Article
Materials Science, Ceramics
Jinghe Bai, Defeng Zhou, Xiaofei Zhu, Ning Wang, Qingwen Liang, Ruyi Chen, Hongyan Lu, Jinmeng Li, Wenfu Yan
Summary: In this paper, the ORR activity of the Co-free SOFC cathode material is effectively increased by doping low-valence Ln(3+) ions at the B-site of Fe-based perovskite BSF. The doped BSFN shows improved oxygen exchange and diffusion rate, resulting in lower resistance and higher power density compared to BSF. The BSFN-based single cell also exhibits better long-term stability due to its lower thermal expansion coefficient.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Applied
Qi Wang, Hui Fan, Yanfei Xiao, Yihe Zhang
Summary: Solid oxide fuel cells (SOFCs) are all-solid energy conversion devices that convert the chemical energy of fuels into electric energy at intermediate and high temperatures. Rare earth elements play an indispensable role in different components of SOFCs, and the structures and properties of materials are influenced by element type, valence, coordination, and ion radius.
JOURNAL OF RARE EARTHS
(2022)
Article
Electrochemistry
Juntao Gao, Qiang Li, Zhiping Zhang, Zhe Lu, Bo Wei
Summary: BSFP oxide, as a cathode material for SOFC, shows excellent chemical compatibility and low polarization resistance, suggesting its promising application in SOFC operation at intermediate temperatures.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Xin Cao, Haifeng Li, Yu Qiao, Ping He, Yumin Qian, Xiyan Yue, Min Jia, Jordi Cabana, Haoshen Zhou
Summary: The combination of anionic and cationic activities in Li-rich materials has achieved high-energy-density batteries by breaking through the traditional capacity limitation. However, the utilization of anionic oxygen redox reactions often leads to detrimental lattice oxygen release, which accelerates structural distortion and electrochemical performance deterioration. This study found that the introduction of Mn vacancy enables reversible oxygen redox behaviors within layered Li-4/7[square Mn-1/7(6/7)]O-2 with Li-O-vacancy configuration, effectively suppressing lattice oxygen loss and improving the output capacity and long-term cycling stability of batteries.
Article
Energy & Fuels
Jiaming Yang, Junkai Wang, Lei Fu, Ke Wu, Zhengrong Liu, Kai Wu, Jun Zhou
Summary: The fiber-structured YCF-GDC composite oxide synthesized through modified electrospinning technique shows promising features as a highly active cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs) with relatively low resistance at 550 degrees C, offering potential for future applications.
Article
Thermodynamics
Juntao Gao, Dan Ma, Hui Zhao, Qiang Li, Zhe Lu, Bo Wei
Summary: Fe-based pervoskite oxides Bi0.5Sr0.5Fe1_xZrxO3_delta (BSFZx, x = 0, 0.05, 0.10 and 0.15) doped with cation Zr were synthesized and investigated as cathodes for SOFCs. The BSFZ0.10 cathode exhibited the lowest Rp values and the highest electrocatalytic performance, making it a promising candidate for oxygen-conducting SOFCs.
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
Wenwen Deng, Weibo Shi, Shuchan Wang, Zehua Yan, Zhen Rui, Qingling Wang, Chang Ming Li
Summary: In this study, a polypropylene separator was innovatively used as a substrate to form a sandwich-like solid polymer electrolyte (SPE) coated with PEO-LiTFSI-SN paste. The SPE exhibited high conductivity at both room temperature and low temperature, and the PTO||SPE||Li battery demonstrated excellent discharge performance and cycling stability at low temperature, paving a new way for the development of low-temperature solid-state organic batteries (SSOBs).
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Bo Liu, Na Li, Liping Sun, Qiang Li, Lihua Huo, Zhao Hui
Summary: Doped rare earth elements significantly influence the properties of Nd(1.9)Ln(0.1)CuO(4), with Nd1.9Ce0.1CuO4 showing the highest performance in terms of surface oxygen adsorption, DC conductivity, and electrocatalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Shuai Wu, Xi Xu, Xiaomei Li, Lei Bi
Summary: The Sr and Zn co-doped LaMnO3 (LSMZ) cathode demonstrates superior performance and stability in proton-conducting solid oxide fuel cells (H-SOFCs), outperforming all reported LSM-based H-SOFCs; LSMZ is stable against CO2 and exhibits good long-term stability, paving a new way for research on intermediate temperature SOFC cathodes.
