Article
Chemistry, Physical
Na Li, Liping Sun, Qiang Li, Tian Xia, Lihua Huo, Hui Zhao
Summary: The spinel oxide CuBi2O4 (CBO) is prepared and characterized as a cathode material for intermediate temperature solid oxide fuel cells (IT-SOFCs). CBO shows better oxygen transport properties and lower polarization resistance values compared to traditional cathodes like LSM and LSCF. By forming a composite cathode with GDC, the polarization resistance of CBO can be further reduced, demonstrating its viability as a cathode material for IT-SOFC.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Ben Ma, Zhaohui Chen, Zhuang Lin, Lin Cheng, Yingke Zhou
Summary: This study investigates the effects of Mg doping on the performance of Mn-Cr spinel oxide cathodes in solid oxide fuel cells (SOFCs). Both experimental results and density functional theory (DFT) calculations show that Mg doping can optimize the electronic structure of the spinel oxide, increase the oxygen vacancy concentration, and improve the electrical conductivity and catalytic activity. The Mg-doped Mn-Cr spinel oxide cathode exhibits superior performance with high area-specific polarization resistance and maximum power density.
JOURNAL OF POWER SOURCES
(2023)
Article
Engineering, Environmental
Fulan Zhong, Zhiyu Li, Yu Luo, Chongqi Chen, Chen Zhou, Li Lin, Guohui Cai, Chaktong Au, Lilong Jiang
Summary: A complex spinel oxide catalyst was prepared to enhance the oxygen reduction reaction in intermediate-temperature solid oxide fuel cells (IT-SOFCs). The introduction of Ni doping optimized the oxidation states of Fe and Co ions, improving small polaron hopping and enhancing electrical conductivity. The electrochemical performance of the NFCO2-based IT-SOFCs outperformed other reported SOFCs with cathodes, achieving a high power density of 1.93 W/cm(2) at 800 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Yuanchen Duan, Baohua Cao, Shiqing Li, Anqi Wu, Zhangfa Huang, Jianxin Wang, Qin Wang, Jun Yang, Wanbing Guan, Xiaopeng Qi
Summary: A spinel-structured solid oxide fuel cell cathode, CuMn1.5Ni0.5O4 (CMN), with high conductivity and good catalytic activity, has been proposed in this study. The performance test results of the CMN-GDC composite cathode show low resistance and high power density.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Sara Paydar, Kuno Kooser, Priit Moller, Olga Volobujeva, Sari Granroth, Enn Lust, Gunnar Nurk
Summary: Development of active ceramic hydrogen electrodes with high stability is crucial for the advancement of solid oxide fuel cells (SOFC). In this study, a series of cubic perovskite-type La/Ca/Fe-doped strontium titanates (LSCTF) were synthesized and evaluated for their crystallographic and electrical properties, catalytic activity, stability, and performance as fuel electrodes in SOFC. The results showed that LSCTF materials behave like semiconductors, and the conductivity, catalytic activity, and stability of the electrodes are significantly influenced by the Ca concentration in the A-site. The optimal composition of La0.2Sr0.35Ca0.35Ti0.95Fe0.05O3-delta fuel electrode exhibited a low polarization resistance value and the fuel cell with a 50 wt % La0.2Sr0.35Ca0.35Ti0.95Fe0.05O3-delta + 50 wt % Ce0.9Gd0.1O2-delta anode demonstrated high power density.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Fangfang Wang, QuanSen Yang, Huining Wang, Zixin Zhang, Manuel E. Brito
Summary: The study revealed that sulfur poisoning can occur in cathode materials even without alkali earth components. Sulfur readily reacts with La2O3 in the cathode material to form La2O2SO4 at different temperatures, highlighting the temperature dependency of the chemical reaction. This prompts the exploration of new materials and strategies for developing cathode materials with high sulfur tolerance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Hua Tong, Wenjing Hu, Min Fu, Chunli Yang, Zetian Tao
Summary: Nickel-doped barium ferrate with triple conducting ability is developed as cathodes for proton-conducting solid oxide fuel cells (H-SOFCs), showing impressive electrochemical performance at intermediate temperatures. The high electrocatalytic capacity of the nickel-doped barium ferrate cathode is attributed to its significant proton conductivity, which is enhanced by the presence of nickel and the regulated composition and structure of the composite cathode.
