LANGMUIR
·
2025
·
IF 3.9
Xiaoming Yu,Meiling Zhang
This study introduces a robust, self-healing superhydrophobic coating for magnesium (Mg) substrates, leveraging the synergistic effects of MQ organosilicon polymer, octadecylamine (ODA), polydopamine (PDA), and copper-loaded graphene oxide (GO). The coating exhibits exceptional superhydrophobicity, outstanding stability in harsh environments, superior resistance to smudging, and effective self-cleaning capabilities. Electrochemical impedance spectroscopy (EIS) in 3.5 wt % NaCl solution demonstrates an impedance modulus (|Z|) at f = 0.01 Hz and polarization resistance (Rp) of 3.49 × 108 Ω cm2 and 3.88 × 108 Ω cm2, respectively, 7 orders of magnitude higher than AZ31B. After 35 days of immersion, |Z|f=0.01 Hz and Rp remain at 3.97 × 107 Ω cm2 and 4.63 × 107 Ω cm2, respectively, highlighting long-term corrosion protection. In cases of damage or corrosion, the dynamic coordination of PDA-Cu2+ enables self-healing, fully recovering visible coating defect up to 10 μm in width within 24 h in 3.5 wt % NaCl solution. This work presents a promising approach for durable, self-healing superhydrophobic coatings with exceptional mechanical and chemical stability.
研究领域:
材料科学
·
纳米技术
·
表面工程
·
腐蚀科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Hu Bai,Zhizhong Leng,Ting Chen,Bo Zhang,Jiaming Chu,Yanhong Zhang,Qi Zhou,Juan Zhou,Shaorong Wang
As clean energy conversion devices with the functions of power generation and hydrogen evolution , solid oxide cells (SOCs) are facing the obstacle of insufficient catalytic activity of traditional electrode materials under the trend of lower operation temperature . Here a double-perovskite material PrBa 0.5 Sr 0·5 Co 2-x Fe x O 5+δ (PBSCF, x = 0.5, 1.0, 1.5, 2.0) is reported and its application as oxygen electrode of symmetrical cells on the proton conductor BaZr 0·1 Ce 0·7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb1711) is investigated. The tests are carried out under atmospheres with different water content (0, 20% and 40%), showing the influence of Fe/Co molar ratio on the crystal structure, conductivity, electrochemical properties and micro morphology of PBSCF series materials. With the increasing of Fe substitution content, the polarization resistance of PBSCF series symmetrical cells decreases. PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF05) symmetrical cell always shows the optimal performance and exhibits area-specific polarization resistance (ASR) of 0.08 Ω cm 2 at 700 °C under 20%H 2 O+80%air. Further experimental results and the distribution of relaxation times (DRT) analysis show that the presence of an appropriate amount of steam in atmosphere would optimize the conductive mechanism and promote proton migration, while the presence of excessive steam would hinder the diffusion of oxygen molecule. For the electrochemical reaction on the PBSCF electrode, the adsorption, dissociation and precipitation of oxygen are always the crucial rate-limiting steps, which is a direction worthy of further optimization.
研究领域:
材料科学
·
电化学
·
能源转换
·
固体化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yuxi Sun,Chuangang Yao,Zhe Zhang,Baixi Xia,Haixia Zhang,Jingyi Ding,Li Zhang,Wenwen Zhang,Xiaoshi Lang,Kedi Cai
The sluggish of the oxygen reduction reaction (ORR) kinetics and the susceptibility to CO 2 interactions are major barriers to the widespread application of solid oxide fuel cells (SOFCs). In this study, a non-metal cation doping strategy was employed to enhance the ORR catalytic activity and CO 2 tolerance of SrFeO 3- δ cathode. SrFe 1- x P x O 3- δ (SFP x , x = 0, 0.05, 0.1, 0.15, 0.2) materials were synthesized by substituting phosphorus (P) for Fe in SrFeO 3- δ . The doping of P facilitated the formation of oxygen vacancies in SrFeO 3- δ , enhancing oxygen adsorption, dissociation, diffusion, and charge transfer processes, leading to a notable increase in ORR catalytic activity. At 800 ℃, the polarization resistance of SFP 0.15 was 0.08 Ω cm 2 , a reduction of 42.86 % compared to undoped SrFeO 3- δ . Additionally, SFP 0.15 achieved a peak power density of 749.36 mW cm 2 , representing a 91.99 % enhancement over SrFeO 3- δ . These findings suggest that non-metal cation doping is an effective approach to boost the performance of SrFeO 3- δ perovskite cathode.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Menglin Wu,Haoyang Yu,Jiupai Ni,Chengsheng Ni
