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
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
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
Chemistry, Physical
Depeng Zeng, Kang Xu, Feng Zhu, Yu Chen
Summary: In this study, a composite of Pr6O11 and NiO has been successfully deposited on LSCF cathode via a facile infiltration method. The modified LSCF cathode exhibits about 30% lower polarization resistance than LSCF, which is attributed to the synergistic effect of Pr6O11 and NiO on the LSCF surface. The performance enhancement is achieved by facilitating the oxygen surface adsorption-dissociation process and suppressing Sr segregation on the modified LSCF cathode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Quan Yang, Taoli Sun, Yanzhi Ding, Xiaoyong Lu, Dong Tian, Bin Lin
Summary: This study investigates the effects of K and F doping on the performance of conventional cobalt-free cathode SSF. The results show that both K and F doping significantly enhance the electrochemical performance of SSF, but co-doping leads to decreased performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Applied
Feifei Dong, Zhenghui Gao, Bingkai Zhang, Lu Li, Ziqi Kong, Zilin Ma, Meng Ni, Zhan Lin
Summary: A novel cobalt-free perovskite oxide, Ba0.75Sr0.25Fe0.875Ga0.125O3-delta (BSFG), has been developed as an efficient oxygen reduction electrode for solid oxide fuel cells (SOFCs), demonstrating exceptional electrochemical performance at 600 degrees C. The stable crystalline structure and favorable thermal expansion behavior contribute to the short-term performance stability of the cathode.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Physical
Feifei Dong, Zilin Ma, Qirui Ye, Bingkai Zhang, Lu Li, Guangming Yang, Meng Ni, Zhan Lin
Summary: This study reports a highly active and robust cobalt-free perovskite oxygen electrode, prepared by a facile co-doping strategy, for intermediate-to-low temperature SOFCs. The cathode exhibits exceptional catalytic performance and stability, suggesting an effective strategy for the development of perovskite-type cathodes for SOFCs and related applications.
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, Applied
Wei Zhang, Yun Hang Hu
Summary: This article reviews recent advances in the design and fabrication of cathodes for efficient solid oxide fuel cells (SOFCs), including engineering cathode microstructures, fabrication techniques for cathode layers, and strategies to address segregation and poisoning issues.
Article
Multidisciplinary Sciences
Tian-Wei Song, Cong Xu, Zhu-Tao Sheng, Hui-Kun Yan, Lei Tong, Jun Liu, Wei-Jie Zeng, Lu-Jie Zuo, Peng Yin, Ming Zuo, Sheng-Qi Chu, Ping Chen, Hai-Wei Liang
Summary: This study reports a small molecule-assisted impregnation approach for the general synthesis of intermetallic catalysts. The molecular additives containing heteroatoms can be converted into heteroatom-doped graphene layers during high-temperature annealing, effectively preventing alloy sintering and ensuring the formation of small-sized intermetallic catalysts.
NATURE COMMUNICATIONS
(2022)
Article
Electrochemistry
Ian A. Robinson, Yi-Lin Huang, Samuel A. Horlick, Mohammed Hussain, Alireza Pesaran, Eric D. Wachsman
Summary: By modifying the cathode surface chemistry at a relatively low temperature, the activity and durability of high-performing, low-temperature cathodes can be enhanced. This modification activates the highly defected surface and maintains the nanoscale electrocatalysts without the need for high-temperature sintering. The modified cathode exhibits significantly reduced impedance and increased stability.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Ceramics
Hyeongwon Jeong, Bharat Sharma, Seungyeon Jo, Yo Han Kim, Jae-ha Myung
Summary: The LSM-ScSZ composite electrode for SOFC cathode shows promising performance in oxygen reduction reaction. A properly controlled composition and sintering temperature improve the microstructure of the electrode, leading to reduced impedance and enhanced active surface area and connectivity. This study suggests an integrated approach in the development of SOFC cathode design using commercial materials.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jun Hyuk Kim, Seonyoung Yoo, Ryan Murphy, Yu Chen, Yong Ding, Kai Pei, Bote Zhao, Guntae Kim, YongMan Choi, Meilin Liu
Summary: This study presents a highly efficient air electrode composed of PrBa0.8Ca0.2Co2O5+delta (PBCC) backbone coated with BaCoO3-delta (BCO) nanoparticles, exhibiting remarkable electrocatalytic activity for oxygen reduction reaction and excellent tolerance to water vapor. The electrode demonstrates stable performance in wet air conditions and the correlation between surface chemistry and electrochemical behavior is essential for understanding the mechanisms of electrocatalytic processes.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
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)
Article
Chemistry, Physical
Jing Wang, Chao Cai, Yian Wang, Xuming Yang, Duojie Wu, Yuanmin Zhu, Menghao Li, Meng Gu, Minhua Shao
Summary: The electrochemical nitrate reduction reaction (NITRR) is an attractive method for ammonia synthesis. By designing ultrathin CoOx nanosheets with abundant surface oxygen as catalysts, the efficiency of NITRR can be increased, hydrogen evolution reaction can be suppressed, and the yield of ammonia can be enhanced.