Journal of Physical Chemistry C
·
2023
·
IF 3.7
Chencheng Ye,Susu Bi,Pengfei Liao,Yanni Huang,Xiao Lin,Yu Wang,Linjuan Zhang,Jian-Qiang Wang
An efficient and stable NiO-8YSZ hydrogen electrode for solid oxide cells (SOCs) is vital in the context of increasing global intermittent renewable energy sources. Most fundamental studies of SOCs have been carried out using button cells with small active areas, whereas the screen-printing of NiO-8YSZ hydrogen electrodes required for large-area SOCs have been ignored. In this study, we provide an alternative method for designing a highly active and stable fuel electrode for SOCs application by improving the slurry dispersant effect. The dispersion states and stabilities of NiO-8YSZ screen-printing slurries were quantitatively analyzed using the instability index, relaxation time, and viscosity. Scanning electron microscopy images of the resultant films indicate that the microstructure can be improved by optimizing the dispersants within the ink. The electrochemical performance of the resulting SOCs with optimized hydrogen electrode microstructures was examined at a 5 × 5 cm2 scale (16 cm2 active area). Single cells delivered a peak power density of 0.57 W·cm–2 at 750 °C in fuel cell mode and had a high current density of −0.81 A·cm–2 at 1.30 V in electrolysis mode. These results highlight the potential for large-scale high-performance SOCs production by designing NiO-8YSZ electrode nanostructures via a proper dispersant with the stability of screen-printing paste.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Yihang Dong,Xiaoming Sun,Anran Mu,Zhaoyang Liu,Guoxing Qiu,Xiaofang Zhang,Ye Han,Jianxu Ding,Xiangnan Wang
In this manuscript, (8YSZ) 1- x (CeO 2 ) x (0 ≤ x ≤ 0.6), belonging to the cubic fluorite structure, was prepared by a co-precipitation method. We highlighted the effect of a dense diffusion barrier conductivity on the sensing performance by choosing the lowest conductivity of (8YSZ) 0.4 (CeO 2 ) 0.6 as a dense diffusion barrier compared with the highest conductivity of (8YSZ) 0.9 (CeO 2 ) 0.1 published. A sensor was fabricated using bonding Pt paste. Limiting current ( I L ) platforms were obtained at different oxygen concentrations x (O 2 ) in a temperature range of 720–900 °C. The oxygen sensor had a smaller oxygen measurement range of 0–10% at 850 °C compared to (8YSZ) 0.9 (CeO 2 ) 0.1 as a diffusion layer . These results showed that the higher oxide ion conductivity of the diffusion layer can achieve a wider oxygen measurement range, which can guide the search for new mixed conductor with higher oxide ion conductivity. The sensing performance of the oxygen sensor was not influenced by p (H 2 O) and x (CO 2 ), which showed the sensor had a strong selectivity towards oxygen. Furthermore, the limiting current of the sensor remained stable during 144 h of detection.
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产品关联
DOI
高影响因子
SOLID STATE PHENOMENA
·
2018
·
IF 0
Min Wang,Zi Yuan Wang,Ya Jie Yuan,Wei Pan
The 8 wt.% yttria-stabilized zirconia (8YSZ) thermal barrier coatings (TBCs) are widely used to protect hot superalloy components of gas turbine and jet engine. However, Cracks and pores in the 8YSZ coating would accelerate the oxidation of the bondcoat alloy and the corrosion of 8YSZ topcoat by molten salts and finally result in permanent failure of the TBCs. Hence, in this work, a sol-gel spin-coating method was employed to prepare a dense α-Al2O3 film on the surface of air-plasma-sprayed 8YSZ coatings, in order to block the paths of cracks and pores while keeping the stress tolerance of 8YSZ coatings. The influences of the polyvinylpyrrolidone (PVP) and alumina content of the sol on the microstructure of the α-Al2O3 film were investigated. It is found that a sol with PVP addition amount of 50 mg/mL and alumina solid content of 10% let to the achievement of a compact α-Al2O3 film. The positive results in this work would inspire more efforts to prepare dense films on TBCs and therefore improve their performance under service conditions.
