Crystals
·
2021
·Vol. 11
·期 12
·1573
·
IF 2.589
Xiaoqing Si,Xiaoyang Wang,Chun Li,Tong Lin,Junlei Qi,Jian Cao
Reactive air brazing has been widely used in fabricating solid oxide fuel/electrolysis cell (SOFC/SOEC) stacks. However, the conventional Ag–CuO braze can lead to (I) over oxidation at the steel interconnect interface caused by its adverse reactions with the CuO and (II) many voids caused by the hydrogen-induced decomposition of CuO. The present work demonstrates that the Ag particle interlayer can be used to join yttria-stabilized zirconia (YSZ) electrolytes to AISI 441 interconnect in air instead of Ag–CuO braze. Reliable joining between YSZ and AISI 441 can be realized at 920 °C. A dense and thin oxide layer (~2 μm) is formed at the AISI 441 interface. Additionally, an interatomic joining at the YSZ/Ag interface was observed by TEM. Obtained joints displayed a shear strength of ~86.1 MPa, 161% higher than that of the joints brazed by Ag–CuO braze (~33 MPa). After aging in reducing and oxidizing atmospheres (800 °C/300 h), joints remained tight and dense, indicating a better aging performance. This technique eliminates the CuO-induced issues, which may extend lifetimes for SOFC/SOEC stacks and other ceramic/metal joining applications.Keywords:solid oxide fuel/electrolysis cells;sintering;YSZ;Ag particle interlayer;aging
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2026
·
IF 13.8
Han Zhang,Mingyu Gao,Jiajia Deng,Yan Wang,Yingru Li,Xinjian Song,Rong Li,Jianfeng Tan
Traditional inorganic semiconductor gas sensors operate at elevated temperatures and exhibit inherent rigidity and brittleness, thereby limiting their application in wearable electronics. Herein, organic–inorganic YSZ@PANI/SnS 2 heterojunction composite nanofiber film are fabricated through a sequential process involving electrospinning, oxidative polymerization, and hydrothermal treatment. Benefited from the employment of PANI interfacial layer, biomimetic “branch-leaf” structure featuring vertically grown, network-like SnS 2 nanosheets, the stress and energy are dispersed and dissipate effectively, therefore enhance the mechanical flexibility. Simultaneously, the vertically staggered SnS 2 nanosheets accelerating the gas diffusion/transmission and providing abundant active sites. The formation of PANI/SnS 2 heterojunction, which endows the composite with elevated conductivity, reaction activity, and carrier transport separation efficiency. At room temperature (RT, 25 °C), the device exhibits high response value and response/recovery times of 9.35 and 12/25 s to 2 ppm NO 2 , respectively. Furthermore, the device maintains satisfactory responsiveness even under bending conditions. This research presents a promising novel approach for fabricating organic–inorganic composite nanofibers, which may contributes to the development of flexible RT gas sensors.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yan-An Li,Jia-Hong Li,Xiang-Xiang Pan,Xiang-Qi Liu,Wan-Ming Li,Chang-Qing Liu,Cheng-Xin Li
Inert ceramic-supported solid oxide fuel cells (SOFCs) are critical for advancing long-life, high-stability SOFC energy systems. Using an MgO-MgAl 2 O 4 (MMA) substrate, we developed the high-performance industrial-sized MMA-supported flat-tubular segmented-in-series SOFCs (FT-SIS-SOFCs) through a co-sintering process. Dense electrolytes were obtained by implementing bimodal particle engineering to regulate sintering shrinkage behavior. Through precise control of the nanoparticle (∼100 nm) to submicron particle (∼300 nm) mass ratio at 7 : 3, the sintering shrinkage mismatch between the YSZ electrolyte and MMA substrate was reduced from 6.2% to 0.5%, and the warpage deformation decreased from a compressive strain of -0.113 to less than 0.05. The optimized cell demonstrated a maximum power density of 342 mW/cm 2 with an open-circuit voltage of 1.006 V at 850 °C, coupled with exceptional long-term stability. The industrial-sized warpage-free 16-cell FT-SIS-SOFCs exhibited a high open-circuit voltage of 17.50 V and maximum power output of 6.55 W at 850 °C.
