Article
Chemistry, Physical
Yueming Xing, Bin Zhu, Liang Hong, Chen Xia, Baoyuan Wang, Yan Wu, Hongdong Cai, Sajid Rauf, Jianbing Huang, Muhammad Imran Asghar, Yang Yang, Wen-Feng Lin
Summary: This study presents a method for tuning the proton conductivity of BaZr0.8Y0.2O3 electrolyte from low bulk to high interfacial conduction by introducing a semiconductor CeO2-delta. The improved conductivity enabled a high peak power and current density output from the proton ceramic fuel cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Ceramics
Zeyu Zhao, Jun Gao, Yuqing Meng, Kyle S. Brinkman, Jianhua Tong
Summary: In this work, a cold sintering pretreatment assisted moderate-temperature sintering method was developed for the fabrication of high-quality pure BZY20 pellets with a relative density of approximately 94%. The proton conductivity of the as-prepared BZY20 pellets was comparable to state-of-the-art values, showing potential for lower sintering temperatures for similar protonic ceramic materials in energy conversion and storage applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Meilong Chen, Mingyang Zhou, Zhijun Liu, Jiang Liu
Summary: This paper compares the performance of two proton-conducting ceramic fuel cell electrolyte materials, BZY and BZCY. The results show that while BZCY has higher conductivity, BZY exhibits greater stability in a CO2-containing environment.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Donglin Han, Kazuaki Toyoura, Tetsuya Uda
Summary: This study investigates the hydration behavior of acceptor-doped BaZrO3 under varying water vapor pressure and reveals that hydration process increases proton concentration and lattice constants. The chemical expansion due to water incorporation influences the local crystal structure and can effectively suppress hole conduction in BaZrO3, showing a feasible strategy to enhance the performance of electrochemical devices.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Electrochemistry
Qingjie Wang, Sandrine Ricote, Yu Wang, Peter Vang Hendriksen, Jianqiang Wang, Ming Chen
Summary: In this study, a composite oxygen electrode was prepared by infiltrating a protonic-electronic conducting material into a proton-conducting backbone. The electrode performance was characterized using EIS and three electrode reaction processes were observed. The developed electrode showed low polarization resistance under varying operating conditions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Analytical
Liang Shan, Jie Zou, Wenwen Chen, Xuebin Li, Xianwei Qian, Weifeng Zhang, Wanlei Gao, Xin Zhang, Qinghui Jin, Jiawen Jian
Summary: The addition of volatile B2O3 to the BZY electrolyte improves its density and enhances the sensitivity and stability of the sensor. The NH3 sensor based on BZY20 electrolyte has a low detection limit, good selectivity, repeatability, and long-term stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Ceramics
Zezhong Wang, Ying Li, Wenlong Huang, Yushi Ding
Summary: In this study, CaHf1-xInxO3-delta perovskite oxides with different doping content were prepared via solid-state reaction method. The results indicated that In doping could improve the conductivities and transport properties of CaHf1-xInxO3-delta, with CaHf0.9In0.1O2.95 exhibiting the highest proton transport number. Therefore, CaHf1-xInxO3-delta shows potential application prospects in electrochemical hydrogen sensor.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yao Yuan, Shohei Tada, Ryuji Kikuchi
Summary: Electrochemically promoted nitrogen reduction on solid-state electrolytes is a promising approach for synthesizing ammonia. NH3 production on an Fe/BZY catalyst was enhanced under applied voltages, with the reaction rates gradually changing as the reaction progressed. The electrochemical promotion of NH3 production was explained by the gradual removal of H adatoms from the catalyst and the resultant increase in N adsorption sites.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Biochemistry & Molecular Biology
Kasra Taghikhani, Alexis Dubois, John R. Berger, Sandrine Ricote, Huayang Zhu, Robert J. Kee
Summary: This paper presents an extended Nernst-Planck computational model that couples charged-defect transport and stress in a tubular electrochemical cell with a ceramic proton-conducting membrane. The model predicts transient and steady-state defect concentrations, fluxes, and stresses within a thin BZY20 membrane, and can be used to predict the performance as a fuel cell or an electrolyzer depending on the polarization. A sensitivity analysis reveals the significance of thermodynamic and transport properties which are often not readily available.