Article
Chemistry, Physical
Fuyao Yan, Mufu Yan, Yanxiang Zhang
Summary: The electrical conductivity relaxation method is widely used in solid oxide fuel cell materials to measure the kinetic properties of species transport process using rectangular dense samples. It has been found that the equation of ECR used in some studies is flawed, and an improved equation is presented in this communication.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Xuan Yang, Yangsen Xu, Shoufu Yu, Lei Bi
Summary: A new spinel oxide CFLO has been synthesized and used as a cathode material for proton-conducting solid oxide fuel cells. The doping of Li significantly regulates the electronic structure and creates more oxygen vacancies, improving the cathode performance. The CFLO cathode shows superior performance and long-term stability in various testing temperatures, making it a promising material for H-SOFCs.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Zhuang Lin, Ben Ma, Zhaohui Chen, Yingke Zhou
Summary: Commercial use of solid oxide fuel cells (SOFCs) requires high output performance and excellent long-term stability. In this study, a nanostructured spinel high-entropy oxide (Fe0.2Mn0.2Co0.2Ni0.2Zn0.2)3O4 (FMCNZ) was developed as the SOFC cathode using an impregnation method. The FMCNZ cathode showed higher oxygen reduction reaction (ORR) performance compared to traditional spinel cathodes, attributed to the diversity of surface metal cations and the increase of surface oxygen vacancies brought on by the high entropy design. The nanostructured FMCNZ cathode exhibited stable performance after 100 hours of cell operation, providing a promising path for developing high-performance cathodes.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Ziye Zhang, Deti Xie, Jiupai Ni, Chengsheng Ni
Summary: BYC is a prototypical superconducting oxide with a superior mixed electronic and ionic conductivity, and Fe doping can enhance its electrochemical performance and power output.
CERAMICS INTERNATIONAL
(2021)
Review
Materials Science, Ceramics
Anjana P. Anantharaman, Hari Prasad Dasari
Summary: Pyrochlore structure materials have unique crystal structure, electrical properties, and thermal stability, making them widely applicable in catalysis, nuclear waste encapsulation, sensors, and electronic devices. The ionic/electronic conductivity of these materials is crucial for their performance in solid oxide fuel cells, where factors like cation radius ratio, oxygen migration, vacancy formation, and dopant addition play significant roles in enhancing the conductivity. Research has shown that controlling these factors can improve the ion and electron transport properties of pyrochlore materials, ultimately leading to better performance in various applications.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Hongxia Gu, Meigui Xu, Yufei Song, Chuan Zhou, Chao Su, Wei Wang, Ran Ran, Wei Zhou, Zongping Shao
Summary: A new perovskite SrCo0.8Ti0.1Ta0.1O3-delta (SCTT) with high electrical conductivities, appropriate oxygen vacancy concentrations, and high bulk diffusion capability has been developed, showing favorable oxygen reduction reaction (ORR) activity at intermediate temperatures. The SCTT material exhibits high peak power density and durability in solid oxide fuel cells and protonic ceramic fuel cells, potentially accelerating the commercialization of IT-SOFC technology.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Muhammad Rafaqat, Ghulam Ali, Naveed Ahmad, Syed Hassan Mujtaba Jafri, Shahid Atiq, Ghulam Abbas, Ghulam M. Mustafa, Rizwan Raza
Summary: This study reports the synthesis of La and Ba substituted X0.5Sr0.5Co0.8Mn0.2O3 and their investigation as a low temperature solid oxide fuel cell. The results show that the fuel cell based on LSCM cathode has significantly higher values of power density and open circuit voltage (VOC), indicating its potential for future applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Elena Pikalova, Alexander Kolchugin, Kiryl Zakharchuk, Dziyana Boiba, Viktor Tsvinkinberg, Elena Filonova, Anton Khrustov, Aleksey Yaremchenko
