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Demonstrating the potential of yttrium-doped barium zirconate electrolyte for high-performance fuel cells.

Abstract：

:In reducing the high operating temperatures (≥800 °C) of solid-oxide fuel cells, use of protonic ceramics as an alternative electrolyte material is attractive due to their high conductivity and low activation energy in a low-temperature regime (≤600 °C). Among many protonic ceramics, yttrium-doped barium zirconate has attracted attention due to its excellent chemical stability, which is the main issue in protonic-ceramic fuel cells. However, poor sinterability of yttrium-doped barium zirconate discourages its fabrication as a thin-film electrolyte and integration on porous anode supports, both of which are essential to achieve high performance. Here we fabricate a protonic-ceramic fuel cell using a thin-film-deposited yttrium-doped barium zirconate electrolyte with no impeding grain boundaries owing to the columnar structure tightly integrated with nanogranular cathode and nanoporous anode supports, which to the best of our knowledge exhibits a record high-power output of up to an order of magnitude higher than those of other reported barium zirconate-based fuel cells.

journal_name

Nat Commun

journal_title

Nature communications

authors

Bae K,Jang DY,Choi HJ,Kim D,Hong J,Kim BK,Lee JH,Son JW,Shim JH

doi

10.1038/ncomms14553

subject

Has Abstract

pub_date

2017-02-23 00:00:00

pages

14553

issn

2041-1723

pii

ncomms14553

journal_volume

8

pub_type

杂志文章

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