Article
Chemistry, Physical
Zhaoyu Zhong, Xiaoqian Xu, Zhenhao Zhang, Jiao Li, Xue Guo, Shigang Wu, Haibin Sun
Summary: This study successfully fabricated dense BZCYYb electrolytes at low temperatures using microwave sintering technique, effectively suppressing barium evaporation and promoting grain growth, leading to improved electrical conductivity. The microwave-sintered BZCYYb electrolyte exhibited excellent conductivity at 700 degrees C, indicating its potential application in SOFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Lele Wang, Yueyuan Gu, Hailu Dai, Yanru Yin, Lei Bi
Summary: BaSrInFeO5 (BSIF) is a new cathode material designed for proton-conducting solid oxide fuel cells (SOFCs) by modifying the Ba2In2O5 proton conductor with Sr and Fe cations. Sr doping improves the chemical stability, formation of oxygen vacancies, and proton mobility of the material. Experimental studies and first-principles calculations demonstrate that an H-SOFC using the BSIF cathode achieves a high peak power density of 1192 mW cm-2 at 700 oC, surpassing previous reports. This study suggests that derived cathode materials from less-studied Ba2In2O5 could offer new material selections for H-SOFCs.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Katsuya Akimoto, Ning Wang, Chunmei Tang, Kai Shuto, SeongWoo Jeong, Sho Kitano, Hiroki Habazaki, Yoshitaka Aoki
Summary: This study found that adding functional layers between the electrolyte and cathode in solid oxide fuel cells can significantly reduce the cathodic reaction resistance. By using a functional layer, the cathode reaction area can be increased and the resistance can be decreased, resulting in higher power densities for the cells.
ACS APPLIED ENERGY MATERIALS
(2022)
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
Materials Science, Ceramics
Keyou Shi, Yanru Yin, Zengming Tang, Shoufu Yu, Qiucai Zhang
Summary: A slight deficiency of Ba in BaCoO3 improves its chemical stability, protonation, and surface catalytic activity, resulting in enhanced fuel cell performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yufeng Li, Shoufu Yu, Hailu Dai, Yangsen Xu, Lei Bi
Summary: In this study, Sr-doped LaMnO3 (LSM) is coated with TiO2 to create the LSM + TiO2 cathode. It is found that TiO2 modifies the electronic structure at the LSM/TiO2 interface, allowing for charge accumulation and enhanced oxygen diffusion ability. Using LSM + TiO2 as a cathode for proton-conducting SOFCs operating at intermediate temperatures, the fuel cell demonstrates enhanced cell output performance and achieves the highest reported value for H-SOFCs with LSM cathodes.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xuan Yang, Yanru Yin, Shoufu Yu, Lei Bi
Summary: The BSCF+Co3O4 composite material is found to be a promising cathode for H-SOFCs, offering a solution to the thermal mismatch problem between the cathode and electrolyte. The addition of Co3O4 enhances the contact between the BSCF cathode and the electrolyte and also improves the catalytic activity of the cathode, resulting in significantly improved performance for H-SOFCs.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Donglin Han, Xin Liu, Tor Svendsen Bjorheim, Tetsuya Uda
Summary: Increasing Ce content in Y-doped BaZrO3, BaCeO3, and their solid solutions stabilizes protons, increases oxide ion conductivity, and decreases hole conduction, thereby enhancing the ionic conduction of BZCY20 for improved performance in fuel cells and electrolysis cells.
ADVANCED ENERGY MATERIALS
(2021)
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)
Article
Chemistry, Physical
Shuai Wu, Yinhua Liu, Chao Wang, Hailu Dai, Xianfen Wang, Lei Bi
Summary: The performance of LaNi0.5Fe0.5O3-delta material for H-SOFCs has been improved through a Zn-doping strategy, resulting in higher peak power density and lower polarization resistance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Xiuqing Lv, Huili Chen, Wei Zhou, Si-Dian Li, Fangqin Cheng, Zongping Shao
Summary: In this study, the issue of CO2 poisoning in SrCoO3-delta 5-based materials was addressed by co-doping iron, zirconium, and yttrium. The newly formed material, SCFZY, exhibited significant CO2-tolerance as a cathode for solid oxide fuel cells (SOFCs), along with high power density and good durability.
