文献检索
检索与阿拉丁产品相关的同行评审论文、DOI、PubMed 编号、期刊、作者、CAS 号及研究领域。
科研影响力快照
在搜索之前,这些指标可帮助访客快速了解产品关联科研的规模与质量。
参考指标 指标基于阿拉丁文献引用数据库及期刊影响因子记录。文献关联仅供科研参考,请以原始文献为准。
The high content of Ba and Sc in Ba
Porous hollow carbon spheres (PHCSs) with high surface area and large pore volume were synthesised using a facile template method. After selenium (Se) encapsulation, Se/PHCS composite was formed. The obtained Se/PHCS composite was demonstrated as a suitable cathode material for lithium–selenium batteries.
A novel series of cobalt-free cathode materials, NdBaFe 2− x Mn x O 5+ δ (0.0 ⩽ x ⩽ 0.3), are prepared by a citric acid–nitrate process. X-ray diffraction (XRD) analysis indicates that all the samples are double-perovskite phases with cubic structure. The conductivity dependence of the cathode materials on temperature (300–800 °C) and oxygen partial pressure (1–10 −10 atm) is investigated. Among the tested samples, NdBaFe 1.9 Mn 0.1 O 5+ δ (NBFM10) exhibits the highest conductivity of 114 S cm −1 in air at 550 °C. The H 2 /air fuel cell with the NBFM10–BZCY composite cathode and NiO–BZCY composite anode as well as BaZr 0.1 Ce 0.7 Y 0.2 O 3 − α (BZCY) electrolyte membrane (ca. 30 μm thickness) was assembled and tested at 500–700 °C. The peak power density of the cell reaches 453 mW cm −2 , and the interfacial polarization resistance R p is only 0.06 Ω cm 2 under open circuit conditions, at 700 °C.
Cathode materials greatly govern the performance of protonic ceramics fuel cells (PCFCs), and development of suitable cathodes for PCFCs now becomes important. In this study, the traditional proton conductor BaZrO 3 is tailored with Sr and Fe elements, aiming to design proper cathodes for PCFCs. The structural, electronic, and catalytic effects of dual-element doping on BaZrO 3 -based materials are systemically investigated. Experimental and computational analyses reveal that a 75 % iron doping concentration (BaZr 0 · 25 Fe 0 · 75 O 3 ) markedly enhances oxygen vacancy concentration, reduces proton migration barriers, and elevates electrical conductivity. Notably, moderate strontium doping (50 %) synergistically improves performance, whereas excessive doping (75 %) induces adverse effects on oxygen vacancy concentration, proton migration, and electrical conductivity. The optimized Ba 0 · 5 Sr 0 · 5 Zr 0 · 25 Fe 0 · 75 O 3 cathode achieves a peak power density of 945 mW cm -2 at 700 °C. These findings elucidate the interplay between dopant elements, doping concentrations, and material properties related to electrochemical performance, offering actionable strategies for designing high-performance PCFC cathodes.
La 0.8 Sr 0.2 MnO 3 (LSM)-coated Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 (BSCF) composite powder (LSM-BSCF) was synthesized by a novel solid-solution method and investigated electrochemically as a cathode material for intermediate temperature solid oxide fuel cells. The cathode combined the merits of LSM and BSCF cathodes through an extended triple phase boundary and stabilized microstructure and demonstrated a polarization resistance between 0.61 and 0.09 Ω cm 2 at 600 to 750 °C. Compared with high performance cathodes prepared by solution impregnation, this LSM-BSCF cathode greatly improved performance stability.
