Effects of rapid process on the conductivity of multiple elements doped ceria-based electrolyte

Chang, Horng‐Yi; Wang, Yaoming; Lin, Chan-Shing; Cheng, Syh-Yuh

doi:10.1016/j.jpowsour.2010.10.035

Cited by 18 publications

(7 citation statements)

References 40 publications

(58 reference statements)

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“…Polymers 2021, 13, x FOR PEER REVIEW 11 of 23 or 3.0 mol% LSBC shown in Figure 8 maintains appropriate high electronic conductivity and electrocatalytic activity simultaneously. This situation is the electron transfer at the TPB of the electronic core and ionic shell [24,47,55]. Ce 3+ was possibly formed at the anode in a reduction atmosphere at the higher temperature, 700 °C , in Figure 8 and enhanced the electronic conductivity [74].…”

Section: Core-shell Anode Of Sltn-lsbcmentioning

confidence: 98%

“…Co-doping has been certified to successfully increase the electrical characteristics of ceria-based electrolytes [23]. The (La 0.75 Sr 0.2 Ba 0.05 ) 0.175 Ce 0.825 O 1.891 (LSBC) is a typical electrolyte for ITSOFCs utilized and developed in our research group [24]. When the ceria-based electrolyte material is ready selected for an ITSOFC, the lowering interface charge transfer and diffusion impedances are determined mainly by the electrode materials selection and manipulating the microstructures of electrodes.…”

Section: Polarizations Of Fuel Cellsmentioning

confidence: 99%

“…The ABO 3 structure of (Sr 0.7 La 0.3 )(Ti 0.9 Nb 0.1 )O 3 (SLTN) anode reveals relative conductivity in reducing atmospheres. The multiple-elements doped ceria-based electrolyte (La 0.75 Sr 0.2 Ba 0.05 ) 0.175 Ce 0.825 O 1.89 (LSBC) displays superior ionic and electrocatalytic attributes at intermediate temperatures [24,47,55]. The core-shell particles SLTN-LSBC as anode materials were constructed, and electrical characteristics of anodes were characterized [56].…”

Section: Core-shell Electrodes Preparation 21 Core-shell Anode Preparationmentioning

confidence: 99%

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An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

2021

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Lowering the interface charge transfer, ohmic and diffusion impedances are the main considerations to achieve an intermediate temperature solid oxide fuel cell (ITSOFC). Those are determined by the electrode materials selection and manipulating the microstructures of electrodes. The composite electrodes are utilized by a variety of mixed and impregnation or infiltration methods to develop an efficient electrocatalytic anode and cathode. The progress of our proposed core-shell structure pre-formed during the preparation of electrode particles compared with functional layer and repeated impregnation by capillary action. The core-shell process possibly prevented the electrocatalysis decrease, hindering and even blocking the fuel gas path through the porous electrode structure due to the serious agglomeration of impregnated particles. A small amount of shell nanoparticles can form a continuous charge transport pathway and increase the electronic and ionic conductivity of the electrode. The triple-phase boundaries (TPBs) area and electrode electrocatalytic activity are then improved. The core-shell anode SLTN-LSBC and cathode BSF-LC configuration of the present report effectively improve the thermal stability by avoiding further sintering and thermomechanical stress due to the thermal expansion coefficient matching with the electrolyte. Only the half-cell consisting of 2.75 μm thickness thin electrolyte iLSBC with pseudo-core-shell anode LST could provide a peak power of 325 mW/cm2 at 700 °C, which is comparable to other reference full cells’ performance at 650 °C. Then, the core-shell electrodes preparation by simple chelating solution and cost-effective one process has a potential enhancement of full cell electrochemical performance. Additionally, it is expected to apply for double ions (H+ and O2−) conducting cells at low temperature.

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Section: Core-shell Anode Of Sltn-lsbcmentioning

confidence: 98%

Section: Polarizations Of Fuel Cellsmentioning

confidence: 99%

Section: Core-shell Electrodes Preparation 21 Core-shell Anode Preparationmentioning

confidence: 99%

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An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

2021

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“…Previous literature in the related field is quite limited. [2][3][4] This paper adopts the low-temperature combustion synthesis (LCS) to prepare CGO and doped 2Fe-CGO samples. LCS method may generate nano-scale particles.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Doped Iron Oxide on the Performance of Ceria-Based Solid Electrolyte

Zhang

2013

j nanosci nanotechnol

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The research of ceria-based electrolyte is of great significance for application of medium or low temperature solid oxide fuel cells. In this paper, Ce0.8Gd0.2O(2-delta) (CGO) and CGO doped with 2.0 mol% FeO1.333 (2Fe-CGO) were synthesized by low-temperature combustion method, and the effects of doped iron oxide on density and conductivity were studied. The experimental results indicated that the relative density of 2Fe-CGO increased within a certain temperature range due to the occurrence of viscous flow sintering. It was found that Fe3O4 could clear SiO2 impurities in the grain boundary, which can greatly enhance the conductivity of 2Fe-CGO. The conductivity of 2Fe-CGO was two orders of magnitude larger than CGO's when the test temperature was 250 degrees C.

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“…This degrades the grain boundary conductivity, as a result of the depletion of oxygen vacancies [2,19,22]. In addition, the reduction to the nanoscale of grain size has been quite valuable for enhancing the electrical conductivity of ceria-based SOEs in the IT range due to resistive blocking layers of Si-rich phases at the grain boundaries [2,23]. Furthermore, Tschö pe and Birringer [24] and Kim et al [25] contended that this observation in nanocrystalline materials cannot be explained merely by the reduction of the segregated impurities per grain boundary in that it may also be due to the accumulation of Ce 3þ in the proximity of the grain boundary, giving rise to the transition from ionic to electronic conductivity with decreasing grain size.…”

Section: Introductionmentioning

confidence: 99%

Addition effects of erbia-stabilized bismuth oxide on ceria-based carbonate composite electrolytes for intermediate temperature-−solid oxide fuel cells

Baek

Lee

Kim

et al. 2012

International Journal of Hydrogen Energy

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Effects of rapid process on the conductivity of multiple elements doped ceria-based electrolyte

Cited by 18 publications

References 40 publications

An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

An Overview on the Novel Core-Shell Electrodes for Solid Oxide Fuel Cell (SOFC) Using Polymeric Methodology

The Influence of Doped Iron Oxide on the Performance of Ceria-Based Solid Electrolyte

Addition effects of erbia-stabilized bismuth oxide on ceria-based carbonate composite electrolytes for intermediate temperature-−solid oxide fuel cells

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