研究领域:
能源材料
·
陶瓷工程
·
燃料电池技术
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiaoqing Jiang,Jie Zou,Yongjian Ni,Yuheng Wang,Xianwei Qian,Xuebin Li,Shihao Wei,Yuanjie Su,Guangzhong Xie,Mingjun Zhou,Jiawen Jian
The catalytic activity of an oxygen-pumping electrode is very important to the performance of amperometric NO x (NO and NO 2 ) sensors. To enhance the stability of electrochemical NO x sensors based on Pt electrodes, we fabricated sensitive electrodes of Pt-based materials doped with small and different Au contents on 8% mol Y 2 O 3 -stabilized ZrO 2 (8YSZ) solid electrolyte substrates by screen printing and high-temperature co-firing. The effects of Au on the porous Pt electrode’s catalytic activity and long-term stability were investigated, and the results are as follows. First, the catalytic capacity of the Pt–Au alloy electrode decreases with increasing Au content due to the inhibition of the oxygen adsorption on Au, which decreases the amount of oxygen participating in the reaction at triple-phase boundaries (TPBs). Second, the catalytic ability of the alloy electrode decreases exponentially with aging time due to the reduction in the length of TPBs caused by the significant reduction in the number of holes in the electrode, and the oxidation of Pt. In addition, the conductivity decay rate of the electrode decreases with increasing Au doping. This indicates that Pt-based electrodes doped with varying Au contents, long-term, and high-temperature aging have notably regular effects on the catalytic activity of oxygen-pumping electrodes, for which we have developed a model of Au passivation and the synergistic effect of aging time on the activity of Pt-based oxygen-pumping electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Ben Ma,Kai Li,Bo Chi,Jian Pu,Jian Li
LaNbO 4 –NiO–Y 2 O 3 stabilized ZrO 2 (YSZ) composites are prepared and investigated as an anode-support material for solid oxide fuel cells. To tailor the coefficient of thermal expansion (CTE), electrical conductivity, fracture strength σ and fracture toughness K IC of the composite, various amounts of LaNbO 4 from 0 to 30 wt.% are added into 53 wt.% NiO–47 wt.% YSZ composite. With LaNbO 4 addition into the NiO–YSZ, σ changes insignificantly, whereas CTE decreases and K IC increases monotonously. For 30 wt.% LaNbO 4 –NiO–YSZ, the CTE is 12.4 × 10 − 6 K − 1 (250–1000 °C), which is much closer to that of YSZ, and the K IC is 3.1 MPa-m 1/2 , which is 42% increase compared with that of the NiO–YSZ. The increase in fracture toughness is possibly due to the domain switch within LaNbO 4 and the overall grain refinement of the composite. The electrical conductivity of the reduced composites decreases with increasing the amount of LaNbO 4 and shows metallic conducting behavior with temperature.
研究领域:
材料科学
·
能源工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yang Feng,Yong Shang,Yanling Pei,Guanghua Liu,Jian Sun,Yang Lu,KeKe Chang,Shengkai Gong,Huibin Xu
The corrosion behavior of yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) under the synergistic effect of calcium-magnesium-alumina-silicate (CMAS) and NaCl under near-service conditions (the flame temperature can reach 1900°C and the flame speed can reach 0.5Mach) was investigated using a burner rig. The results indicated that when the surface temperature of the top coating (TC) (∼1200°C) was lower than the melting point of the CMAS, after thermal shock in a water environment, the phase of the CMAS on the TC surface remained stable, and the CMAS did not penetrate the TC interior. However, after thermal shock in a NaCl environment, the presence of NaCl disrupted the silicate network structure of CMAS, lowering its melting point and viscosity; meanwhile, the high-speed flame (0.5 Mach) promoted the penetration of CMAS melt into the TC, resulting in a porosity decrease in TC from 8.4 ± 0.88% to 6.92 ± 0.53%. The dominant mechanism of CMAS infiltration into TC changed from capillary-driven to a combined capillary-dynamic process. Meanwhile, the transformation of the chain-structured diopside (Ca(Mg, Al)(Si, Al) 2 O 6 ) in the CMAS to the island-structured magnesium feldspar (Ca 2 MgSi 2 O 7 ). Additionally, NaCl accelerated the formation of the non-protective oxide Cr 2 O 3 in the thermally grown oxides layer. This study provides new insights into the corrosion protection and performance optimization of TBC systems under near-service conditions.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Jinjun Hu,Wei Meng,Shuang Qi,Ling Wang,Weiwei Meng,Yuehua Li,Lei Dai