In this work, we report FeCo 2 O 4 - x Ce 0.8 Sm 0.2 O 1.9 ( x = 0, 30, 40, 50, 60, 70 wt%), catalyst/electrolyte composite oxides , as cathode materials for application in solid oxide fuel cells. Herein a systematic investigation represents the effect of Ce 0.8 Sm 0.2 O 1.9 incorporation on physical and electrochemical properties . The obtained results indicate that the addition of Ce 0.8 Sm 0.2 O 1.9 to form FeCo 2 O 4 –Ce 0.8 Sm 0.2 O 1.9 composite material plays a key role in physical and electrochemical properties. Among all the components, the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode has the lowest polarization resistance of ∼0.094 Ω cm 2 at 800 °C in air, which is much smaller than that of the FeCo 2 O 4 cathode (4.18 Ω cm 2 ). In comparison with the FeCo 2 O 4 cathode, the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode has a better electrocatalytic activity and a larger power density of 397 mWcm −2 based an electrolyte-supported single-cell configuration at 800 °C. The oxygen partial pressure dependence studies indicate that rate limiting steps of the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode are the adsorption process of the molecular oxygen on the electrode surface and the charge-transfer process. In consequence of these superior properties, it is reasonable to believe that the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 oxide has great potential to become a cathode material for solid oxide fuel cells.
Composite electrodes based on the nitroxide free radical-contained pyrrole copolymer (PPy- co -PPy-C-TEMPO) as active material were one-step synthesized by in situ electrochemical polymerization, which was then directly applied as the cathode of lithium ion batteries. The structure, morphology, electrochemical property, and charge-discharge performances of prepared copolymers were characterized by FTIR, SEM, cyclic voltammogram, electrochemical impedance spectroscopy, and galvanostatic charge-discharge testing, respectively. The results demonstrated that PPy- co -PPy-C-TEMPO-based composite cathodes have been successfully prepared by in situ electrochemical method, and the introduction of the nitroxide free radical (TEMPO) could obviously affect the morphology and electrochemical characteristics of the obtained electroactive polymers. And the charge/discharge tests showed that with the introduction of the TEMPO, PPy- co -PPy-C-TEMPO-based composite cathodes exhibited an improved specific capacity of 70.9 mAh g −1 for PPy- co -PPy-C-TEMPO (4:1) and 62.6 mAh g −1 for PPy- co -PPy-C-TEMPO (8:1) as measured at 20 mA g −1 between 2.5 and 4.2 V, which were remarkably higher than that of the pure PPy cathode of 41.0 mAh g −1 under the same experimental conditions. Also, the obtained PPy- co -PPy-C-TEMPO copolymers demonstrated an acceptable cycling stability during the charge-discharge process. These obtained cell performances for the composite cathodes were attributed to the application of the in situ electrochemical polymerization technology, which enhanced the intimate integration between conductive polymer film and electrode. Furthermore, the introduction of TEMPO-contained pyrrole (Py-C-TEMPO) improved the morphology of the composite cathode, which was in favor of the utilization of active materials and the improved electrochemical performances.
Graphical Bipolar ion storage : Thionin (Thn-CH 3 COO), a biological dye, can be also used as a high-performance bipolar-type organic cathode material for aqueous rechargeable zinc batteries. In the Zn(CF 3 SO 3 ) 2 electrolyte, both CH 3 COO − and CF 3 SO 3 − anions participate the p-type reaction, while H + cation dominate the n-type reaction. Organic cathode materials (OCMs) have been widely applied in aqueous rechargeable zinc batteries (ARZBs), but there are still many novel structures to be explored for better electrochemical performance and clearer mechanism. Herein, we have studied an organic biological dye, namely thionin (Thn-CH 3 COO), as a bipolar-type OCM for ARZBs based on its electroactive phenothiazine unit. In the optimal electrolyte of 2 M Zn(CF 3 SO 3 ) 2 , Thn-CH 3 COO exhibited the lowest solubility and thus the highest cycling stability (94 % capacity retention after 100 cycles), with a reversible capacity of 162 mAh g −1 (the theoretical value is 186 mAh g −1 ) and a discharge plateau at ∼0.8 V vs. Zn 2+ /Zn. Various characterization and DFT calculations have revealed that both CH 3 COO − and CF 3 SO 3 − anions and H + cations participated the p-type and n-type reactions, respectively. In brief, the novel structure, competitive performance, and exhaustive mechanism investigation will facilitate the further development of ARZBs based on OCMs.