Article
Materials Science, Ceramics
Zezhong Wang, Ying Li, Wenlong Huang, Yushi Ding
Summary: Ba3Ba1+xTa2-xO9-delta oxides demonstrate excellent proton conductivity within a certain temperature range.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hang Bao, Ruijie Chen, Xinrui Wang, Yang Yang, Tianqiang Lin, Xinxin Wang, Xuemei Ou, Yunfeng Tian, Yihan Ling
Summary: Doped BaZrO3 and doped-ceria have potential as electrolyte materials for low-temperature solid oxide fuel cells. By preparing one-step-co-fired BaZr0.8Y0.2O3-delta(BZY)-LCO composite electrolytes, the 3BZY-LCO showed the best overall performance in terms of sintering activity, total conductivity, and cell performance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
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
Donglin Han, Kazuhiro Goto, Masatoshi Majima, Tetsuya Uda
Summary: The addition of NiO in Y-doped BaZrO3, BaCeO3, and BaZr1-xCexO3 decreases dehydration temperature and proton concentration, leading to reduced ionic conductivity and transport number. This results in worse ion conductivity and brittle electrolyte in Ce-rich samples containing Ni.
Article
Engineering, Environmental
Haihan Zou, Peng Yi, Wenbin Xu, He Cai, Junzhe He, Xin Sun, Xufeng Li, Chunyan Chen, Gao Deng, Yingbo Yuan, Zhenyang Li, Ming Fang, Jianglan Shui, Xiaofang Liu, Ronghai Yu
Summary: A room-temperature rapid polymerization strategy is reported here to prepare a conductive organohydrogel with PEDOT:PSS and MXene nanosheets as conductive fillers and cross-linking sites. This organohydrogel has better environmental stability and can be applied in soft robots, wearable electronics, and electromagnetic interference shielding. It exhibits excellent stretchability, self-healing, adhesion, and environmental stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Min Fu, Kailin Li, Yang Yang, Qiaoling Zeng, Long Zeng, Zetian Tao
Summary: The new composite cathode material consisting of LaNi0.6Fe0.4O3-δ (LNF) and Sm0.5Sr0.5CoO3-δ (SSC), namely LNF-SSC73, shows promising electrochemical performance in proton-conducting solid oxide fuel cells, indicating its potential for improving fuel cell performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Donglin Han, Yuki Otani, Kazuhiro Goto, Shigeaki Uemura, Masatoshi Majima, Tetsuya Uda
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Chemistry, Physical
Donglin Han, Akiko Kuramitsu, Takayuki Onishi, Yohei Noda, Masatoshi Majima, Tetsuya Uda
SOLID STATE IONICS
(2020)
Article
Electrochemistry
Katsuhiro Ueno, Naoyuki Hatada, Donglin Han, Kazuaki Toyoura, Tetsuya Uda
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Donglin Han, Kazuhiro Goto, Masatoshi Majima, Tetsuya Uda
Summary: The addition of NiO in Y-doped BaZrO3, BaCeO3, and BaZr1-xCexO3 decreases dehydration temperature and proton concentration, leading to reduced ionic conductivity and transport number. This results in worse ion conductivity and brittle electrolyte in Ce-rich samples containing Ni.
