CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Haibin Sun,Xue Guo,Jiao Li,Guochang Li,Zanzhong Yang,Hao Ding,Weilu Yan,Shuai Qi,Peng Wang,Youjie Song
In order to clarify the effect of grain size on the electrical performance of BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) solid electrolytes with addition of NiO, microcrystalline (~1.5 µm) and ultrafine-grained (~280 nm) BZCYYb electrolytes (with 1 wt% NiO) were fabricated by the conventional and two-step sintering method, respectively. The results show that compared with microcrystalline electrolytes, the ultrafine-grained electrolytes have similar grain-interior conductivities, but much lower grain-boundary conductivities, illustrating that the grain boundary is not conducive for ionic transport. As a result, the electrical conductivity of microcrystalline electrolytes (1.9 × 10 −2 S cm −1 at 600 °C in wet air) is higher than that of ultrafine-grained electrolytes (1.1 × 10 −2 S cm −1 at 600 °C in wet air). In addition, the OCV (open-circuit voltage) values of electrolyte-supported single cells show that the undesired electronic conduction exists in the electrolytes due to the BaY 2 NiO 5 impurity formed by the reaction of NiO and BZCYYb. The ultrafine-grained electrolytes show lower OCV values than that of microcrystalline ones, due to the prolonged electronic transport paths. Therefore, large-grained or grain boundary-free microstructure are necessary for improving the electrical performance of BZCYYb electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2014
·
IF 2.086
Mao Sen Wang,Jian Xin Wang,Chang Rong He,Ye Jian Xue,He Miao,Qin Wang,Wei Guo Wang
In this study, BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3− δ (BZCYYb) was incorporated into La 0.6 Sr 0.4 CoO 3− δ (LSC) to form a composite cathode LSC–BZCYYb. The X-ray diffraction (XRD) results demonstrate that BZCYYb has an extremely desirable chemical compatibility with LSC below 1200 °C. The thermal expansion coefficient (TEC) measurements indicate that incorporating 30 wt% BZCYYb enables the TEC of the composite cathode to be significantly reduced to 14.7×10 −6 K −1 from 20×10 −6 K −1 (LSC). The influence of the sintering temperature , composition and thickness on the microstructure as well as the electrochemical properties of the LSC–BZCYYb cathode were investigated. A Scanning electron microscope (SEM) testing shows that the LSC–BZCYYb cathode sintered at 950 °C has an optimum microstructure with good adhesion to the GDC interlayer and higher porosity. Electrochemical measurements reveal that 0.7LSC–0.3BZCYYb sintered at 950 °C with a thickness of approximately 20 μm possesses the minimum activation energy ( E a =1.32 eV) and polarization resistance ( R p ), measuring approximately 0.116 Ω cm 2 at 650 °C. This study confirms that the composite 0.7LSC–0.3BZCYYb cathode has the great potential to be a cathode material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Xiaoyang Wang,Xiaoqing Si,Mingshen Li,Qihan Zhou,Jianwei Gao,Chun Li,Junlei Qi,Jian Cao
Y 2 W 3 O 12 particles with negative thermal expansion (NTE) can offset the high thermal expansion of Ag-based sealants, thus relieving the residual stress of electrolyte/interconnect joints in protonic ceramic fuel cell (PCFC) stacks. Nevertheless, violent interfacial reactions between Y 2 W 3 O 12 particles and BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ electrolyte have severely restricted the application of these NTE particles. Herein, novel Y 2 W 3 O 12 @SiO 2 composite particles with a core-shell structure are successfully designed to address this conundrum. The thermal expansion coefficient of Ag-based sealant is lowered from 19.7 to 14.6 ppm/K by adding 20 wt% Y 2 W 3 O 12 @SiO 2 particles. During joining, the SiO 2 shell significantly reduces the reaction consumption of Y 2 W 3 O 12 , fully exploiting its NTE properties. Meanwhile, a tiny portion of SiO 2 participates in and regulates interfacial reactions, generating mechanically matched reaction layers. Finite element simulation demonstrates that introducing Y 2 W 3 O 12 @SiO 2 particles significantly releases the compressive X-stress near the BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ interface, thus increasing the joint strength from ∼25.3 to ∼32.4 MPa. Obtained joints maintain long-term stability in oxidizing and reducing atmospheres at 600 °C, suggesting the applicability of Y 2 W 3 O 12 @SiO 2 composite particles in fabricating PCFC stacks. Our work provides a new strategy for preparing NTE materials with controllable interfacial reactions and service capability under extreme conditions.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiaming Chu,Haiyang Lan,Ting Chen,Yihan Ling,Zixian Wang,Ruiqing Song,Weitao Jin,Juan Zhou,Shaorong Wang