In the widely researched and demonstrated molten salt-based electrorefining process, it is extremely important to control the morphology and growth of uranium dendritic in order to guide the design, operation, safeguard and even upgrade of industrial equipment. Herein this work focuses on the influences of various electrochemical techniques and cathode materials on the dendrite growth and deposition performance for uranium electrorefining. The corresponding current efficiency, deposition rate , deposit compactness, dendrite size distribution and growth rate were studied and compared. It was found that the electrode material has limited effects on the current efficiency, whilst the deposition rate of uranium and growth rate of dendrites on inert cathodes (W and Mo) are relatively higher than that on active cathodes such as stainless steel, Ni and graphite. For controlled current techniques, both the uranium deposition rate and dendrite growth rate are linearly related to the current density. For the controlled potential techniques, only the uranium deposition rate has a linear relationship with the overpotential, whilst the dendrite growth rate has a power exponential relationship with the overpotential. Regardless of the electrolysis technique, controlling the growth of uranium dendrites will sacrifice the deposition rate. In addition, the pulse potential technique can exponentially reduce the growth rate of uranium dendrite at the expense of 30–40% deposition rate.
In this study, the K 2 NiF 4 -type La 1.8 Sr 0.2 CuO 4 has been hydrothermal synthesized and applied in Mg-air battery. The hydrothermal time and heat treatment temperature of synthesized La 1.8 Sr 0.2 CuO 4 has been discussed. X-ray diffraction (XRD) and scanning electron spectroscopy (SEM) were carried out to demonstrate the crystalline structure and morphology of synthesized materials. The electrochemical impedance and discharge performance were studied to understand the catalytic activities of La 1.8 Sr 0.2 CuO 4 . The La 1.8 Sr 0.2 CuO 4 with active carbon addition (La 1.8 Sr 0.2 CuO 4 /AC) in Mg-air battery was found to hold specific discharge capacity of 962 mAh g -1 at current density of 40 mA cm -2 , which was higher than that of the bulk electrode (i.e.,782 mAh g -1 ). The K 2 NiF 4 -type La 1.8 Sr 0.2 CuO 4 has been proved as a potential candidate for air cathode in Mg-air battery.
The perovskite Sm0.95Ba0.05Fe0.95Ru0.05O3 (SBFR) is investigated to assess its possible use as a potential cathode material for solid oxide fuel cells. SBFR shows good thermal stability and has good chemical compatibility with the yttria-stabilized zirconia (YSZ) electrolyte below 1000 °C. In the oxygen partial pressure (pO2) range of 0.01–0.6 atm, the electrical conductivity of the SBFR sample follows a pO21/6 dependency, attributed to p-type electronic conductor behavior. Polarization resistance (Rp) increases with a decrease in pO2 (n = 0.53) and decreases with an increase in the amplitude of the applied direct current (DC) bias at 800 °C. The Rp values of the SBFR sample on the YSZ electrolyte in symmetrical cells are 0.28, 0.22, 0.15 Ω cm2 at 700, 750 and 800 °C, respectively, and the maximum power density of the YSZ electrolyte-supported single cell with the Ni-YSZ anode and SBFR cathode reaches 465 W cm−2 at 800 °C using pure H2 as a fuel and ambient air as an oxidant.
Lithium-sulfur batteries have become a potential candidate for a new generation of energy storage devices due to their extremely high theoretical capacity, but their shuttle effect and poor conductivity of sulfur and final discharge products hinder their commercial development. In this paper, ZIF-8 material with a large specific surface area was successfully prepared with metallic zinc as the central atom and dimethylimidazole. After sintering at 800 °C, the mesoporous carbon material was obtained, which increased its physical adsorption of sulfur. At the same time, titanium dioxide was coated on the mesoporous carbon material to obtain a core-shell structure with a specific surface area of up to 556.1 m 2 /g. The titanium dioxide coating well inhibits the occurrence of the shuttle effect and at the same time improves the cycle stability of the lithium-sulfur battery. The specific discharge capacity of the battery reaches 1351 mAh/g at 0.1 C.
文献关联基于可获得的产品、CAS、DOI 及引用记录。收录不代表作者或出版方对阿拉丁产品的背书,请以原始文献为准。
危险品化学品经营许可证（带存储）