Article
Chemistry, Inorganic & Nuclear
Anna Niemczyk, Rotraut Merkle, Joachim Maier, Konrad Swierczek
Summary: The layered Ruddlesden-Popper oxides show potential for applications in protonic ceramic fuel cells as air electrodes. Two series of K2NiF4-type oxides were investigated, revealing different oxygen regimes for Sr- and Ba-substituted samples. Ba-substituted oxides demonstrated higher proton uptake compared to Sr-substituted oxides, with proton concentrations exceeding those of (Ba,La)FeO3-delta perovskites.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Wenjie Wang, Yitong Li, Yun Liu, Yunfeng Tian, Ben Ma, Jin Li, Jian Pu, Bo Chi
Summary: This study selected the triple conducting oxide PLNCu as the oxygen electrode for proton-conducting solid oxide electrolysis cells (H-SOECs) and demonstrated its superior thermal expansion coefficient, electrical conductivity, as well as excellent current density and polarization resistance at high temperatures through experiments.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Jiaojiao Xia, Feng Zhu, Fan He, Kang Xu, Yongman Choi, Yu Chen
Summary: A Co-doped Ruddlesden-Popper perovskite composite electrode with improved electrochemical activity was reported, showing promising performance and cycling stability after being treated with wet air at 600℃.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ce Sun, Yanpei Li, Xiaofeng Ye, Zhaoyin Wen
Summary: This research investigates the potential of using air electrode supported Ni-BCZYYC | BCZYYC | LSN-BCZYYC single cells for medium temperature applications. The results show promising current density and power density, indicating the stability and potential of this design.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Ceramics
Yifeng Zheng, Huaguo Jiang, Shun Wang, Bin Qian, Qingshan Li, Lin Ge, Han Chen
Summary: The study synthesized La1.5Sr0.5Ni1-xMnxO4+delta (LSNMx) Ruddlesden-Popper oxides and evaluated them as potential air electrodes for SOEC, finding that substituting Mn can significantly improve the electrochemical performance of the electrodes.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Zhenfei Li, Biao Yang, Bin Qian, Shun Wang, Yifeng Zheng, Lin Ge, Han Chen
Summary: Cobalt and strontium-free Ruddelesden-Popper perovskite oxides are investigated as air electrodes for reversible solid oxide cells (RSOCs). The Fe-doped Pr1.8Ba0.2Ni1-xFexO4 RP perovskite air electrode shows improved oxygen exchange and ionic diffusion, leading to reduced polarization resistance (Rp) and enhanced electrochemical performance. These findings suggest a potential application of the Fe-doped perovskite oxide as an air electrode in RSOCs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Hiroshi Yaguchi, Kotaro Fujii, Yoshinori Tsuchiya, Hiraku Ogino, Yoshihiro Tsujimoto, Masatomo Yashima
Summary: This study discovers RP oxychlorides Ba3Y2O5Cl2, Sr3Sc2O5Cl2, and Sr2ScO3Cl as a class of oxide-ion conductors. Ba3Y2O5Cl2 shows higher oxide-ion conductivity compared to Sr3Sc2O5Cl2, mainly attributed to its larger free and lattice volumes. The results suggest that RP oxychlorides are potential candidates for high oxide-ion conductivity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Jiyu Tian, Eli Zysman-Colman, Finlay D. Morrison
Summary: A family of Ruddlesden-Popper (n = 1) layered perovskite-related phases, Az(2)PbCl(x)Br(4-x) with composition 0 <= x <= 4 were obtained using mechanosynthesis. These compounds are isostructural with K2NiF4 and achieve a tunable bandgap, varying in a second-order polynomial relationship with the halide composition.
Article
Chemistry, Physical
Zhenfei Li, Pengkai Shan, Wei Tang, Qing Ni, Bin Qian, Shun Wang, Yifeng Zheng, Lin Ge, Han Chen, Caizhi Zhang
Summary: The thermal stability of Ruddlesden-Popper oxide Pr2NiO4+delta (PNO) as an air electrode in solid oxide electrolysis cells (SOECs) is poor at high temperatures (600-800 degrees C). In this study, the structural stability, electrochemical performance, and durability of PNO are improved by substituting praseodymium with barium. PBNO-x (x = 0, 0.1, 0.2, 0.3, and 0.4) samples are prepared and evaluated for high-temperature steam electrolysis in SOECs. The results show that the Ba-doped sample PBNO-0.2 has good chemical and thermal compatibility with the GDC electrolyte. Ba doping decreases the polarization resistance of the samples and improves the electrochemical performance of the PNO air electrode. PBNO-0.2 exhibits high catalytic activity and stability for high-temperature steam electrolysis in SOECs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Loreta A. Muscarella, Algirdas Ducinskas, Mathias Dankl, Michal Andrzejewski, Nicola Pietro Maria Casati, Ursula Rothlisberger, Joachim Maier, Michael Graetzel, Bruno Ehrler, Jovana Milic
Summary: Layered Dion-Jacobson (DJ) and Ruddlesden-Popper (RP) hybrid perovskites with modular structure are promising for optoelectronic applications. By using mechanical stimuli, their properties can be controlled without changing the composition. This study investigates the structure-property relationships of DJ and RP 2D perovskites under hydrostatic pressure and reveals the changes in lattice and optical properties. Surprisingly, RP and DJ perovskites behave similarly under pressure despite the different spacer molecules. The manipulation of crystal structure affects the optoelectronic properties, and the reversibility of their response expands future application prospects.
