths are first prepared, followed by addition of a trifunctional carboxylic acid. The crude solutions are cast and subsequently heat treated at up to 230 °C, yielding free-standing membranes of networked polybenzimidazole with high proton conductivity at up to 180 °C and encouraging fuel cell performance

U2 - 10.1002/mame.201700347

DO - 10.1002/mame.201700347

M3 - Journal article

VL - 302

JO - Macromolecular Materials & Engineering

JF - Macromolecular Materials & Engineering

SN - 1438-7492

IS - 12

M1 - 1700347

ER -