Summary: The Ruddlesden-Popper La2-xGdxNiO4+delta nickelates were synthesized as potential oxygen electrode materials for solid oxide fuel/electrolysis cells. They showed high p-type electronic conductivity between 500-800 degrees C. Substitution by gadolinium did not change the oxygen content in air, but had a negative impact on the mobility of oxygen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Haoliang Huang, Zezhi Chen, Liang Xie, Jianlin Wang, Ranran Peng, Zhengping Fu, Yalin Lu
Summary: The oxygen octahedron/tetrahedron connectivity in transition metal oxides plays a critical role in modulating their physical properties. By doping Nd into SrCoO3-delta, the crystal structure transitioned from face-shared octahedron to corner-shared octahedron/tetrahedron, leading to improved ferromagnetic behavior. Nd-doping mainly affects the electronic structure of oxygen, altering the magnetic interactions in the material.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Electrochemistry
Yuling Xia, Kaili Guo, Bobing Hu, Ranran Peng, Changrong Xia
Summary: Gold is commonly believed to be inert for electrochemical reactions in SOFCs, but research shows that it is active for the oxygen reduction reaction via LSCF, greatly increasing the ORR rate and improving the chemical oxygen surface exchange coefficient. Smaller gold particles demonstrate better performance in enhancing the ORR activity.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Electrochemistry
Yi Yang, Nai Shi, Yun Xie, Xinyu Li, Xueyu Hu, Kang Zhu, Daoming Huan, Ranran Peng, Changrong Xia, Yalin Lu
Summary: The study demonstrates that K doping can improve the reaction kinetics of Sr2Fe1.5Mo0.5O6-delta air electrode, enhancing the electrochemical performance of P-SOCs. Compared to undoped electrodes, using K-doped electrodes can achieve improvement factors of 53.3% and 93.4% in FC and EC modes respectively, providing a rational approach to design new air electrodes for P-SOCs.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Ceramics
Jun Huang, Haowen Tang, Zezhi Chen, Huan Liu, Jianlin Wang, Shuai Huang, Jiwen Yang, Zhengping Fu, Ranran Peng, Yalin Lu
Summary: Through the preparation of a series of SrCo1-xFexO2.9-delta F0.1 (x = 0, 0.1, 0.2, and 0.3) perovskites, it was found that the ferromagnetism of Fe-doped samples is influenced by Fe4+-O-Co3+, Fe3+-O-Fe3+, and Fe4+-O-Fe4+ interactions, leading to a decrease in the magnetic transition temperature, while the resistivity data can be better fitted using Mott's variable range hopping (VRH) model, implying its disordering semiconducting behavior.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Mingchao Su, Daoming Huan, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia
Summary: The study demonstrates that Ca-doped LaCoO3-delta and LaCoO3-delta oxides can effectively overcome CO2 poisoning issues, showing high electrical conductivity and thermal compatibility. Compared to LCCo, LCFe exhibits better CO2 tolerance and higher electrochemical performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Yanhong Wan, Yi Yang, Yalin Lu, Ranran Peng, Changrong Xia
Summary: This study found that doping bismuth into lanthanum chromate-based perovskites can significantly enhance the electrochemical activity for CO2 reduction reaction and improve the physicochemical properties, leading to a substantial improvement in the performance of symmetrical solid oxide electrolysis cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Lu Zhang, Daoming Huan, Kang Zhu, Pengqi Dai, Ranran Peng, Changrong Xia
Summary: Doping of Mn in SrFeO(3-delta) perovskites can regulate their phase structure, enhance cathode performance, and improve stability in CO2 atmospheres.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Daoming Huan, Lu Zhang, Kang Zhu, Xinyu Li, Binze Zhang, Jialin Shi, Ranran Peng, Changrong Xia