SCIENCE CHINA-MATERIALS
(2022)
Article
Materials Science, Ceramics
Jinghe Bai, Defeng Zhou, Xiaofei Zhu, Ning Wang, Ruyi Chen, Bolin Wang, Wenfu Yan
Summary: This paper investigates the effect of A-site non-stoichiometry on the electrochemical performance of (LS)(1-x)CFs (x =-0.05, 0, 0.05, 0.10, 0.15) from the aspect of microstructure/elemental surface chemical environment evolution. The results show that (LS)(0.90)CF has the best ORR activity and the highest electrochemical performance. The excellent electrochemical performance is attributed to the (LS)(0.90)CF/Co2FeO4/CoFe2O4-type heterostructure formed by in-situ segregation induced by A-site defects, which improves the surface oxygen diffusion coefficient and chemical bulk diffusion coefficient of the cathode.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Chengyi Ai, Tingting Li, Rongzheng Ren, Zhenhua Wang, Wang Sun, Jinsheng Feng, Kening Sun, Jinshuo Qiao
Summary: The novel proton conducting solid oxide fuel cell (H-SOFC) shows good oxygen reduction reaction activity and enhanced electrochemical performance through the investigation of the K2NiF4-type cathode material Pr2-xBaxNi0.6Cu0.4O4+delta, with increased electrical conductivity, oxygen vacancy concentration and proton conductivity, achieving a high peak power density at 750 degrees Celsius.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Dong Xu, Xingkai Zhou, Yu Li, Xiaole Yu, Zhexiang Yu, Bochang Shi, Yaowei Mi, Bangze Wu, Lin Ge
Summary: This work investigates the sintering properties, thermal expansion coefficient, and chemical stability of hexagonal perovskite-related oxides Ba7Ta3.7Mo1.3O20.15 (BTM). The study also evaluates the chemical compatibility between BTM electrolyte and various electrode materials. The results show that BTM reacts highly with Ni, Co, Fe, Mn, Pr, Sr, and La elements in the electrodes, leading to the formation of resistive phases and deterioration of electrochemical properties.
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
Chemistry, Physical
Yuan Gao, Xiqiang Huang, Zhe Wang, Mengke Yuan, Juntao Gao, Zhe Lv, Lingling Xu, Bo Wei
Summary: This study evaluates the electrochemical performance of SCT10 cathodes in the presence of Cr impurities. The results demonstrate that Cr impurities lead to significant performance degradation, especially in wet conditions. Morphological damages and the formation of SrCrO4 and Co3O4 secondary phases on the cathode surface contribute to the deterioration of oxygen reduction kinetics and cathode activity. The study highlights the importance of surface Sr segregation in Cr deposition and emphasizes the need for attention in practical applications in solid oxide fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Materials Science, Multidisciplinary
Hanchen Tian, Zheyu Luo, Yufei Song, Yucun Zhou, Mingyang Gong, Wenyuan Li, Zongping Shao, Meilin Liu, Xingbo Liu
Summary: In recent years, the hydrogen economy has gained strong support from governments and industrial bodies worldwide. Protonic ceramic electrochemical cells (PCECs) have attracted significant attention due to their lower operation temperature, reversible operation, and potential for further development. However, there are still many challenges that need to be addressed. This review aims to provide insightful perspectives on the critical challenges facing PCEC development, prioritize future efforts, and propose promising directions for advancement.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Engineering, Environmental
Ting Liu, Shuang Cheng, Luping Li, Xu Ji, Gyutae Nam, Xingbin Yan, Meilin Liu
Summary: Rechargeable aqueous batteries are hindered by durability, capacity, and Coulombic efficiency issues. However, a new Ni-Zn system with concentrated gel electrolyte, ZnO@C anode, and Ni(OH)2 cathode shows improved stability and capacity. The battery also achieves a high midpoint discharge voltage and maintains high CE, with K+ insertion dominating the reaction mechanism.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zheyu Luo, Yucun Zhou, Xueyu Hu, Weining Wang, Yong Ding, Weilin Zhang, Tongtong Li, Nicholas Kane, Zhijun Liu, Meilin Liu
Summary: This study reports a new class of hexavalent Mo/W-doped proton-conducting electrolyte, BaMo(W)(0.03)Ce0.71Yb0.26O3-delta, which exhibits excellent durability and high ionic conductivity. This material demonstrates significantly enhanced chemical stability against high concentrations of steam and carbon dioxide, while maintaining similar ionic conductivity. P-ReSOCs based on this material show high peak power densities in the fuel cell mode and can operate stably during steam electrolysis.
Article
Materials Science, Multidisciplinary
Fan He, Feng Zhu, Dongliang Liu, Yucun Zhou, Kotaro Sasaki, YongMan Choi, Meilin Liu, Yu Chen
Summary: The electrochemical activity and durability of an air electrode with Pr0.2Ba0.2Sr0.2La0.2Ca0.2CoO3-d (PBSLCC) is boosted through A-site entropy engineering. PBSLCC electrode demonstrates enhanced oxygen reaction activity and excellent durability compared to binary and ternary double perovskites. The high-entropy perovskite PBSLCC offers a rational design for air electrodes in reversible solid oxide electrochemical cells (R-SOECs) with high activity and durability.