ADVANCED MATERIALS
(2022)
Article
Engineering, Chemical
Kiryl Zakharchuk, Aleksandr Bamburov, Eugene N. Naumovich, Miguel A. Vieira, Aleksey A. Yaremchenko
Summary: The study investigates the incorporation of silicon into Ruddlesden-Popper La2NiO4+delta mixed conducting ceramics to improve chemical compatibility with lanthanum silicate-based solid electrolytes. Results show that silicon additions lead to segregation of secondary phases and suppress both electrical conductivity and oxygen-ionic transport in the ceramics. The preferential reactivity of silica with lanthanum oxide suggests a potential to enhance compatibility between solid electrolytes and electrodes through surface modifications.
Article
Chemistry, Physical
Kerstin Wissel, Roland Schoch, Tobias Vogel, Manuel Donzelli, Galina Matveeva, Ute Kolb, Matthias Bauer, Peter R. Slater, Oliver Clemens
Summary: This article demonstrates the possibility of electrochemical defluorination and additional fluorination of La2NiO3F2 in all-solid-state fluoride-ion batteries. Structural changes during reduction and oxidation phases were studied using X-ray diffraction techniques, with successful synthesis of oxidized phase La2NiO3F2+x confirmed. The reversibility of structural changes, influence of different sequences of reduction and oxidation steps, and the potential of electrochemical reactions as alternative synthesis routes were highlighted. Additionally, the safe and controllable nature of electrochemical synthesis approaches for novel phases was emphasized.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Qin Cao, Ruiming Qiu, Libin Lei, Wenda Zhang, Sihao Deng, Jie Chen, Lunhua He, Jungu Xu
Summary: The alkaline-earth-metal-doped La2BaIn2O7 materials showed improved oxide ion conductivity, while the proton conductivity remained limited. The defect formation and oxygen vacancy migration mechanisms in La2BaIn2O7-based materials were studied through calculations and simulations.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Aleksandr Bamburov, Yevgeniy Naumovich, Dmitry D. Khalyavin, Aleksey A. Yaremchenko
Summary: This study investigated the possibility of introducing cation vacancies into the Ln sublattice of perovskite-related Ruddlesden-Popper nickelates. The results showed that the concentration of cation vacancies in the A sublattice of the Ruddlesden-Popper structure is very low, and the introduction of vacancies enhances the diffusivity of A-site cations and destabilizes the structure. However, the nominal cation deficiency has no effect on the electrical conductivity and oxygen permeability of the ceramics.
CHEMISTRY OF MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Daoming Huan, Lu Zhang, Kang Zhu, Xinyu Li, Ranran Peng, Dong Ding, Changrong Xia
Summary: This study observes the interstitial fluorine anion-doping in Sr3Fe2O7-delta for the first time, and demonstrates the impact of fluorine anion-doping on the local coordination environment of oxygen electrodes, as well as its effect on the activation of oxygen ions. Density functional theory calculations verify the insertion of fluorine anions into tetrahedral intervals and the alteration of ion proportion in the tetrahedra. The fluorine anion-doped oxygen electrode exhibits improved performance and higher peak power density within the temperature range.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
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
Nanoscience & Nanotechnology
Binze Zhang, Shaowei Zhang, Hairui Han, Kaibin Tang, Changrong Xia
Summary: The partial replacement of iron element with gallium in PrBaFe2O5+delta can improve its electrochemical performance as a cathode material for intermediate-temperature solid oxide fuel cells. Specifically, PrBaFe1.9Ga0.1O5+delta exhibits improved physicochemical properties and electrochemical properties, such as an increased oxygen surface exchange coefficient (kchem) and enhanced oxygen dissociation process. Moreover, the anode-supported single cell with PBFG0.1 cathode shows a higher peak power density and good stability in long-term operation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
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
Chemistry, Physical
Binze Zhang, Shaowei Zhang, Zhen Zhang, Kaibin Tang, Changrong Xia
Summary: A highly efficient and robust metal-supported solid oxide electrolysis cell (SOEC) is developed, which exhibits redox stability, minimal ohmic loss, high conductivity, enlarged specific surface area, and enhanced CO2 adsorption property. The metal-supported SOEC with the infiltrated cathode shows excellent current densities and stability, making it a promising configuration for direct CO2 electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Hairui Han, Xueyu Hu, Binze Zhang, Shaowei Zhang, Yanxiang Zhang, Changrong Xia