In this work, the perovskite-type La 0.8 Ce 0.2 FeO 3 (LCF) is employed as a host oxide for the exsolution of ceria in air and the further doping on La site using Pr 3+ (La 0.7 Pr 0.1 Ce 0.2 FeO 3 , LPCF) or Gd 3+ (La 0.7 Gd 0.1 Ce 0.2 FeO 3, LGCF) is used to achieve the exsolution of PrO x - and Gd 2 O 3 - doped ceria (PDC and GDC). The exsolution of (doped) ceria is accompanied by the segregation of Fe 2 O 3 that can promote fuel oxidation . The resulting perovskites are used as potential anode materials for solid oxide fuel cells. At 800 °C, the LPCF with 1 wt% Ni infiltration cell on a LSGM (La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3-δ ) electrolyte yields the lowest R p (polarization resistance) value (0.11 Ω cm 2 ) and the highest cell performance (808 mW cm −2 ) in H 2 fuel, but the cells with LCF and LGCF anode show a stable performance under hydrocarbon fuel conditions if Ni is infiltrated into the anode to assist the deprotonation . The parameters controlling the exsolution of the doped ceria and the catalysis for the hydrocarbon reforming are analyzed, proposing an intriguing path to achieving the exsolution of complex oxide on the surface of perovskite for the construct of a hierarchical electrode/catalyst for the applications in fuel conversion.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 47
·26944-26953
·
IF 10.733
Chengsheng Ni,Qimiao Zeng,Debo He,Luo Peng,Deti Xie,John T. S. Irvine,Shukai Duan,Jiupai Ni
Compared to a Ni(O) cermet, an oxide anode is much better for a solid oxide fuel cell at suppressing coking and carbon deposition from carbonaceous fuels. Furthermore, a small amount of metal nanoparticles can enhance the electrochemical performance of the oxide anode while maintaining compatibility with the carbonaceous fuel when anchored on the oxide surface. In this study, ferrate-based perovskites (La0.95Fe0.80Ni0.05Ti0.15O3, LFNT) with Ni0 particle exsolution are investigated via B-site doping to increase the stability at 800 °C in a H2 atmosphere and electrocatalytic capability for fuel oxidation. Surprisingly, the B-site doped LaFeO3 (La0.95Fe0.8Mg0.2O3, LFM) showed a high oxide-ion conductivity of 3.8 mS cm−1 with limited electronic conduction and further doping of Ti4+ or Ni2+ could increase the electronic conductivity to 30 S cm−1 and 100 S cm−1 at 800 °C for the reduced La0.95Fe0.8Mg0.05TiO3 (LFMT) and LFNT, respectively. The cell with the LFNT anode on a La0.9Sr0.1Ga0.8Mg0.2O2.85 electrolyte shows a polarisation resistance of 0.32 Ω cm2 at 800 °C, and a high power density of 600 mW cm−2 can be obtained when ceria is added via infiltration as a co-catalyst.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 47
·20299-20308
·
IF 7.79
Zhishan Li,Meilan Peng,Yingru Zhao,Jianhui Li,Yifei Sun
The mismatch of thermal expansion coefficients (TECs) between cobalt-containing perovskite air electrodes and electrolytes is a great challenge for the development of thermo-mechanically durable solid oxide cells (SOCs). In this work, we propose a facile design principle to directly grow highly dispersed Co reactive sites onto ion-conducting scaffolds and confine the dimension of active centres within nanoscale. As a representative, the Co-socketed BaCe0.7Zr0.2Y0.1O3−δ perovskite (denoted as R-BCZY-Co) was constructed via a consecutive sol–gel and in situ exsolution approach. Combined XRD, H2-TPR, SEM and TEM results confirm the emergence of Co nanoparticles on a BCZY matrix without the segregation of a secondary Co-rich phase. The symmetric half-cell measurement suggests that R-BCZY-Co air electrode with the optimal Co content of 10 mol% exhibits a 7-fold promoted oxygen activation performance with a polarization resistance of ∼0.17 Ω cm2 at 750 °C. The TEC mismatch between fabricated R-BCZY-Co electrodes and BCZY electrolytes is minimized down to only ∼11.4%, which is significantly lower than that of other representative counterparts. Moreover, the detailed XPS result proves that the architecture of exsolved Co on BCZY possesses a higher concentration of surface oxygen vacancy, which further benefits the kinetics of ion diffusion and oxygen absorption.
