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
Chemistry, Physical
Chengzhi Sun, Yu Kong, Yongchao Niu, Xiaoju Yin, Naiqing Zhang
Summary: As a classical family of high-performance cathode materials, mixed ionic and electronic conductor (MIEC) is crucial for the low-temperature operation and high efficiency of solid oxide fuel cells. While Fe-based double perovskites have advantages of low cost, good thermal compatibility with the electrolyte, and high-temperature stability, their electrochemical properties for oxygen reduction reaction are unsatisfactory. This study demonstrates that substituting Zr for Fe in NdBaFe2O6??Δ (NBF) lattice can enhance oxygen vacancy concentration and the position of O p-band center, leading to improved oxygen reduction performance for the Zr-doped NBF cathode.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Ceramics
Muhammad Yousaf, Muhammad Akbar, Enyi Hu, Yiwang Dong, Majid Niaz Akhtar, M. A. K. Yousaf Shah, Naveed Mushtaq, Yuzheng Lu, Sunlin Yan, Bin Zhu
Summary: Mixed ionic and electronic conduction in composite cathode enhances electrocatalytic functionalities for oxygen reduction reaction at low temperatures. A CoGd0.8Fe1.80O4 /Gd0.10Ce0.9O2-delta (CGFO-GDC) composite cathode demonstrates low electrode polarization resistance of 0.60 omega cm2 at 550 degrees C and peak power density of 611-343 mW cm-2 at 550-470 degrees C under fuel cell conditions. The introduction of ionic conducting GDC into CGFO sample improves catalytic functionalities and delivers a minimum electrode polarization resistance with enhanced power output at 550 degrees C.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yuan Fang, Yuhang Zhang, Xin Wu, Lixiang Jian, Jianfeng Zhu
Summary: This study aimed to develop new fabrication techniques for improving the performance of cathodes in liquid fuel cells. An integrated electrode with a sandwich-structured MnCo2O4/NC/MnO2 catalyst was prepared by in-situ growth on nickel foam. The resulting electrode showed promising results as the cathode in direct methanol fuel cells (DMFC) and direct borohydride fuel cells (DBFC), with peak power densities of 12.22 mW cm-2 and 33.65 mW cm-2, respectively. The in-situ growth of the MnCo2O4/NC/MnO2 catalyst layer exhibited superior catalytic activity compared to other catalysts. Stability tests showed excellent performance of the integrated cathode-based DBFC for approximately 350 hours. This work provides a new strategy for the preparation and optimization of fuel cell electrodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Electrochemistry
Zhiheng Li, Mengran Li, Zhonghua Zhu
Summary: Acceleration of the oxygen reduction reaction at the cathode is crucial for low-temperature solid oxide fuel cells. Understanding the interactions between surface and bulk of the cathode materials is important for electrode kinetics and overall efficacy. Future research directions include investigating the role of oxygen vacancy, rational modulation of surface-bulk interactions, and the use of advanced fabrication techniques.
ELECTROCHEMICAL ENERGY REVIEWS
(2022)
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
Bi-Lin Lai, Hai-Xia Liao, Shu-Qi Zhou, Hui-Xu Wei, Ai-Yi Li, Nan Li, Zhao-Qing Liu
Summary: This study successfully prepared a series of chalcogen-modified copper and nitrogen co-doped catalysts, which showed improved oxygen reduction reaction (ORR) performance through proper chalcogen doping while maintaining antibacterial properties. Among these catalysts, the optimized Cu2S@Cu-SNC-2 catalyst exhibited excellent durability and ORR activity, outperforming the commercial Pt/C catalyst. The MFC based on Cu2S@Cu-SNC-2 also achieved significantly higher power density and had fewer cathode biofilms.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Electrochemistry
M. A. Morales-Zapata, M. A. Laguna-Bercero
Summary: High-temperature technologies like solid oxide cells (SOC) are being used for power-to-fuel and vice versa conversion, but durability and compatibility issues at high temperatures are still being addressed. Thus, there is a growing focus on optimizing the physical, mechanical, and chemical properties of SOC materials at lower temperatures. Finding suitable air electrodes remains a significant challenge. Lanthanide nickelates with Ruddlesden-Popper (RP) and perovskite structures are emerging alternatives due to their fast ion and electron transport, as well as flexible oxygen stoichiometry. This review aims to document the research and development status of RP nickelate air electrodes and compare their electrochemical performance.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Mingrui Wei, Haizhao Li, Xiyong Chen, Guanlun Guo, Yihui Liu, Dongju Zhang
Summary: The interface formed by Pd/PdO and LSCF cathodes greatly enhances the oxygen adsorption ability of LSCF surface, leading to improved oxygen reduction activity in LSCF cathodes.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Sanaullah Qamar, Saeed Ur Rehman, Hye-Sung Kim, Hafiz Ahmad Ishfaq, Rak-Hyun Song, Tak-Hyoung Lim, Jong-Eun Hong, Seok-Joo Park, Dong-Woo Joh, Kyunghan Ahn, Seung-Bok Lee
Summary: In this study, the effect of Zn substitution on the B-site of LNF cathode materials was investigated, resulting in enhanced electrical and electrochemical properties. The experimental results show that LNFZ(3) exhibits 25.4% lower polarization resistance and 52.3% higher maximum power density at 700 degrees C compared to LNF. Additionally, LNFZ(3) demonstrates robust operation under accelerated chromium-poisoning conditions.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Juntao Gao, Qiang Li, Miaomiao Guo, Liping Sun, Lihua Huo, Hui Zhao