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产品关联
DOI
CORROSION SCIENCE
·
2026
·
IF 10.3
Zhe Wang,Luiz Pereira,Hairong Mao,Donald B. Dingwell,Wenjia Song
The degradation of yttria-stabilized zirconia (YSZ) by silicate melts is a first order challenge to aviation. Yet the respective roles of dissolution thermodynamics and kinetics remain insufficiently distinguished. Here, in an effort to decouple these effects, three naturally-occurring (sand, dust, and volcanic ash) and five synthetic silicate melts were reacted with 8YSZ for up to 100 h. Corrosion depths were determined from the yttrium-depleted, mechanically softened, zone and quenched interfaces which largely preserve the high-temperature reaction state, were mapped. The naturally-occurring melts exhibited a complex behavior whereby ash melt penetrated rapidly at early stages but was arrested at 29 μm, whereas sand melt exhibited sustained penetration to 49 μm. The yttrium solubility index, calculated with the aid of compositional correlation models, exhibits a higher correlation with the terminal degradation depth than other, more conventional composition-based descriptors. The kinetic fragility index captures the transitions between continuous dissolution, crystallization-induced passivation, and penetration arrest. A two-parameter map based on these two parameters (thermodynamic capacity and kinetic fragility) can be used to illustrate and rationalize the degradation trajectories of silicate melts against 8YSZ. This approach provides a potential basis for screening corrosive deposits based on their composition-projected thermodynamic capacity and kinetic fragility for the customized regional design of more resistant ceramic systems.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 17
·26530-26538
·
IF 3.83
Xiqian Zhang,Qionglian Yang,Lin Chen,Peng Song,Jing Feng
8 wt% yttria-stabilized zirconia (8YSZ) powders are fabricated as high-temperature based materials via a solid-state reaction method and ground into spheres in this paper. Following that, 4 wt% Nickle (Ni), 4 wt% Hexagonal Boron Nitride (hBN) and 4 wt% PHB (Polyphenyl ester) are added to 8YSZ for getting 8YSZ ceramic-based abradable seal powders (8YSZ CAS p ). Then, the 8YSZ CAS p are sprayed on the stainless steel substrate with a NiCoCrAlY transition layer by an atmospheric plasma spraying (APS) technology. The phase structure, surface morphology and the cross-section topography of the fabricated are analyzed, the indentation hardness and nano-indentation test are conducted. The experiments of 8YSZ ceramic-based abradable seal coatings (8YSZ CAS c ) show that the deposition efficiency and porosity are respectively 78.5% and 21.8%, the bond strength is 4.6 MPa, the cycle number of thermal shock resistance is 37 times, those parameters prove that the fabricated 8YSZ CAS c are promising abradable seal coatings.
研究领域:
材料科学
·
陶瓷涂层
·
表面工程
·
等离子喷涂
·
高温材料
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 3
·1221-1228
·
IF 2.8
Qi Min,Wang Xiangnan,Shu Hui,Dong Yihang
(8YSZ) 1− x (Cr 2 O 3 ) x ( x = 0, 0.05, 0.10, 0.15) are prepared by the co-precipitation method. Diffraction peaks of the samples belonged to the cubic fluorite structure. Conductivity decreases first and then increases with increasing Cr 2 O 3 content. An oxygen sensor based on 8YSZ solid electrolyte and (8YSZ) 0.85 (Cr 2 O 3 ) 0.15 diffusion barrier is prepared by the Pt slurry bonding method. The sensor has a limiting current plateau at 2% oxygen concentrations within 720 ~ 870 °C. The oxygen sensor has a linear relationship between the log I L and 1000/ T . At 850 °C, a linear relationship between the limiting current I L and oxygen concentration x (O 2 ) is established for the oxygen sensor. The oxygen sensor is provided with a limiting current plateau within the experimental concentration division, and the limiting current plateau is not affected by x (CO 2 ) and p (H 2 O). I-V curves of the oxygen sensor overlap, and the limiting current plateaus are almost equal under the long-term high-temperature operating conditions of 144 h.