To address the challenge of low-temperature catalytic activity of oxygen electrodes , a high-activity triplex ionic conductor material, PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF), is prepared using electrospinning. The preparation PBSCF and BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) nanofibers composite electrodes are used with different composite methods to improve the catalytic activity and the proton transport pathway within the electrode. The results show that PBSCF@BZCYYb prepared by PBSCF and BZCYYb pre-mixed one-step electrospinning has high porosity and 3D interwoven continuous transmission path, exhibiting minimal polarization impedance on symmetric cells. The electrolysis cell with PBSCF@BZCYYb|BZCYYb|NiO-BZCYYb (active layer) |NiO-BZCYYb (support layer) structure shows electrolysis current densities of 775.4 mA cm −2 under 1.3 V at 650 °C with 20%H 2 O+80%Air atmosphere. Additionally, during the constant voltage electrolysis, the cell shows acceptable stability in 60 h at 650 °C, considered to be a promising oxygen electrode material in this work.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zhongwei Yue,Meiting Guo,Zihao Chen,Huihong Tang,Jingwei Li,Zhishan Li,Kongfa Chen,Yan Chen,San Ping Jiang
The cathode/electrolyte interface plays a crucial role in the electrochemical performance and long-term operation stability of protonic ceramic fuel cells (PCFCs). In this study, electrochemical polarization-induced evolution of the interface of PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF) cathode/BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3−δ (BZCYYb) electrolyte, and its effect on the electrochemical performance of the single cell, were investigated. The results show that the peak power density of the cell increases from 0.67 W cm −2 at 0 h to 0.94 W cm −2 at 40 h during electrochemical polarization, and then decreases to 0.89 W cm −2 at 100 h as a result of the competition between the reduced ohmic resistance ( R Ω ) and the increased polarization resistance ( R p ). The microstructure of the cathode/electrolyte interface under cathodic polarization is characterized by the segregated CeO 2 -based nanoparticles at the PBSCF/BZCYYb interface, which enhances the interfacial contact between PBSCF and BZCYYb, and improves the grain and grain boundary conductivities of BZCYYb. On the other hand, SrO and Fe 2 O 3 segregation occurs on PBSCF under electrochemical polarization conditions, which is detrimental to the surface exchange and charge transfer processes and reduces the catalytic activity of the electrode. This study demonstrates that cation diffusion and segregation in the PBSCF electrode and BZCYYb electrolyte greatly affect the performance and stability of the cell, and thus the fundamental understanding and control of the cathode/electrolyte interface evolution is critical for the development of PCFCs.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Meiting Guo,Zhishan Li,Lang Tang,Jingwei Li,Zehua Wang,Bo Wang,Zongping Shao,San Ping Jiang,Zhongwei Yue
Due to their low activation energy and high mobility of proton transfer, protonic ceramic cells (PCCs), including protonic ceramic fuel cells (PCFCs) and protonic ceramic electrolysis cells (PCECs), working at relatively low temperatures (400–700 °C) have gained increasing attention as promising and highly efficient energy conversion and storage technologies to replace the oxide ion-conducting, high-temperature solid oxide cells (SOCs). However, similar to SOCs, Fe–Cr based alloys are also commonly used as metallic interconnects in PCCs. Thus, the practical applicability of Ba-containing proton conducting electrolytes in PCCs is fundamentally related to their tolerance and resistance towards the deposition and poisoning of the volatile chromium species from the Fe–Cr based interconnect. This study focuses on the interaction between the Cr species and the most widely used proton conducting electrolyte BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb1711) within a temperature range from 400 °C to 700 °C. Results indicated that barium oxide and the BZCYYb1711 powder reacted with the Cr2O3 powder at 250 °C and 400 °C, respectively, while the deposition of Cr species on the BZCYYb1711 electrolyte surface occurred at temperatures as low as 500 °C. Ba segregated from the BZCYYb1711 electrolyte and reacted with gaseous Cr species, forming BaCrO4 and causing a significant depreciation in Ba content in the electrolyte. The Cr species also diffused into the inner layer of BZCYYb1711, leading to the segregation of CeO2 and degrading the conductivity of the electrolyte. This study demonstrates that the deposition and poisoning of the Cr species from the Fe–Cr based metallic interconnect are serious issues for the practical and long-term applicability of Ba-containing protonic ceramic materials in PCCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yunjie Gou,Yating Zhao,Jing Zhang,Wang Sun,Jinshuo Qiao,Kening Sun,Zhenhua Wang
BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) has been widely adopted as the electrolyte for protonic ceramic fuel cells (PCFCs). However, the synthesis and densification process of BZCYYb is too complex, which has greatly hindered the application of PCFCs. In this work, for the first time, we synthesized and densified uniform BZCYYb electrolytes within one step via step-wise current reactive flash sintering (SCRFS). Direct current is applied to the BZCYYb oxide precursor, and the input electric energy is converted into Joule heat, so that the sample can achieve synthesis and densification within 10 min. Compared with reactive flash sintering (RFS), the step-wise current control in SCRFS restricts the heating rate to ensure a uniform microstructure. When the current limit is 1.2 A (160 mA mm −2 ), the relative density is as high as 93.9%, and the sample has good conductivity. Therefore, SCRFS provides a new approach for the manufacture of BZCYYb electrolytes, and has the potential to be applied to achieve one-step uniform synthesis and densification of various ceramics.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Peng Chen,Zeping Chen,Daxiang Xue,Dongliang Liu,Wenhuai Li,Wanqing Chen,Qiang Niu,Meigui Xu,Wei Wang,Chuan Zhou,Wei Zhou
Protonic ceramic cells (PCCs) are recognized as a promising energy conversion technology for green hydrogen and electricity production owing to their high efficiency, all-solid-state structure, and exceptional reversibility. However, the inadequate mechanical strength of proton-conducting electrolytes remains a critical challenge hindering the widespread application of PCCs. In this study, a cation regulation strategy is employed to enhance the electrolyte mechanical strength by doping silicon (Si) at the B-site of the conventional proton-conducting material BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3 − δ (BZCYYb). The optimized Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 0.99 Si 0.01 O 3 − δ (BZCYYbSi) demonstrates significantly improved grain boundary conductivity, structural stability, and mechanical strength, achieving a hardness of 3.11 GPa—1.5 times greater than that of pristine BZCYYb (1.14 GPa). The PCC incorporating a thin-film BZCYYbSi electrolyte exhibits a peak power density of 1.179 W cm −2 at 600 °C in fuel cell mode and an electrolysis current density of 1.591 A cm −2 at 1.3 V/600 °C, outperforming the BZCYYb-based counterpart (0.994 W cm −2 and 1.244 A cm −2 ). Additionally, the BZCYYbSi-based PCC maintains a stable operation for over 370 h at 550 °C in a continuous discharge and electrolysis situation. This work provides new insights for the design and fabrication of mechanically strengthened and high-performance electrolytes for low-temperature PCCs.
研究领域:
材料科学
·
固态离子学
·
能源材料
·
电化学
·
陶瓷工程
·
氢能技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2022
·Vol. 8
·期 5
·1001-1008
·
IF 8.589
Xiaoyang Wang,Chun Li,Qihan Zhou,Mingshen Li,Mushi Zheng,Junlei Qi,Xiaoqing Si,Jian Cao
One of the critical challenges for the protonic ceramic fuel cell stack is sealing electrolytes and interconnects. However, the traditional Ag CuO sealant will aggravate the oxidation along the interconnect surface and result in brittle compound layers at the BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3- δ (BZCYYb) electrolyte interface. The present work demonstrates that a silver particle interlayer with high dislocation density can be adopted to join BZCYYb electrolyte to the interconnect (AISI 441 stainless) in air instead of traditional Ag CuO sealant. Elevating temperatures result in a sufficient bonding at the Ag/BZCYYb interface, and a defect-free joint is obtained at 950 °C. Atomic bonding at Ag/BZCYYb interface is confirmed by TEM. Also, a dense and thin oxide layer (2–3 μm) is formed along the AISI 441 interface. Ag particles in the interlayer provide the main driving force for the sintering joining. The massive dislocations promote the recovery and recrystallization of the Ag interlayer, as well as the interdiffusion of BZCYYb/Ag. After aging in the wet oxidizing atmosphere at 600 °C for 300 h, joints remain intact and dense, indicating superior oxidation resistance and aging performance. Besides, the joint shear strength (25.3 MPa) is 59 % higher than that of the joint brazed by traditional Ag CuO.
