Article
Materials Science, Ceramics
Gaopeng Zhou, Ying Li, Yadan Luo, Wenlong Huang, Bo Li
Summary: This study investigates the substitution effect of different Ca2+ concentrations at A-sites in perovskites and its impact on the electrical properties and chemical stability. The results show that increasing Ca2+ concentration improves the chemical stability but reduces the conductivity of the materials.
CERAMICS INTERNATIONAL
(2023)
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, 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
Materials Science, Ceramics
L. S. Hagy, K. Ramos, M. V. Gelfuso, A. L. Chinelatto, A. S. A. Chinelatto
Summary: The reduction of sintering time and temperature for BaCe0.2Zr0.7Y0.1O3-delta was investigated using unconventional route and sintering aid. Effects of ZnO addition and microwave sintering on structure, sinterability, microstructure, and electrical conductivity were explored. Both ZnO addition and microwave sintering improved the density and conductivity, with microwave sintering providing a rapid alternative for sintering.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ho-Il Ji, Byung-Kook Kim, Ji-Won Son, Kyung Joong Yoon, Jong-Ho Lee
Summary: This study investigated the influence of CuO and ZnO sintering activators on the densification behavior, distribution of sintering activators, and electrical properties of Y-doped BaZrO3-delta proton conducting oxide. The results showed that high relative density can be achieved at specific sintering temperatures, and the proton conductivity and defect structure of different compositions were analyzed to compare their performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Ceramics
A. S. Lesnichyova, S. A. Belyakov, A. Yu Stroeva, A. V. Kuzmin
Summary: Through a series of experiments, it was found that La0.9Sr0.1ScO3-delta exhibits the highest proton conductivity at 800 degrees Celsius, making it suitable for various electrochemical devices. The study results indicate that an increase in Sr dopant concentration will increase the partial conductivity of each charge carrier.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Zhen Wang, Luyao Ding, Shenglong Yu, Huan Xu, Xiaohui Hao, Yi Sun, Tianmin He
Summary: A comparative study was conducted to investigate the effect of different addition strategies for a sintering aid of ZnO on the performance of the BaZr0.4Ce0.4Y0.2O3-delta electrolyte. The results showed that the internally-doped sample exhibited higher relative density and lower grain boundary core barrier height, leading to higher power density and better ion transport performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Ceramics
Hongzheng Li, Ying Li
Summary: KTaO3 and KTa0.9M0.1O3-alpha (M = Ti, Hf, Zr) were prepared and characterized. Among them, KTa0.9Zr0.1O3-alpha exhibited the highest conductivity in 1%H2/Ar atmosphere and acted as a pure proton conductor below 525 degrees C. Additionally, KTa0.9Zr0.1O3-alpha showed good chemical stability against CO2 and H2O.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Hongzheng Li, Ying Li, Wenlong Huang, Yushi Ding
Summary: KNbO3 and KNb0.9M0.1O3-α (M = Ti, Hf, Zr, Sc, In, Yb) were synthesized and characterized for their conductivity. Among them, KNb0.9In0.1O3-α showed the highest conductivity. The conductivity order in different atmospheres was wet air > wet Ar > dry Ar. KNb0.9In0.1O3-α was found to be a nearly pure proton conductor below 625°C. It also exhibited excellent chemical stability against CO2 and H2O, but should be used with caution to avoid rapid heating and cooling.
SOLID STATE IONICS
(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
Engineering, Chemical
Adelya Khaliullina, Anastasia Meshcherskikh, Liliya Dunyushkina
Summary: The effect of Sr deficiency on the hydration process and conductivity of SrZrO3 proton conductors was investigated. Sr deficiency was found to enhance hydration ability and the ceramics with certain Sr deficiency showed purely protonic conductivity in humid atmospheres. The highest conductivity was achieved at a Sr content of 0.98.