Summary: Developing MIEC materials with high electrocatalytic activity and stability is crucial for the success of solid oxide fuel cells (SOFCs). This study synthesized high-activity BSFO-xGDC oxygen electrodes and found that BSFO-30GDC composite cathode exhibited the best ORR activity, with a peak power density of 709 mW cm(-2) and an electrode polarization resistance of about 0.14 Omega cm(2) at 700 degrees C, making it a promising cathode catalyst for SOFCs.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Haowei Li, Jun Li, Xiaoyu Wang, Caiyue Xie, Yifei Wang, Xifeng Ding
Summary: A-type cation-deficient perovskite material has been explored as a prospective cathode for PCFCs, which can reduce polarization resistance and enhance hydration capability. This research provides an effective methodology for designing high-performance cathodes to enhance the efficiency of PCFCs.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Ceramics
Zhi Yang, Jian Zhang, Bingxue Wu, Xin Zhao, Xuanlin Lu, Yicheng Zhao, Yongdan Li
Summary: A cobalt-free composite cathode composed of La0.6Sr0.4FeO3-& delta; phase and La1.2Sr0.8NiO4+& delta; phase was synthesized using self-assembly technology. The composite cathode exhibited excellent oxygen activity, electrical conductivity, and ionic conductivity, leading to the lowest polarization resistances at 700 degrees C in oxygen and air. The one-pot synthesized nanocomposite is a promising cathode material for protonic ceramic fuel cells.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Juntao Gao, Yingying Liu, Tian Xia, Liping Sun, Hui Zhao, Bo Wei, Qiang Li
Summary: In this study, Sr0.5Bi0.4Ca0.1FeO3-delta (SBCF) and Sr0.5Bi0.5FeO3-delta (SBF) oxides were investigated as oxygen electrodes for solid oxide fuel cells (SOFCs). SBCF showed lower polarization resistance and better chemical stability, suggesting its potential as an electrode for SOFCs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Yu-Wei Cheng, Tar-Hwa Hsieh, Yu-Chang Huang, Po-Hao Tseng, Yen-Zen Wang, Ko-Shan Ho, Yue-Jie Huang
Summary: In this study, a polyazomethine gel crosslinked with Co ions was prepared from the polycondensation between p-phenylene diamine and p-terephthalaldehyde. The gel was calcined to form a Co, N-co-doped carbonaceous matrix, which acted as a cathode catalyst for an anion exchange membrane fuel cell. The Co-N-C catalyst showed a single-atom structure with active Co centers and exhibited high catalytic activity and power density.
Article
Chemistry, Physical
J. Basbus, M. Arce, H. Troiani, Q. Su, H. Wang, A. Caneiro, L. Mogni
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Inorganic & Nuclear
A. Montenegro-Hernandez, J. Vega-Castillo, A. Caneiro, L. Mogni
JOURNAL OF SOLID STATE CHEMISTRY
(2019)
Article
Chemistry, Physical
Tenglong Zhu, Horacio Troiani, Liliana V. Mogni, Mariano Santaya, Minfang Han, Scott A. Barnett
JOURNAL OF POWER SOURCES
(2019)
Article
Chemistry, Physical
Alejandra Montenegro-Hernandez, Jesus Eduardo Vega-Castillo, Alberto Caneiro, Liliana Mogni
SOLID STATE IONICS
(2020)
Article
Chemistry, Physical
D. Garces, A. G. Leyva, L. Mogni
SOLID STATE IONICS
(2020)
Article
Electrochemistry
Zulma L. Moreno Botello, Alejandra Montenegro-Hernandez, Liliana Mogni, Gilles H. Gauthier
Summary: The effect of Zr-doping on the novel SOFC cathode YMnO3 and its O-2-Reduction Reaction was studied using electrochemical impedance spectroscopy (EIS) as a function of temperature and the oxygen partial pressure. EIS technique allowed identifying three processes controlling the ORR for each electrode, differentiated by their characteristic frequency, activation energies and pO2 dependence.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Mariano Santaya, Horacio E. Troiani, Alberto Caneiro, Liliana Mogni
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Electrochemistry
J. Ascolani-Yael, A. Montenegro-Hernandez, L. C. Baque, L. M. Toscani, A. Caneiro, L. Mogni
Summary: This work presents a comparative study of diffusion and surface exchange coefficients between Co3O4 decorated LSCF electrodes and reference LSCF electrodes. The results show that the polarization resistance of Co3O4 decorated LSCF is significantly reduced compared to the reference electrode at 700°C, and the decoration modifies the surface reaction mechanism. Additionally, the diffusion coefficient remains unchanged after decoration, indicating the presence of a surface diffusion process for both electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Review
Energy & Fuels
Julian Ascolani-Yael, Alejandra Montenegro-Hernandez, Diana Garces, Quinyuan Liu, Hongqian Wang, Kyle Yakal-Kremski, Scott Barnett, Liliana Mogni
JOURNAL OF PHYSICS-ENERGY
(2020)
Article
Chemistry, Physical
Juan F. Basbus, Mauricio D. Arce, Federico R. Napolitano, Horacio E. Troiani, Jose A. Alonso, Martin E. Saleta, Miguel A. Gonzalez, Gabriel J. Cuello, Maria T. Fernandez-Diaz, Miguel Pardo Sainz, Nikolaos Bonanos, Catalina E. Jimenez, Lars Giebeler, Santiago J. A. Figueroa, Alberto Caneiro, Adriana C. Serquis, Liliana Mogni
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Electrochemistry
J. Ascolani-Yael, A. Montenegro-Hernandez, Q. Liu, S. A. Barnett, L. Mogni
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