研究领域:
材料科学
·
固态离子学
·
能源材料
·
电化学
·
连接技术
·
高温材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 3
·5154-5160
·
IF 5.532
Xiaoyang Wang,Xiaoqing Si,Jianwei Gao,Bo Yang,Mingshen Li,Chun Li,Junlei Qi,Jian Cao
Reactive air brazing (RAB) holds great potential for joining BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) electrolytes with stainless steel interconnects. But this technique inevitably results in many brittle compounds along the BZCYYb interface and excessive oxidation at the steel interface. Herein, we successfully address the above issues by introducing the Mn–Co spinel coating. The coating prevents the reaction of Cr with the electrolyte and reduces brittle compounds along the BZCYYb interface, thereby elevating the joint strength by 31%. Also, it completely separates CuO and the stainless steel, thus inhibiting the excessive oxidation on the steel surface. Furthermore, the coating remains dense in both oxidizing and reducing atmospheres at 600 for 300 h, significantly enhancing the long-term stability of joints.
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Xiaoyang Wang,Xiaoqing Si,Chun Li,Xiajun Guo,Jian Cao
One challenge for the commercialization of protonic ceramic fuel cells (PCFCs) is the lack of sealing technology for fabricating PCFC stacks, while related studies are limited. In this study, the Ag–CuO braze is employed to successfully join the BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb) electrolyte to AISI 441 interconnect for the PCFCs. The wettability of Ag–CuO braze on the BZCYYb surface can be tailored by changing the CuO content. The influence of CuO content and brazing temperature on the joint microstructure is analyzed. Sufficient wettability of the braze and limited interfacial reaction can be achieved using Ag-2 mol % CuO at 970–1000 °C. Under this condition, a reaction layer (Cu2Yb2O5, BaCr2O4) is formed at the BZCYYb interface, and an oxide layer ((Cu, Cr, Fe)3O4, Cr2O3) is observed at the AISI 441 interface. In addition, the long-term stability of as-brazed joints is assessed by aging in both wet oxidizing (50% air–50% H2O) and reducing (4% H2–96% Ar) atmospheres for 300 h at 600 °C. After aging tests, the joints remain intact and dense, indicating that the Ag–CuO braze system is applicable for fabricating PCFC stacks.
研究领域:
材料科学
·
能源工程
·
燃料电池技术
·
陶瓷连接
·
界面化学
✓ 已验证
DOI
高影响因子
Small
·
2026
·
IF 11.8
Jialin Li,Zhongwei Yue,Zhishan Li,Yu Shen,Fang Wang,San Ping Jiang
A stable and interconnected skeleton structure is critical for the fabrication of high-performance nanocomposite cathodes by impregnation for protonic ceramic cells (PCCs). This work systematically synthesizes an interconnected BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb1711) electrolyte skeleton structure on a dense BZCYYb1711 electrolyte and introduces three catalytic active materials by nitrate impregnation: the electronic conducting La 0.8 Sr 0.2 MnO 3-δ (LSM), mixed ionic and electronic conducting La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) and triple conducting PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF). The results indicate that skeleton formation and interconnectivity are strongly associated with sintering temperature, most likely governed by the thermodynamics of densification of Ba-containing electrolyte ceramics. The electrode performance strongly correlates with the activity of the impregnated oxides. The PBSCF impregnated BZCYYb1711 (PBSCF-1711) electrode exhibits the best performance with a low R p value of 0.06 Ω cm 2 at 700°C in wet air. The fuel cell with PBSCF-1711 cathode shows a maximum power density of 486 mW cm −2 at 700°C and demonstrates excellent durability, operating stably for over 700 h in fuel cell (FC) mode and through cyclic fuel cell/electrolysis cell operation at 0.5 A cm −2 in H 2 /wet air for 100 h. This study shows the potential for the development of high-performance air electrodes on a stable and interconnected porous skeleton structure based on nitrate impregnation for PCCs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）