Article
Chemistry, Physical
Hiroki Uehara, Akihiro Ishii, Itaru Oikawa, Hitoshi Takamura
Summary: A new mixed proton-hole conducting material is developed by doping cobalt into BaZr1-xScxO3-delta, which exhibits high hole conductivity. The study investigates the phases present, proton incorporation, and electrical conductivity of BaCoxZr0.9-xSc0.1O3-delta. It is found that Sc doping increases the cobalt solubility limit in BaZrO3 and conductive protons are incorporated in the bulk portion of Co, Sc-doped BaZrO3. BaCoxZr0.9Sc0.1O3-delta shows higher conductivity than Fe or Pr doped BaMxZr1-x-yYyO3-delta. The maximum conductivity is achieved for BaCo0.2Zr0.7Sc0.1O3-delta in both wet and dry oxidizing atmospheres.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Angel Trivino-Pelaez, Domingo Perez-Coll, Jadra Mosa, Clemens Ritter, Ulises Amador, Glenn C. Mather
Summary: This study focuses on the influence of barium deficiency on the structure, stability, and electrical conductivity of BCY20, showing that barium-deficient materials have greater distortion, free volume, and conductivity compared to BCY20.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
L. Spiridigliozzi, G. Accardo, E. Audasso, S. P. Yoon, G. Dell'Agli
Summary: Orthorhombic perovskite materials BaCe0.85Gd0.15O3-& delta; (BCGO) doped with variable amounts of CuO (0-5 mol%) were synthesized and exhibited high total ionic conductivities. Various characterization techniques were used to analyze the samples, including X-ray Diffraction (XRD), Rietveld refinement, Scanning Electron Microscopy (SEM), Raman spectroscopy, and Electrochemical Impedance Spectroscopy analysis (EIS). The addition of copper as a sintering aid improved the density and conductivity of BCGO, with the optimal content being around 2 mol%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Gara Kishor, R. N. Bhowmik, A. K. Sinha
Summary: Doping of various ions in M-type BaFe12O19 hexaferrite has been achieved through mechanical alloying and heat treatment, resulting in changes in structural phase, crystallite size, lattice strain, and magnetic moment.
Article
Engineering, Chemical
Shipeng Zeng, Zilu Liu, Hailei Zhao, Tianrang Yang, Xu Dong, Zhihong Du
Summary: A novel mixed oxygen ionic-electronic conductor-molten carbonate composite membrane was developed for high temperature CO2 separation, addressing stability issues in CO2 environments. The LSFM-molten carbonate membrane exhibited excellent CO2 permeation performance under different conditions, showing potential for various applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yang Zhang, Leyu Shen, Yuhao Wang, Zhihong Du, Binze Zhang, Francesco Ciucci, Hailei Zhao
Summary: The article reports the successful synthesis of a dual-phase cathode material with remarkable oxygen reduction reaction activity and low polarization resistance. The coherent interface structure formed between the two phases is beneficial to alleviate lattice thermal expansion and guide oxygen transport. The results demonstrate the promising application of this dual-phase composite material in intermediate/low-temperature solid oxide fuel cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Biochemistry & Molecular Biology
Kun Zheng, Jakub Lach, Hailei Zhao, Xiubing Huang, Kezhen Qi
Summary: Magnesium-doped double perovskites with excellent redox stability were successfully obtained in this study. The physicochemical properties of these materials were systematically investigated, showing potential for application as electrode materials in symmetrical SOFCs.
Article
Chemistry, Physical
Yang Zhang, Hailei Zhao, Min Zhang, Zhihong Du, Wanbing Guan, Subhash C. Singhal, Konrad Swierczek
Summary: A novel SBMCo electrode, consisting of exsolved metallic cobalt for the anode and cobalt oxide for the cathode, is elaborately designed for symmetrical solid oxide fuel cells (SSOFCs). The results show that the rate-limiting steps for hydrogen oxidation at the anode and oxygen reduction at the cathode are significantly promoted by the exsolved nanoparticles on the SBMCo backbone, allowing the electrodes to exhibit remarkable catalytic activity.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Jakub Lach, Kun Zheng, Ryszard Kluczowski, Anna Niemczyk, Hailei Zhao, Min Chen
Summary: Cu-content La1-xSrxNi1-yCuyO3-delta perovskites with A-site strontium doping are promising cathode candidates for anode-supported SOFCs in the intermediate-temperature range, exhibiting high power density and improved thermal expansion properties.
Article
Chemistry, Physical
Hongliang Xie, Peng Chu, Min-an Yang, Zehao Li, Changkun Cai, Yipeng Liu, Jie Wang, Zhaoming Fu, Zhansheng Lu, Zhihong Du, Hailei Zhao
Summary: This research proposes a novel electrode design for liquid metal batteries, achieving high energy density. The study demonstrates the potential of using appropriate material combinations and reaction conditions to significantly improve battery performance.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhao Yang, Zhaolin Li, Yaozong Yang, Qian Zhang, Hongliang Xie, Jie Wang, Konrad Swierczek, Hailei Zhao
Summary: An efficient surface modification strategy was proposed to significantly increase the initial Coulombic efficiency (ICE) of SiO anode material. SiO@Fe material with Fe nanoclusters decorating the SiO surface was successfully prepared. The well-dispersed Fe nanoclusters realized an Ohmic contact with lithium silicates, reducing electron conduction barriers and promoting lithium-ion release, leading to higher ICE of the SiO anode. The prepared SiO@Fe exhibited an unprecedented increase in ICE (23%) compared to pristine SiO, and showed improved cycling and rate performance.
