Issue 20, 2020

Coordination polymer glass from a protic ionic liquid: proton conductivity and mechanical properties as an electrolyte

Abstract

High proton conducting electrolytes with mechanical moldability are a key material for energy devices. We propose an approach for creating a coordination polymer (CP) glass from a protic ionic liquid for a solid-state anhydrous proton conductor. A protic ionic liquid (dema)(H2PO4), with components which also act as bridging ligands, was applied to construct a CP glass (dema)0.35[Zn(H2PO4)2.35(H3PO4)0.65]. The structural analysis revealed that large Zn–H2PO4/H3PO4 coordination networks formed in the CP glass. The network formation results in enhancement of the properties of proton conductivity and viscoelasticity. High anhydrous proton conductivity (σ = 13.3 mS cm−1 at 120 °C) and a high transport number of the proton (0.94) were achieved by the coordination networks. A fuel cell with this CP glass membrane exhibits a high open-circuit voltage and power density (0.15 W cm−2) under dry conditions at 120 °C due to the conducting properties and mechanical properties of the CP glass.

Graphical abstract: Coordination polymer glass from a protic ionic liquid: proton conductivity and mechanical properties as an electrolyte

Supplementary files

Article information

Article type
Edge Article
Submitted
25 Marts 2020
Accepted
16 Apr. 2020
First published
17 Apr. 2020
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2020,11, 5175-5181

Coordination polymer glass from a protic ionic liquid: proton conductivity and mechanical properties as an electrolyte

T. Ogawa, K. Takahashi, S. S. Nagarkar, K. Ohara, Y. Hong, Y. Nishiyama and S. Horike, Chem. Sci., 2020, 11, 5175 DOI: 10.1039/D0SC01737J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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