Conventional sensing of nitrogen oxide (NO) is based on charge transfer reactions that occur exclusively at the triple-phase boundaries (solid electrolyte/sensing electrode/NO, TPBs). Here, an interface-engineered strategy is proposed to overcome this limitation by constructing a bidirectional mixed ionic-electronic conducting (MIEC) architecture. By modifying a porous YSZ scaffold with NiO to introduce an electron-conducting phase, a mixed conductive heterogeneous porous framework, NiO-YSZ, was formed. Subsequently, La 0.8 Sr 0.2 Co 0.2 Fe 0.8 O 3-δ (LSCF) active sensing phase was incorporated into this framework via an impregnation method, ultimately resulting in a 3D composite sensing electrode (LSCF-NiO-YSZ) that possesses both ionic and electronic conductivity. This design expands the active site region beyond TPBs and enables more efficient charge transfer. The influence of YSZ/NiO mass ratios was systematically examined, and sensors based on NiO-modified YSZ exhibited markedly higher response values and improved sensitivity compared to pristine YSZ. The optimal composition (YSZ/NiO = 5:5) delivered a sensitivity of 10.29 °·decade −1 with excellent reproducibility and selectivity at 500°C and 0.1 Hz. These results highlight interface conduction engineering as an effective route for achieving high-performance impedancemetric NO sensors.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Zhixiang Liu,Yang Zhang,Jun Yang,Wanbing Guan,Jianxin Wang,Subhash C. Singhal,Lianbang Wang
The conventional Ni-Y 0.16 Zr 0.84 O 1.92 anode in solid oxide fuel cells fueled with hydrocarbon fuels is prone to suffer from carbon deposition. In this work, we employed an in-situ solvothermal method to decorate the Ni-Y 0.16 Zr 0.84 O 1.92 anode with Gd 0.1 Ce 0.9 O 1.95-δ nanoparticles to improve its resistance to carbon deposition and thus improve the electrochemical performance of the cell. This method generates small Gd 0.1 Ce 0.9 O 1.95-δ particles and at the same time does not block the gas diffusion channels. The Gd 0.1 Ce 0.9 O 1.95-δ -decorated anode showed enhanced long-term stability in methane with no significant performance degradation after 700 at 750 °C, whereas an untreated Ni-Y 0.16 Zr 0.84 O 1.92 anode only worked for less than 8 h under the same conditions. The addition of Gd 0.1 Ce 0.9 O 1.95-δ nanoparticles was found to enhance internal reforming reactions of methane by the distribution of relaxation times technique. This work demonstrated that in-situ solvothermal modification strategy can provide anodes with excellent carbon deposition resistance.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Xin Wang,Yujie Ren,Wenge Fan,Qingqing Zhu,Peilin Yuan,Peng Jin,Xiaodong Wei,Chufeng Sun
Yttria-stabilized zirconia (YSZ) ceramic-based flow passage components are highly susceptible to cavitation erosion. To counter this limitation, rare-earth oxide (REO, RE=La, Ce, Nd, Gd) doped YSZ with superior cavitation erosion resistance was successfully prepared using spark plasma sintering technology. The microstructures, phase compositions, mechanical properties, and cavitation erosion resistance of YSZ and REYSZ were investigated. The results indicate that REO doping promoted the generation of t'- and c-phases, leading to a denser structure and grain refinement. Moreover, the presence of a larger concentration of the t'-phase resulted in a higher microhardness and elastic modulus. Owing to its superior mechanical properties, fine grains and high density, REYSZ exhibited improved cavitation erosion resistance. Particularly, NdYSZ exhibited 12.4 times higher cavitation-erosion resistance than that of YSZ. Furthermore, the grain boundaries of YSZ contain special m-phase bands, which are also responsible for the quicker exfoliation of grains during cavitation erosion. The segregation of rare earth elements at the grain boundaries inhibited the generation of m-phase bands, resulting in a longer cavitation erosion incubation period for REYSZ.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Xiaoyang Cheng,Chen Wang,Biao Wang,Ruize Sun,Yingzhou Guan,Yanfeng Sun,Xishuang Liang,Peng Sun,Geyu Lu
