Dense diffusion barrier limiting current oxygen sensors

Garzón, Fernando H.; Raistrick, I. D.; Brosha, Eric L.; Houlton, R. J.; Chung, B W

doi:10.1016/s0925-4005(98)00169-5

Cited by 77 publications

(23 citation statements)

References 11 publications

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“…4a and b, respectively. In general, it is not easy to obtain the limiting current density from such polarization curves [54,55] although oxygen diffusion should be an important issue at a relatively high current density (e.g., À40 mA cm À2 ). Note in Fig.…”

Section: The Oxygen Reduction Reactionmentioning

confidence: 99%

Synthesis and characterization of carbon black/manganese oxide air cathodes for zinc–air batteries: Effects of the crystalline structure of manganese oxides

Noda

et al. 2015

Journal of Power Sources

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Section: The Oxygen Reduction Reactionmentioning

confidence: 99%

Synthesis and characterization of carbon black/manganese oxide air cathodes for zinc–air batteries: Effects of the crystalline structure of manganese oxides

Noda

et al. 2015

Journal of Power Sources

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“…The plugging and deformation often appear in the first two types of diffusion barrier, which limit their practical application. The shortcoming associated with pore-based diffusion barriers can be overcome by using a mixed oxide-ion/electron conducting material as a dense diffusion barrier (Ref [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A Limiting Current Oxygen Sensor Based on LSGM as a Solid Electrolyte and LSGMN (N = Fe, Co) as a Dense Diffusion Barrier

Liu

Gao

et al. 2016

J. of Materi Eng and Perform

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The La 0.8 Sr 0.2 (Ga 12x Co x ) 0.8 Mg 0.2 O 32d (LSGMC x = 0.05, 0.1, 0.15, 0.2, 0.25) and La 0.8 Sr 0.2 (Ga 12x Fe x ) 0.8 Mg 0.2 O 32d (LSGMF x = 0.1, 0.2, 0.3) samples were prepared by solid-state reaction. The structure, conductivity, thermal expansion behavior, and chemical compatibility were studied by XRD, dilatometry, and four-terminal method. A limiting current oxygen sensor was prepared with La 0.8 Sr 0.2 Ga 0.83 Mg 0.17 O 2.815 as a solid electrolyte and La 0.8 Sr 0.2 (Ga 0.75 Co 0.25 ) 0.8 Mg 0.2 O 32d as a dense diffusion barrier. The oxygen-sensitive characteristic was measured at different oxygen concentrations. The results show that the phase structure of samples is cubic, except La 0.8 Sr 0.2 (Ga 0.75 Co 0.25 ) 0.8 Mg 0.2 O 32d , which has a hexagonal structure. The change in activation energy for electrical conductivity and the increase in thermal expansion coefficient are confirmed to correlate with an increasing concentration of oxygen vacancies. The limiting current oxygen sensor exhibits a good limiting current platform and the limiting current depends linearly on the oxygen concentration: I L (mA) = 12.8519 + 2.2667 x O2 (mol%, 0 < x O2 < 3.31) at 750°C, I L (mA) = 14.3222 + 3.5180 x O2 (mol%, 0 < x O2 < 4.16) at 800°C, and I L (mA) = 15.2872 + 5.0269 x O2 (mol%, 0 < x O2 < 4.12) at 850°C. The sensor has the best sensitivity at 850°C. As the oxygen concentration increases, the interface resistance of the sensor decreases at 850°C.

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“…Much work has been done on the dense diffusion barrier limiting current oxygen sensor . Garzon et al reported the preparation of a sensor based on ZrO 2 stabilized with Y 2 O 3 (YSZ) as solid electrolyte by magnetron sputtering technique. This sensor had a narrow detection range of oxygen since the dense diffusion barrier was very thin and its oxide‐ion conductivity was high.…”

Section: Introductionmentioning

confidence: 99%

A novel method for preparing dense diffusion barrier limiting current oxygen sensor

Liu

Jin

et al. 2017

J Am Ceram Soc

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A novel method for preparation of a dense diffusion barrier limiting current oxygen sensor is presented. The dense thin-layer with the nominal composition Sr-, Mg-and Fe-doped lanthanum gallate (LSGMF) was prepared over La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-d (LSGM) electrolyte by a thermal diffusion method. The crystal structure, morphology, elemental distribution, conductivity, and sensing performance of the prepared sample were investigated. X-ray diffraction (XRD) analysis shows a highly crystalline perovskite. SEM-EDS analysis shows that the dense thin-layer with about 40 lm thickness is well attached to the solid electrolyte. Electrical conductivity measurement shows that the dense thin-layer has high conductivity of 8.73 SÁcm À1 at 800°C. The oxygen sensor exhibits good sensing performance. The variations of the limiting current (I L ) vs oxygen content (x(O 2 )) can be obtained as follows:¼ 96:65xðOÞ 2 ðmolÞ% þ 28:62 K E Y W O R D S dense diffusion barrier, limiting current oxygen sensor, perovskite, solid electrolyte

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Dense diffusion barrier limiting current oxygen sensors

Cited by 77 publications

References 11 publications

Synthesis and characterization of carbon black/manganese oxide air cathodes for zinc–air batteries: Effects of the crystalline structure of manganese oxides

Synthesis and characterization of carbon black/manganese oxide air cathodes for zinc–air batteries: Effects of the crystalline structure of manganese oxides

A Limiting Current Oxygen Sensor Based on LSGM as a Solid Electrolyte and LSGMN (N = Fe, Co) as a Dense Diffusion Barrier

A novel method for preparing dense diffusion barrier limiting current oxygen sensor

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