Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells

T. Ishiyama; S. Suzuki; J. Nishii; T. Yamashita; H. Kawazoe; T. Omata

doi:10.1016/j.ssi.2013.10.055

Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells

T. Ishiyama, S. Suzuki, J. Nishii, T. Yamashita, H. Kawazoe, T. Omata

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

High concentrations of proton carriers (5.0 × 10²¹ cm ^{- 3}) were injected into tungsten phosphate glass (8WO ₃-35NaO_1/2-8NbO_5/2-5LaO_3/2-44PO _5/2) by electrochemical substitution of sodium ions with protons at 345 °C. The electromotive force of a hydrogen concentration cell that used the substituted glass as a solid electrolyte indicated a mixed conduction of protons and electrons in the glass with a mean proton transport number of 0.8 at 300 °C. The partial conductivity of the protons was 8.0 × 10 ^{- 4} Scm^{- 1}. The fuel cell generated electricity at a maximum power density of 1.3 mWcm^{- 2}, even though its open circuit voltage was only 0.77 V because of the electronic contribution to the conductivity. Methods to increase the proton conductivity for improving fuel cell performance are discussed.

Original language	English
Pages (from-to)	856-859
Number of pages	4
Journal	Solid State Ionics
Volume	262
DOIs	https://doi.org/10.1016/j.ssi.2013.10.055
Publication status	Published - 2014 Sept 1
Externally published	Yes

Keywords

Electrochemical substitution
Intermediate temperature fuel cells
Proton conductor
Tungsten phosphate glass

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/j.ssi.2013.10.055

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title = "Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells",

abstract = "High concentrations of proton carriers (5.0 × 1021 cm - 3) were injected into tungsten phosphate glass (8WO 3-35NaO1/2-8NbO5/2-5LaO3/2-44PO 5/2) by electrochemical substitution of sodium ions with protons at 345 °C. The electromotive force of a hydrogen concentration cell that used the substituted glass as a solid electrolyte indicated a mixed conduction of protons and electrons in the glass with a mean proton transport number of 0.8 at 300 °C. The partial conductivity of the protons was 8.0 × 10 - 4 Scm- 1. The fuel cell generated electricity at a maximum power density of 1.3 mWcm- 2, even though its open circuit voltage was only 0.77 V because of the electronic contribution to the conductivity. Methods to increase the proton conductivity for improving fuel cell performance are discussed.",

keywords = "Electrochemical substitution, Intermediate temperature fuel cells, Proton conductor, Tungsten phosphate glass",

author = "T. Ishiyama and S. Suzuki and J. Nishii and T. Yamashita and H. Kawazoe and T. Omata",

note = "Funding Information: This work was supported in part by the Advanced Low Carbon Technology Research and Developing Program of Japan Science and Technology Agency (JST-ALCA). Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "2014",

month = sep,

day = "1",

doi = "10.1016/j.ssi.2013.10.055",

language = "English",

volume = "262",

pages = "856--859",

journal = "Solid State Ionics",

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T1 - Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells

AU - Ishiyama, T.

AU - Suzuki, S.

AU - Nishii, J.

AU - Yamashita, T.

AU - Kawazoe, H.

AU - Omata, T.

N1 - Funding Information: This work was supported in part by the Advanced Low Carbon Technology Research and Developing Program of Japan Science and Technology Agency (JST-ALCA). Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 2014/9/1

Y1 - 2014/9/1

N2 - High concentrations of proton carriers (5.0 × 1021 cm - 3) were injected into tungsten phosphate glass (8WO 3-35NaO1/2-8NbO5/2-5LaO3/2-44PO 5/2) by electrochemical substitution of sodium ions with protons at 345 °C. The electromotive force of a hydrogen concentration cell that used the substituted glass as a solid electrolyte indicated a mixed conduction of protons and electrons in the glass with a mean proton transport number of 0.8 at 300 °C. The partial conductivity of the protons was 8.0 × 10 - 4 Scm- 1. The fuel cell generated electricity at a maximum power density of 1.3 mWcm- 2, even though its open circuit voltage was only 0.77 V because of the electronic contribution to the conductivity. Methods to increase the proton conductivity for improving fuel cell performance are discussed.

AB - High concentrations of proton carriers (5.0 × 1021 cm - 3) were injected into tungsten phosphate glass (8WO 3-35NaO1/2-8NbO5/2-5LaO3/2-44PO 5/2) by electrochemical substitution of sodium ions with protons at 345 °C. The electromotive force of a hydrogen concentration cell that used the substituted glass as a solid electrolyte indicated a mixed conduction of protons and electrons in the glass with a mean proton transport number of 0.8 at 300 °C. The partial conductivity of the protons was 8.0 × 10 - 4 Scm- 1. The fuel cell generated electricity at a maximum power density of 1.3 mWcm- 2, even though its open circuit voltage was only 0.77 V because of the electronic contribution to the conductivity. Methods to increase the proton conductivity for improving fuel cell performance are discussed.

KW - Electrochemical substitution

KW - Intermediate temperature fuel cells

KW - Proton conductor

KW - Tungsten phosphate glass

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DO - 10.1016/j.ssi.2013.10.055

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SN - 0167-2738

VL - 262

SP - 856

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JO - Solid State Ionics

JF - Solid State Ionics

ER -

Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells

Abstract

Keywords

ASJC Scopus subject areas

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