Article
Materials Science, Ceramics
Yangsen Xu, Shoufu Yu, Yanru Yin, Lei Bi
Summary: LiCoO2, a material widely used in Li-ion batteries, was found to be suitable as a cathode material for H-SOFCs. The evaporation of Li in LiCoO2 led to the in-situ formation of a LiCoO2+Co3O4 composite, which greatly enhanced the performance of the cathode in H-SOFCs. The formation of Co3O4 due to Li-evaporation decreased the formation energy of oxygen vacancies, resulting in improved cathode performance.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Ceramics
Rui Zhou, Yueyuan Gu, Hailu Dai, Yangsen Xu, Lei Bi
Summary: By synthesizing nominal PrxSr0.5MnO3-d materials, new Pr0.5Sr0.5MnO3-d (PSM50)+ PrO2_(x) composite cathodes for proton-conducting solid oxide fuel cells (SOFCs) were developed. The exsolution of PrO2_(x) particles was observed, increasing with the amount of Pr in PrxSr0.5MnO3-d. A Pr0.7Sr0.5MnO3-d (PSM70) cathode enabled the highest fuel cell output reported for H-SOFCs with manganate cathodes. The construction of a PSM50/PrO2 heterostructure interface accelerated the cathode oxygen reduction reaction (ORR) kinetics and demonstrated excellent electrochemical performance and chemical stability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Xi Xu, Yangsen Xu, Jinming Ma, Yanru Yin, Marco Fronzi, Xianfen Wang, Lei Bi
Summary: The study demonstrates that tailoring the electronic structure of perovskite oxide with Mo-doping leads to improvements in cathode materials for proton-conducting solid oxide fuel cells. The Mo-doping changes the electronic structure of the oxide, making the metal-oxygen bond less strong and the surface more active towards oxygen reduction, resulting in more feasible oxygen vacancy formation critical for protonation. The electric field induced by Mo-doping provides an additional driving force for proton movement, accelerating proton migration in the oxide and improving cathode performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Rajendra S. Negi, Philip Minnmann, Ruijun Pan, Shamail Ahmed, Marcel J. Herzog, Kerstin Volz, Ryo Takata, Franz Schmidt, Juergen Janek, Matthias T. Elm
Summary: In this study, a dry-coating process using fumed lithium titanate (LTO) powder-based coating on Ni-rich oxide-based cathode active material (CAM) was applied to thiophosphate-based all-solid-state batteries (ASSBs) for the first time, resulting in significantly improved C-rate performance and long-term cycling stability. The enhanced electrochemical performance is attributed to reduced interfacial resistance between the coated cathode and solid electrolyte, as confirmed by in-depth electrochemical impedance spectroscopy analysis.
CHEMISTRY OF MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Nai Shi, Yun Xie, Yi Yang, Daoming Huan, Yang Pan, Ranran Peng, Changrong Xia, Chusheng Chen, Zhongliang Zhan, Yalin Lu
Summary: This study successfully addresses the challenges encountered in the direct utilization of methane in solid oxide fuel cells through the improvement of anode materials and catalysts, achieving excellent performance.
ACS APPLIED MATERIALS & INTERFACES
(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
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)
Article
Chemistry, Physical
Daoming Huan, Lu Zhang, Shaowei Zhang, Nai Shi, Xinyu Li, Kang Zhu, Changrong Xia, Ranran Peng, Yalin Lu
Summary: The utilization of CO2 has become a worldwide pressing issue. Solid oxide electrolysis cells (SOECs) have gained special attention due to their high energy conversion efficiency and potential in carbon cycling. Symmetrical SOECs using the same oxide materials for both the cathode and anode offer advantages such as simplified fabrication procedures, reduced costs, and minimized compatibility issues.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)