Summary: A method was proposed to determine the chemical surface exchange coefficient (k(chem)) and reveal the ORR process of porous dual-phase composites based on electrical conductivity relaxation measurements and the distribution of characteristic time (DCT) model. The method was demonstrated with porous LSCF-SDC composites, and it was found that the ORR process involved a combination of gas diffusion, surface exchange, and their interaction. The addition of SDC greatly improved k(chem) in the dual-phase composites, with the highest improvement achieved at around 10% SDC volume fraction. The method is also applicable for analyzing CO2 reduction and vapor splitting reactions in solid oxide electrolysis cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Rui Song, Xiaoyu Zhang, Daoming Huan, Xinyu Li, Nai Shi, Changrong Xia, Ranran Peng, Yalin Lu
Summary: The slow kinetics of cathodic oxygen reduction reaction is a key barrier to the development of protonic ceramic fuel cells (PCFCs), but the recent discovery of triple-conductive materials has opened up new possibilities for their commercialization. In this study, a highly efficient and stable cathode material called BCFZSc is proposed for PCFCs. Experimental results show that BCFZSc has excellent hydration ability and water tolerance, and it exhibits a significantly higher oxygen surface exchange coefficient compared to most reported cathodes. Using BCFZSc as cathode, single cell achieves excellent peak power density and durability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(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
Engineering, Environmental
Yongtao Zhao, Shaowei Zhang, Mingchao Su, Daoming Huan, Ranran Peng, Changrong Xia
Summary: In this study, a stoichiometric CuFe2 alloy was successfully electroplated on the surface of SUS 430, forming a CuFe2O4 spinel coating through in-situ thermal oxidation. The mechanism of CuFe2 alloy electroplating was revealed using density functional theory calculations and COMSOL simulations. The dense CuFe2O4 coating effectively blocked the outward volatile Cr species and suppressed the increase in area specific resistance (ASR) in long-term testing. The practical application of CuFe2O4-coated SUS 430 showed improved durability due to mitigated chromium poisoning.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Xiaoye Liu, Xiangkun Kong, Wenyi Xiang, Yining Jiang, Bingqinq Xiong, Weiwei Ping, Changrong Xia, Daoming Huan, Chengwei Wang
Summary: In this study, a new garnet-type composite solid-state electrolyte (LLBZNO-LCO) was proposed to improve the chemical stability and electrochemical properties of garnet with high-temperature processing. The addition of a small amount of LCO significantly decreased the interface resistance and reduced the sintering temperature of garnet-type LLBZNO. The all-solid-state battery based on the sintered LLBZNO-LCO SSE showed excellent cycling stability. This approach provides a new strategy for optimizing the comprehensive performance of garnet SSE.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Xinyu Li, Zemin Chen, Daoming Huan, Bingbing Qiu, Kang Zhu, Zeming Qi, Hengjie Liu, Changrong Xia, Ranran Peng, Yalin Lu
Summary: This study demonstrates the successful modification of proton-conducting solid oxide fuel cell (PCFC) cathode surfaces using boron (B), leading to improved CO2 resistance and surface electrocatalytic activity for proton-involved oxygen reduction reaction (P-ORR). The introduction of B raises the surface Bronsted acid (-OH) concentration while suppressing the surface Lewis acidity, ultimately enhancing the power density of the PCFC.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Lujuan Ye, Kang Zhu, Yunan Jiang, Shaowei Zhang, Ranran Peng, Changrong Xia
Summary: Solid oxide electrolysis cells (SOECs) can efficiently convert CO2 into valuable chemicals. Ceria with exsolved Fe nanoparticles on its surface shows enhanced electrochemical performance for CO2 reduction reaction (CO2RR).
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hairui Han, Yunan Jiang, Shaowei Zhang, Changrong Xia
Summary: This perspective paper estimates the possible physiochemical processes for the oxygen reduction reaction (ORR) in porous mixed ionic-electronic conductors (MIECs) by comparing the oxygen supply/consumption fluxes through calculation. It also discusses the potential problems associated with different characterization techniques and reveals the significant delay in the ORR process caused by gas diffusion. The aim of this paper is to recommend a reasonable method to characterize the true ORR kinetics of porous electrodes and quantify the effect of gas diffusion.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)