In order to fabricate a high performance triple-phase-boundary (TPB) for a mixed potential type NO x sensor based on stabilized zirconia and oxide electrode, a porous surface of the yttria-stabilized-zirconia substrate (YSZ) was formed with pore-formers (PMMA, graphite and starch) using coating technique . SEM observation result indicated that the porous morphology in the final ceramic was related to the category and amount of the pore formers, so that the pore size and microstructure of YSZ layer could be controlled. The NO 2 gas sensors using above-mentioned modified YSZ substrate with porous surface and nano-structured NiO electrode were fabricated and evaluated. The electric potential difference (Δ V ) of the sensors varied almost linearly with the logarithm of NO 2 concentrations in the examined range of 10–500 ppm at 800 °C. The sensor based on 10 wt% starch-added YSZ matrix showed the largest response with the Δ V of 114 mV to 100 ppm NO 2 . It was also seen that the sensors showed good response-recovery transient, selectivity and repeatability to NO 2 .
研究领域:
材料科学
·
传感器与传感技术
·
电化学
·
陶瓷材料
·
环境监测
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jiaxin Li,Qunwei Guo,Jiangtao Feng,Yinwen Gu,Bo Chi,Jian Pu
Accurate and real-time detection of SO 2 at industrial emission sources is important for emission control, yet reliable sensing under high-temperature and relatively high-concentration conditions remains challenging. In this study, a YSZ-based mixed-potential SO 2 sensor was developed by regulating Nb nonstoichiometry in MnNb 2-x O 6 sensing electrodes and YSZ compositing. Nb deficiency altered particle coarsening, the apparent pore architecture of the electrode layer, and the defect chemistry. Among the single-phase sensing electrodes, MnNb 1.9 O 6 exhibited larger pore sizes and the highest oxygen-vacancy concentration, achieving a sensitivity of −14.76 mV/decade over 50-500 ppm SO 2 at 400 °C. Further compositing with YSZ produced more uniformed pore structure and increased the electrochemically active triple-phase-boundary (TPB) region, with MnNb 1.8 O 6 /20 wt% YSZ achieved the highest sensitivity of −18.74 mV/decade. A comparison of the composition series and YSZ-composite electrodes indicates that electrode microstructure and accessible TPB sites are the primary determinants of the electrochemical response, which enhance SO 2 diffusion and increase the number of active sites. Additionally, the increased oxygen vacancies also provide a synergistic contribution by promoting oxygen ion transport, further enhancing the overall reaction rate. The optimized sensor also showed good repeatability and 15-day stability, highlighting its potential for high-concentration SO 2 monitoring under industrially relevant dynamic-flow conditions.
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产品关联
DOI
高影响因子
Catalysts
·
2018
·Vol. 8
·期 5
·188
·
IF 3.465
Dalei Sun,Kaihong Xie,Yanxiong Fang,Xianghua Yang
One-pot synthesis ofN,N′-dialkylureas were successfully achieved from catalytic carbonylation of aliphatic primary amines with CO2as the carbon source and Y0.08Zr0.92O1.96mixed oxide (Yttria-stabilized zirconia, YSZ-8) as the heterogeneous catalyst. The yield of the target product was obtained up to 80.60% from a 48 h reaction with an aliphatic primary amine and 3.0 MPa CO2inN-methyl-2-pirrolidinone at 160 °C. A multi-pronged mechanistic study was carried out where factors that might influence the reaction efficiency were studied, including catalyst structure, substrates basicity, CO2pressure, solvent polarity and reaction time. The presence of oxygen vacancies in YSZ-8 was found to be essential for the carbonylation process by creating additional reduction potential for the activation of CO2which would lead to the key intermediate species.Keywords:Y0.08Zr0.92O1.96mixed oxide;N,N′-dialkylurea;carbonylation;CO2;heterogeneous catalysis
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）