Review
Materials Science, Multidisciplinary
Tong Hu, Fan He, Meilin Liu, Yu Chen
Summary: Solid oxide cells (SOCs) have gained widespread attention for their high efficiency in converting various fuels to electricity, renewable electricity to green hydrogen or value-added commodities, and tri-generation of power, heat, and hydrogen. Enhancing the electrocatalytic activity of electrodes through in situ/operando regulation of reaction processes on hetero-structured electrodes has been proven effective in improving the performance and durability of SOCs. The unique compositions, structures, and microscopic features of the heterostructures play a critical role in enhancing the electrocatalytic activity and durability of the electrodes.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Tongtong Li, Shengchi Huang, Nicholas Kane, Jeng-Han Wang, Zheyu Luo, Weilin Zhang, Gyutae Nam, Bote Zhao, Yabing Qi, Meilin Liu
Summary: This study investigates the correlation between the structural evolution of Nb2O5 and its electrochemical properties during lithiation through in situ Raman spectroscopy. The lithium storage mechanism is unraveled using DFT calculations, including adsorption site preference, electronic structure, and specific pathways for lithium transport. This work provides important insights for the design of high-rate lithium storage materials based on niobium compounds.
ACS ENERGY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Nicholas Kane, Zheyu Luo, Yucun Zhou, Yong Ding, Alex Weidenbach, Weilin Zhang, Meilin Liu
Summary: Proton-conducting reversible solid oxide cells are a promising technology for efficient conversion between electricity and chemical fuels, making them well-suited for the deployment of renewable energies and load leveling. The bilayer electrolyte design combines a highly conductive electrolyte with a highly stable protection layer, enhancing chemical stability while maintaining high electrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Haoyu Li, Hyong June Kim, ThomasJae Garcia, Geonwoo Park, Yong Ding, Meilin Liu, Jihwan An, Min Hwan Lee
Summary: In this study, a highly effective approach to enhance air electrode performance and durability in solid oxide electrolyzer cells (SOECs) was presented. An ultrathin layer of metallic Ru was deposited onto (La0.6Sr0.4)(0.95)Co0.2Fe0.8O3-& delta; (LSCF) using plasma-enhanced atomic layer deposition (PEALD), resulting in the formation of SrRuO3 perovskite structure which played a crucial role in improving OER durability and reducing resistance to the ORR.
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
Chih-Chieh Cheng, Ting-Yu Lin, Yu-Chieh Ting, Shin-Hong Lin, YongMan Choi, Shih-Yuan Lu
Summary: Single atom catalysts (SACs) are commonly composed of single atoms (SAs) anchored on relatively inert supports containing surface heteroatoms, leading to low specific catalytic efficiency. A new SAC design strategy, anchoring SAs on catalytically active porous supports, was proposed and demonstrated with NiFe-based metalorganic frameworks (MOFs) stabilized Mo and W binary SACs, MOF-MoSAWSA, as highly efficient and stable bifunctional electrocatalysts for electrolytic water splitting.
Article
Chemistry, Physical
Zhikai Shi, Chengwei Mao, Lei Zhong, Jiayao Peng, Meilin Liu, Hexing Li, Jianlin Huang
Summary: By incorporating molybdenum into the Ni3S4 lattices grown on carbonized wood, a novel electrocatalyst MoNi3S4/CW was created for overall water splitting. The addition of molybdenum optimizes the adsorption energy of hydrogen/oxygen species and regulates the local charge density of active sites, promoting the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The electrolyzer composed of Mo-Ni3S4/CW electrodes shows low cell voltage and superior durability for overall water splitting.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Ziming Wang, Ting Tan, Ke Du, Qimeng Zhang, Meilin Liu, Chenghao Yang
Summary: This study reports a new cathode for CO2 electrolysis, consisting of a high-entropy perovskite material coated with in situ exsolved CuFe alloy@FeOx nanoparticles. The cathode exhibits a consistently high current density and excellent stability under pure CO2 conditions, due to the introduction of oxygen vacancies and the extension of the triple-phase boundary.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yoojin Ahn, Tongtong Li, Shengchi Huang, Yong Ding, Shineui Hwang, Weining Wang, Zheyu Luo, Jeng-Han Wang, Gyutae Nam, Meilin Liu
Summary: The mixed phase material d-H,M-Nb2O5 is reported as an excellent anode material for lithium-ion batteries, with the ability to store lithium quickly and maintain stability and reversibility during cycling. The unique structure of d-H,M-Nb2O5 promotes fast charging and high capacity retention over a large number of cycles.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yu-Wei Lin, Yi-Syuan Li, Chun-Wei Chang, Li-Cheng Huang, Tai-Hsin Yin, Yu-Ting Liu, Dong Kyoo Park, Changsik Choi, Yongman Choi
Summary: This study successfully achieved water electrolysis under acidic conditions by using nano-electrocatalysts, improving water splitting performance, and providing a general strategy for preparing novel and highly active OER electrode materials.