Investigation on LiNaSO4-Al2O3 ceramics as electrolytes for H2/O2 fuel cells

Shanwen Tao; Bin Zhu; Dingkun Peng; Guangyao Meng

doi:10.1016/S0025-5408(99)00161-0

Investigation on LiNaSO₄-Al₂O₃ ceramics as electrolytes for H₂/O₂ fuel cells

Shanwen Tao
, Bin Zhu
, Dingkun Peng
, Guangyao Meng

University of Science and Technology of China

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

7 Scopus citations

Abstract

LiNaSO₄-Al₂O₃ ceramic composites were prepared for use as electrolytes in H₂/O₂ fuel cells. TG/DTA, XRD, and FT-IR studies on the structure and phase composition of the materials indicated no obvious chemical reaction between LiNaSO₄ and α-Al₂O₃ during heat treatment up to 800°C. The concentration of surface defects increased because of addition of α-Al₂O₃, which enhanced the ionic conduction of the materials. When a proper amount of α-Al₂O₃ was added, the conductivity of LiNaSO₄-Al₂O₃ reached 10^-2 S/cm below the phase transition temperature (515°C) of LiNaSO₄ and 10^-1 S/cm above it. H₂/O₂ fuel cells using LiNaSO₄-Al₂O₃ as an electrolyte showed an open circuit voltage of 1.3 V and a current density of 280 mA/cm² at 0.35 V terminal voltage. However, the rapid degradation of the cell performance implies that the materials may be unstable in the operational condition of fuel cells.

Original language	English
Pages (from-to)	1651-1659
Number of pages	9
Journal	Materials Research Bulletin
Volume	34
Issue number	10-11
DOIs	https://doi.org/10.1016/S0025-5408(99)00161-0
State	Published - 1999
Externally published	Yes

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10.1016/S0025-5408(99)00161-0

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title = "Investigation on LiNaSO4-Al2O3 ceramics as electrolytes for H2/O2 fuel cells",

abstract = "LiNaSO4-Al2O3 ceramic composites were prepared for use as electrolytes in H2/O2 fuel cells. TG/DTA, XRD, and FT-IR studies on the structure and phase composition of the materials indicated no obvious chemical reaction between LiNaSO4 and α-Al2O3 during heat treatment up to 800°C. The concentration of surface defects increased because of addition of α-Al2O3, which enhanced the ionic conduction of the materials. When a proper amount of α-Al2O3 was added, the conductivity of LiNaSO4-Al2O3 reached 10-2 S/cm below the phase transition temperature (515°C) of LiNaSO4 and 10-1 S/cm above it. H2/O2 fuel cells using LiNaSO4-Al2O3 as an electrolyte showed an open circuit voltage of 1.3 V and a current density of 280 mA/cm2 at 0.35 V terminal voltage. However, the rapid degradation of the cell performance implies that the materials may be unstable in the operational condition of fuel cells.",

author = "Shanwen Tao and Bin Zhu and Dingkun Peng and Guangyao Meng",

year = "1999",

doi = "10.1016/S0025-5408(99)00161-0",

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volume = "34",

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journal = "Materials Research Bulletin",

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TY - JOUR

T1 - Investigation on LiNaSO4-Al2O3 ceramics as electrolytes for H2/O2 fuel cells

AU - Tao, Shanwen

AU - Zhu, Bin

AU - Peng, Dingkun

AU - Meng, Guangyao

PY - 1999

Y1 - 1999

N2 - LiNaSO4-Al2O3 ceramic composites were prepared for use as electrolytes in H2/O2 fuel cells. TG/DTA, XRD, and FT-IR studies on the structure and phase composition of the materials indicated no obvious chemical reaction between LiNaSO4 and α-Al2O3 during heat treatment up to 800°C. The concentration of surface defects increased because of addition of α-Al2O3, which enhanced the ionic conduction of the materials. When a proper amount of α-Al2O3 was added, the conductivity of LiNaSO4-Al2O3 reached 10-2 S/cm below the phase transition temperature (515°C) of LiNaSO4 and 10-1 S/cm above it. H2/O2 fuel cells using LiNaSO4-Al2O3 as an electrolyte showed an open circuit voltage of 1.3 V and a current density of 280 mA/cm2 at 0.35 V terminal voltage. However, the rapid degradation of the cell performance implies that the materials may be unstable in the operational condition of fuel cells.

AB - LiNaSO4-Al2O3 ceramic composites were prepared for use as electrolytes in H2/O2 fuel cells. TG/DTA, XRD, and FT-IR studies on the structure and phase composition of the materials indicated no obvious chemical reaction between LiNaSO4 and α-Al2O3 during heat treatment up to 800°C. The concentration of surface defects increased because of addition of α-Al2O3, which enhanced the ionic conduction of the materials. When a proper amount of α-Al2O3 was added, the conductivity of LiNaSO4-Al2O3 reached 10-2 S/cm below the phase transition temperature (515°C) of LiNaSO4 and 10-1 S/cm above it. H2/O2 fuel cells using LiNaSO4-Al2O3 as an electrolyte showed an open circuit voltage of 1.3 V and a current density of 280 mA/cm2 at 0.35 V terminal voltage. However, the rapid degradation of the cell performance implies that the materials may be unstable in the operational condition of fuel cells.

UR - https://www.scopus.com/pages/publications/0342756898

U2 - 10.1016/S0025-5408(99)00161-0

DO - 10.1016/S0025-5408(99)00161-0

M3 - 文章

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SN - 0025-5408

VL - 34

SP - 1651

EP - 1659

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 10-11

ER -

Investigation on LiNaSO₄-Al₂O₃ ceramics as electrolytes for H₂/O₂ fuel cells

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