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Issue 44, 2013
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Mesoporous lanthanum phosphate nanostructures containing H3PO4 as superior electrolyte for PEM fuel cells

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Abstract

Mesoporous lanthanum phosphate nanostructures, involving diverse shaped LaPO4 nanostructures synthesized in EG solution and dandelion-like LaPO4·0.5H2O nanospheres obtained in aqueous solution, have different surface areas and pore volumes for various nanostructures. Lanthanum phosphate containing H3PO4 were prepared by impregnating as-obtained lanthanum phosphate nanostructures in phosphoric acid solution, which showed different proton conductivities for diverse morphologies of lanthanum phosphate and different contents of H3PO4. Among them, sphere-shaped LaPO4 nanostructures containing 5 wt% H3PO4 (s-LaPO4–5 wt% PA) showed promising proton conductivity of around 10−2 S cm−1 at 120–180 °C and 20% RH. Moreover, the pellet pressed by s-LaPO4–5 wt% PA powder could act as the electrolyte of a proton exchange membrane fuel cell (PEMFC) and exhibit higher performance (maximum power density of 84.0 mW cm−2) than Nafion 115 membrane at 180 °C and under 20% RH. In addition, the stability of the MEA electrolyte and the duration of a single cell based on s-LaPO4–5 wt% PA were also tested.

Graphical abstract: Mesoporous lanthanum phosphate nanostructures containing H3PO4 as superior electrolyte for PEM fuel cells

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Publication details

The article was received on 28 Apr 2013, accepted on 12 Sep 2013 and first published on 16 Sep 2013


Article type: Paper
DOI: 10.1039/C3RA42094A
Citation: RSC Adv., 2013,3, 21928-21935
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    Mesoporous lanthanum phosphate nanostructures containing H3PO4 as superior electrolyte for PEM fuel cells

    Z. Chai, Q. Suo, H. Wang and X. Wang, RSC Adv., 2013, 3, 21928
    DOI: 10.1039/C3RA42094A

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