Article
Chemistry, Physical
Yang Zhang, Hailei Zhao, Min Zhang, Tianrang Yang, Zhihong Du
Summary: This study proposes a high-performance symmetric electrode material, SBMTi, which exhibits excellent structural stability and catalytic activity. The doping of titanium significantly enhances the material's performance, making it a promising candidate for fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Shuping Zhang, Jianyang Wu, Guangyu Zhao, Jing Chen, Huanfang Yang, Xiaorui Jiang, Miao Li, Bin Wu, Wen Liu, Henghui Zhou, Hailei Zhao
Summary: By surface coating and heat annealing LiCoO2 with Li2CoP2O7, the high-voltage performance of LiCoO2 can be improved, achieving high-voltage stability and high lithium-ion conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Applied
Peng Chu, Jie Wang, Hongliang Xie, Qian Zhang, Jiangyuan Feng, Zehao Li, Zhao Yang, Hailei Zhao
Summary: A novel Sb64Cu36 cathode is proposed to address the issues of unsatisfactory energy density and poor rate-capability of antimony-based cathodes. The cathode utilizes a lithiation mechanism involving the generation of Li2CuSb, the formation of Li3Sb, and the conversion reaction of Li2CuSb to Li3Sb and Cu. The unique microstructure of the generated intermetallic compounds enables enhanced lithium diffusion and reaction kinetics, resulting in excellent electrochemical performance and low energy storage cost.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Review
Chemistry, Physical
Yuhao Wang, Jiapeng Liu, Yufei Song, Jing Yu, Yunfeng Tian, Matthew James Robson, Jian Wang, Zhiqi Zhang, Xidong Lin, Guodong Zhou, Zheng Wang, Longyun Shen, Hailei Zhao, Salvatore Grasso, Francesco Ciucci
Summary: Perovskites have shown great potential in energy conversion and storage technologies. High-entropy perovskites (HEPs) have emerged as a new type of perovskite framework due to their excellent stability and performance. This work reviews the recent progress in HEPs, including synthesis methods and applications, and explores effective strategies for their design through atomistic computations. The outlook of this field provides guidance for the development of new and improved HEPs.
Article
Chemistry, Multidisciplinary
Zhihong Du, Leyu Shen, Yue Gong, Min Zhang, Jingyan Zhang, Jiangyuan Feng, Keyun Li, Konrad Swierczek, Hailei Zhao
Summary: This study presents a highly active and durable nanocomposite cathode material for low-temperature SOFCs. The material self-assembles into two perovskite structures, balancing high catalytic activity and stability. PBSCF-c serves as a highly conductive and active catalyst, while BSCFW-c significantly enhances the ORR activity through introducing lattice tensile strain.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yaozong Yang, Zhaolin Li, Yuesong Xu, Zhao Yang, Yang Zhang, Jie Wang, Hong Xu, Xiangming He, Hailei Zhao
Summary: The need for higher-energy-density batteries has arisen due to the increasing demand for electric vehicles. Silicen (Si) has been considered as an alternative anode material to graphite because of its high theoretical capacity. However, the volume change in Si during charge/discharge cycles leads to particle fracture and rapid capacity degradation. Silicon suboxide (SiOx) anodes exhibit better cycling performance than Si, but electrode reaction kinetics remain insufficient. In this study, fluoroethylene carbonate (FEC)-based electrolyte is proposed to enhance the electrochemical properties of SiOx anodes. The addition of FEC results in higher specific capacity and excellent rate capability for SiOx anodes, leading to improved cycling stability of SiOx||LiFePO4 cells.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Hongliang Xie, Jiangyuan Feng, Hailei Zhao
Summary: Lithium metal batteries with different configurations, such as all-solid-state and full-liquid, are gaining attention as the most promising replacement for current Li-ion batteries due to their advantages in energy density, rate performance, safety, and service lifetime. However, there are still challenges, such as Li dendrite growth, parasitic chemical reactivity, and high operating temperature, that need to be addressed. This review provides a comprehensive overview of the scientific progress, including fundamental understandings, technological innovations, and possible research directions, to facilitate the commercialization of Li metal batteries.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Min Zhang, Zhihong Du, Zhipeng Sun, Hailei Zhao
Summary: This article proposes a BaCO3-infiltrated SmBaFe2O5+delta (SBF) electrode with significantly enhanced catalytic activity. The theoretical computation and experimental study demonstrate that BaCO3 can accelerate the oxygen adsorption/dissociation kinetics, which improves the performance of the electrode. The BaCO3-infiltrated SBF electrode exhibits superior electrochemical performance and structural stability in both fuel cell and electrolysis cell modes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