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Penghui Chen,Qian Wang,Dianjun Hu,Danyang Zhu,Haohong Chen,Zhengfa Dai,Qiang Liu,Jiang Li
8YSZ precursor was synthesized by the co-precipitation method using ammonia as the precipitant. The influences of calcination temperature on the phase, morphology and dispersity of 8YSZ nanopowders were investigated. It was found that the 8YSZ nanopowders calcined at 800 °C had the best sinterability with the mean particle size of 14.5 nm. 8YSZ ceramics were then fabricated by air pre-sintering at 1250–1325 °C followed by HIP post-treatment at 1550 °C. The influences of pre-sintering temperature on the microstructure and optical transparency of 8YSZ ceramics were studied. It was found that the 8YSZ ceramics pre-sintered at 1300 °C had a suitable microstructure. The HIP post-treatment temperature was successfully reduced by 200 °C for the 8YSZ transparent ceramics from co-precipitated powders compare with our previous works. In-line transmittance of the 8YSZ ceramics (1.0 mm in thickness) reached 65.7% at 800 nm and the average grain size was 25 μm.
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.9
Qing Liu,Shenxiang Luo,Sai Liu,Jinwei Guo,Xiaopeng Hu,Wang Zhu
Conventional 8YSZ thermal barrier coatings (TBCs) often experience crack initiation and premature spallation due to phase transformation-induced volume changes at high temperatures, limiting their application. In contrast, YTa 3 O 9 shows great potential as a next-generation TBC material due to its unique double-oriented domain structure, which offers low thermal conductivity and minimal volume changes during phase transformation. In this paper, YTa 3 O 9 single-layer and YTa 3 O 9 /8YSZ double-ceramic-layer (DCL) TBCs are prepared via atmospheric plasma spraying (APS). A comprehensive evaluation of their service life and failure behavior is performed through high-temperature oxidation, high-temperature thermal shock, and high-temperature CMAS corrosion thermal shock tests. The results show that YTa 3 O 9 /8YSZ DCL-TBCs exhibit the significantly enhanced high-temperature performance and serve life compared to the YTa 3 O 9 single-layer TBCs. The introduction of CMAS corrosion media accelerates coating failure, reducing the thermal cycle life of YTa 3 O 9 single-layer TBCs and YTa 3 O 9 /8YSZ DCL-TBCs by 62.76% and 53.33%, respectively, compared to thermal shock alone. YTa 3 O 9 coating in YTa 3 O 9 /8YSZ DCL-TBCs undergoes layer-by-layer spallation to release stresses in a self-sacrificing manner, thereby protecting the underlying structural components.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jinjin Zhang,Luyang Wei,Xiuxia Meng,Fangyong Yu,Naitao Yang,Shaomin Liu
Digital light processing (DLP)-stereolithography three-dimensional (3D) printing is a well known technique for fabricating components with complex geometries. However, the application of DLP 3D printing to functional ceramics such as 8 mol% yttria-stabilized zirconia (8YSZ), which is one of the most extensively used electrolyte materials for solid oxide fuel cells, is still a great challenge. Therefore, the fabrication of fully 8YSZ monoliths via DLP 3D printing was attempted herein, including the preparation of UV-curable ceramic suspensions, shaping of green bodies, and debinding and sintering. The results show that intact green bodies printed using a 30 vol% 8YSZ-photosensitive resin suspension with 0.1 wt% oleic acid as the dispersant under the optimized printing conditions was sufficiently dense without connected pores after vacuum debinding and sintering in air. The successful fabrication of 8YSZ monoliths with design flexibility via 3D printing provides a simple method for preparing functional ceramic components and may expand the application of 3D printing technology to the energy field.
研究领域:
材料科学
·
增材制造
·
陶瓷
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）