Summary: This study reports the stabilization of SrFeO3-delta perovskite in a cubic structure by doping aluminum cations in the B-site, which greatly improves its electrocatalytic activity for oxygen reduction reaction and CO2 tolerance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Shuai Huang, Kang Zhu, Jun Huang, Jiwen Yang, Jianlin Wang, Zhengping Fu, Ranran Peng, Yalin Lu
Summary: In this study, a superstructure oxide Sr4Fe5CoO13-delta was successfully prepared via combustion method. The Co dopant improved the amount of oxygen vacancies in the oxide. Unlike other oxides, Sr4Fe5CoO13-delta showed localized electrical behavior at low temperatures and exhibited ferromagnetic property with a high Curie temperature. Therefore, this oxide has a broadened working temperature range and may contribute to the exploration of high temperature spintronic devices.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Zongzi Jin, Nai Shi, Ranran Peng, Zhenbin Wang, Chengwei Wang, Yalin Lu, Wei Liu
Summary: This study proposes an efficient method to theoretically predict the hydration enthalpies of MPECs and identifies the volume per atom as the decisive factor of hydration enthalpies. This finding provides new insights for the rational design of novel MPECs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Xinyu Li, Zemin Chen, Yi Yang, Daoming Huan, Hui Su, Kang Zhu, Nai Shi, Zeming Qi, Xusheng Zheng, Haibin Pan, Zhongliang Zhan, Changrong Xia, Ranran Peng, Shiqiang Wei, Yalin Lu
Summary: This study proposed a single-atom customizing strategy to create a thermally stable and highly active single-atom catalyst, bridging the application gap between SACs and R-PSOCs and providing new possibilities for industrial applications.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Xiaoyu Zhang, Rui Song, Daoming Huan, Kang Zhu, Xinyu Li, Hairui Han, Changrong Xia, Ranran Peng, Yalin Lu
Summary: A highly efficient strategy to construct a triple-conductive region through surface self-assembly protonation has been proposed, which improves the electrochemical performance and durability of protonic ceramic fuel cells.
Article
Materials Science, Ceramics
Nanqi Gong, Jianlin Wang, Shuai Huang, Liangbing Ge, Zheling Shan, Jian Zhang, Haoliang Huang, Ranran Peng, Zhengping Fu, Yalin Lu
Summary: In this study, high-quality Sr4Fe6O13 epitaxial films were successfully synthesized by investigating the growth conditions. The competition between Sr4Fe6O13 and SrFeO2.5 in terms of Gibbs free energies was revealed through experiments and density functional theory calculations. The results of this study are important for the development of other films with similar layered superlattice structures and the investigation of their intrinsic properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Kang Zhu, Nai Shi, Lijie Zhang, Daoming Huan, Xinyu Li, Xiaoyu Zhang, Rui Song, Changrong Xia, Ranran Peng, Yalin Lu
Summary: Oxygen vacancy engineering via calcium-doping is proposed and validated to improve proton conduction in proton conducting oxides. The presence of more oxygen vacancies and the tailored position of vacancies accelerate proton diffusion and increase proton concentration. The doped compound BZCa1Y2 exhibits higher proton concentration, ionic conductivity, and proton diffusion coefficient compared to BZY2.
CERAMICS INTERNATIONAL
(2023)
Article
Electrochemistry
Yun Xie, Nai Shi, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia, Ming Chen
Summary: This study demonstrates that the novel electrochemical catalyst improves the stability and electrochemical performance of R-PCCs. The enhanced stability and performance of the air electrode catalyst may be attributed to the higher electronegativity of La, which reduces basicity and improves chemical stability in acidic atmospheres; the smaller ionic radius of La, which alleviates lattice distortion; and the stronger interaction between La and lattice oxygen, inhibiting structural degradation caused by Sr segregation.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)