15–16 Sept 2011
Paul Scherrer Institut, Villigen, Switzerland
Europe/Zurich timezone

Interaction of water with Ceramic Proton Conductors

16 Sept 2011, 13:17
2m
WSLA - Foyer (Paul Scherrer Institut, Villigen, Switzerland)

WSLA - Foyer

Paul Scherrer Institut, Villigen, Switzerland

Board: 91
Poster Poster Session II (Friday) Poster session II and lunch

Speaker

Qianli Chen (Empa)

Description

Proton conductors are promising solid electrolyte materials for ceramic fuel cells operating at intermediate temperature. Protons are introduced in the form of water to those oxygen defected sites. We found by electrochemical impedance spectroscopy at high pressure that compressing the lattice decreases proton conductivity, which indicates that the protons need "space" to move freely in the lattice. We are probing the proton diffusion in the atomic scale by quasielastic neutron scattering under high pressure. Also, our recent results in neutron scattering from SINQ reveal that the onset temperature of lateral proton diffusion coincides with its thermal lattice expansion, which exhibits a contraction for protonated BaZr0.9Y0.1O2.95 at T = 648 K, suggesting a correlation of toughening of the lattice and proton conductivity.

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Poster session I

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poster

Primary author

Qianli Chen (Empa)

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