Article
Chemistry, Physical
Donglin Han, Lulu Jiang, Peng Zhong
Summary: This study improved the phase compatibility between BaZrO3-based electrolyte and NiO electrode substrate by adjusting the electrolyte composition and selecting proper dopants. However, high temperature heat treatment during co-sintering led to Ni diffusion into the electrolyte layer, negatively impacting performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
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
Chemistry, Physical
Donglin Han, Kazuaki Toyoura, Tetsuya Uda
Summary: This study investigates the hydration behavior of acceptor-doped BaZrO3 under varying water vapor pressure and reveals that hydration process increases proton concentration and lattice constants. The chemical expansion due to water incorporation influences the local crystal structure and can effectively suppress hole conduction in BaZrO3, showing a feasible strategy to enhance the performance of electrochemical devices.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Sara Adeeba Ismail, Lulu Jiang, Peng Zhong, Truls Norby, Donglin Han
Summary: Doping with A(2+) cations enhanced the hydration degree of La2Ce2O7, which may be due to an increased concentration of hydratable oxygen vacancies and the coordination of oxide ions by A(2+) in addition to La3+, while the basicity of different A(2+) cations seemed to be unimportant.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yifeng Li, Shihang Guo, Donglin Han
Summary: In this study, researchers found that there was good chemical compatibility between NiO and BaZr0.8Yb0.2O3 or BaZr0.8Tm0.2O3 at 1500 degrees Celsius. Additionally, BaZr0.8Y0.1Yb0.1O3 and BaZr0.8Y0.12Yb0.08O3 showed good chemical compatibility with NiO at 1350 and 1500 degrees Celsius. The co-doped BaZrzYxYb0.2-xO3 electrolyte exhibited higher conductivity compared to BaZr0.8Y0.2O3, with BaZr0.8Y0.1Yb0.1O3 showing the highest conductivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Physical
Hui Guo, Lubing Chen, Sara Adeeba Ismail, Lulu Jiang, Shihang Guo, Jie Gu, Xiaorong Zhang, Yifeng Li, Yuwen Zhu, Zihan Zhang, Donglin Han
Summary: This article provides a brief review on the gas diffusion layer (GDL) in proton exchange membrane fuel cells (PEMFCs). The GDL plays a crucial role in connecting bipolar plates and catalyst layers, facilitating gas diffusion and drainage, and providing mechanical support to the membrane electrode assemblies.
Review
Chemistry, Multidisciplinary
Jie Gu, Lulu Jiang, Sara Adeeba Ismail, Hui Guo, Donglin Han
Summary: This review summarizes recent progress on the mechanism, materials, influential factors, and characterization methods of surface protonic conduction on oxide ceramics, and discusses its promising application in low temperature catalysis and solid-state electrochemical devices.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Lulu Jiang, Truls Norby, Donglin Han
Summary: We investigated the proton conducting properties of doped SrZrO3 and found that it exhibits higher transport numbers and other advantages as an electrolyte in proton ceramic electrochemical cells. Through analysis of the chemical expansion properties of SrZr0.9Y0.1O3-δ (SZY10), we determined the partial conductivities of ions and electron holes, as well as the high ionic transport numbers in oxidizing atmospheres and the high electron transport numbers in reducing atmospheres. These results are explained based on defect chemistry and a brick layer model.
Article
Electrochemistry
Shihang Guo, Yifeng Li, Donglin Han
Summary: To improve the performance of protonic ceramic cells (PCCs), it is important to develop high-performance and cost-effective positrodes. In this study, a La1.2Sr0.8NiO4+delta (LS8N) positrode decorated with (La,Sr)CoO3-delta (LSC) nanoparticles was reported by infiltrating Co(NO3)(2) solution. The infiltration process reduced the polarization resistance (Rp) of the positrode and improved its electrochemical performance and durability.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Xinwei Sun, Jie Gu, Donglin Han, Truls Norby
Summary: The surface protonic conductivity of porous monoclinic ZrO2 sintered at different temperatures was studied. The results showed that the proton conduction mechanism was most active at the highest sintering temperature, while the activation enthalpy of proton conduction decreased with decreasing sintering temperature, indicating the importance of the surface adsorption layer. Furthermore, all samples exhibited a strongly inverse temperature dependency below 200 degrees C.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Donglin Han, Peng Zhong, Xiaorong Zhang, Lulu Jiang
Summary: In this study, the changes in the local structure of proton-conducting pyrochlore oxides upon hydration were investigated using EXAFS analysis. It was found that doping proper sites can significantly increase proton conductivity in oxides.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