研究领域:
材料科学
·
电化学
·
固态化学
·
能源材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chuangang Yao,Baixi Xia,Haixia Zhang,Haocong Wang,Wenwen Zhang,Qiuhui Guo,Yubo Jiang,Xiaoshi Lang,Kedi Cai
Cathode materials with high catalytic performance and CO 2 tolerance are essential for advancing the large-scale commercialization of solid oxide fuel cells (SOFCs). This study systematically investigates the impact of fluoride incorporation on the physical characteristics and electrochemical behavior of Pr 0.4 Sr 0.6 CoO 3- δ (PSC) perovskite cathode. The results demonstrate that fluoride incorporation significantly decreases the coefficient of thermal expansion, thereby improving the thermal matching between the cathode and electrolyte materials. Additionally, the introduction of fluoride promotes the formation of oxygen vacancies, which facilitates the oxygen adsorption and dissociation processes, thereby improving the oxygen reduction reaction (ORR) kinetics. Furthermore, fluoride incorporation improves the chemical stability of the material by reducing the surface segregation of Sr, thereby greatly enhancing its CO 2 tolerance. The results reveal that fluoride incorporation markedly lowers the polarization resistance (Rp) and improves ORR catalytic activity and output performance. At 800 ℃, fluoride incorporation reduces the Rp from 0.053 to 0.031 Ω cm 2 , representing a reduction of 41.5 %, while increasing the maximum power density to 1.18 W cm −2 , which is 42.7 % higher than that of the undoped PSC. These findings indicate that fluoride incorporation is an effective strategy for significantly enhancing the electrochemical performance and stability of cobalt-based perovskites, providing a promising approach for the development of high-performance cathodes for SOFCs.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2727-2736
·
IF 2.5
Wu Bingxue,Zhang Jian,Yang Zhi,Lu Xuanlin,Zhao Xin,Liu Wen,Chen Jiaxuan,Zhao Yicheng,Li Yongdan
Ni-based cermets are the most widely used anode materials for solid oxide fuel cells. Reducing the content of Ni is beneficial to anode stability but usually unfavorable for the catalytic activity. In this study, Ni-Ce 0.8 Sm 0.2 O 2-δ anode with a low Ni content is synthesized through a polymer-directed evaporation-induced self-assembly strategy. Ni distributes evenly in the anode, resulting in an enlarged triple-phase boundary region and improved reactivity of lattice oxygen in the oxide phase. The anode containing 5 wt.% Ni possesses the highest amounts of oxygen vacancies and Ce 3+ /Ce 4+ redox pairs that facilitates the charge transfer process, which is one of the rate-determining steps of anode reaction. Consequently, that anode shows the lowest polarization resistance of 0.014 Ω cm 2 at 700 °C, much lower than those of other Ni-based anodes prepared through conventional techniques such as impregnation and solid-mixing. With that anode, a single cell supported by a 480-μm-thick Ce 0.8 Sm 0.2 O 2-δ electrolyte layer exhibits the maximum power density of 270 mW cm −2 at 700 °C. The anode also shows a promising stability.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Liming Zhang,Bingjie Pang,Shiqing Hu,Zhongwei Cao,Peng Zhang,Xuefeng Zhu,Weishen Yang
Protonic ceramic fuel cells (PCFCs) are promising power generation equipment because of their high efficiency and low operating temperature. However, the sluggish oxidation-reduction reaction (ORR) kinetics of the cathode seriously limits their further development. Here, a low-valent alkaline-earth metal Mg-doped BaCo 0.4 Fe 0.4 Zr 0.2 O 3-δ (BaCo 0.4 Fe 0.4 Zr 0.1 Mg 0.1 O 3-δ = BCFZMg0.1) cathode is developed to increase oxygen vacancy concentration and hydration capability of mixed oxygen ion-electron conducting (MIEC) electrode materials . The phase composition , microstructure, and stability in wet air were examined, while the oxygen vacancy , hydration capability, conductivity, and surface species of the materials were investigated. Experimental results demonstrate that the oxygen vacancy concentration, hydration capability, and conductivity are all increased by Mg doping. Consequently, the ORR active sites were expanded to the whole electrode surface , and the electrochemical performance of PCFCs with BCFZMg0.1 cathode was greatly improved (peak power density: >40% increase; polarization resistance : 60–70% decrease). This work provides a new strategy to develop cathodes with high ORR activity for PCFCs by doping Mg into the MIEC perovskite B-site.
研究领域:
材料科学
·
能源工程
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）