CERAMICS INTERNATIONAL
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2025
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IF 5.6
Zheqin Chen,Yongmin Xie,Zhibin Lu,Xiaocong Zhong,Zhifeng Xu
This research addresses the issue of particle agglomeration and a low catalytic activity in the traditional sol–gel preparation of LaNi 0.5 Co 0.5 O 3 (LNCO). A new synthetic strategy is proposed, leveraging the combination of polyvinylpyrrolidone (PVP) serving as a complexing agent and graphene nanosheet (GN) functioning as a template, successfully producing a high-activity LNCO cathode material (GN-LNCO) with a layered structure. Various characterizations confirmed that incorporating PVP and GN effectively suppressed particle agglomeration at high temperatures. The optimized GN-LNCO exhibited excellent physicochemical properties, including a specific surface area of 45.21 m 2 g −1 , a more regular mesoporous structure, a higher electronic conductivity, and a greater oxygen vacancy concentration. Electrochemical performance tests showed that the GN-LNCO cathode demonstrated an outstanding performance in solid oxide fuel cells at 800 °C, with a peak power density of 350.91 mW cm −2 . This represented an improvement of 28.65% over the conventional LNCO. Additionally, a 72 h long-term stability test of a GN-LNCO single cell revealed a voltage decay rate of only 1.60%, indicating its excellent stability. Overall, this study provides a novel material design strategy for developing high-performance cathodes, which has significant implications for advancing solid oxide fuel cell technologies.
研究领域:
材料科学
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电化学
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能源技术
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纳米技术
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zhao-Mu Zhang,Jia-Hong Li,Yan-Neng Liang,Yuan Gao,Cheng-Xin Li
ScSZ is one of the traditional electrolyte candidates for solid oxide fuel cells (SOFCs) due to its excellent ionic conductivity. Nevertheless, its complex phase structure and high sintering temperature hinder further development. Herein, the effects of Yb 2 O 3 and Al 2 O 3 doping on conductivity and sintering ability as well as the long-term stability in ScSZ electrolyte are studied and discussed in detail. XRD and EIS tests revealed that the ZrO 2 electrolyte stabilized by 1 mol% Yb 2 O 3 and 10 mol% Sc 2 O 3 achieved a stable phase structure and high conductivity. Subsequently, the addition of 0.1 mol% Al 2 O 3 sintering aid reduced the densification temperature by more than 100 °C, achieving a density of over 96 % without significant decrease in ionic conductivity, with values of 0.12 S cm −1 in air at 750 °C. Long term stability test reveals that the ScSZ electrolyte doped with Yb 2 O 3 and Al 2 O 3 maintains a stable phase structure and exhibits no significant degradation in electrical performance after being held at 800 °C for 1080 h. In conclusion, the Yb 2 O 3 doped ZrO 2 electrolyte with 0.1 mol% Al 2 O 3 sintering aids exhibits a potential candidate material used in SOFCs.
研究领域:
材料科学
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能源技术
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固态离子学
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燃料电池
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
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2021
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IF 3.605
Jiaming Yang,Junkai Wang,Lei Fu,Ke Wu,Zhengrong Liu,Kai Wu,Jun Zhou
Fibrous perovskite oxide has been the most promising cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs) due to its efficient mass and charge transfer. Herein, a core–shell fiber-structured YCo0.5Fe0.5O3 (YCF)–Gd0.1Ce0.9O1.95 (GDC) cathode is synthesized via the modified electrospinning technique. These unique YCF–GDC fibers exhibit a uniform diameter of 300 nm, and the GDC particles are attached to the YCF fiber cores. The electrochemical performance demonstrates a relatively low area-specific resistance of 0.66 Ω·cm2 at 550 °C in air, which is much lower than 1.56 Ω·cm2 of pure YCF fiber cathode. Moreover, the distribution of relaxation times (DRT) analysis results indicate that the introduction of GDC nanoparticles and the core–shell structure greatly facilitate oxygen-ion conduction and charge transfer processes, and the oxygen incorporation process plays a major role in the total polarization resistance. The NiO–GDC|GDC|fibrous YCF–GDC fuel cell shows a maximum power density of 426.5 mW·cm–2 at 550 °C. These results display that the core–shell fiber-structured YCF–GDC composite oxide is a promising candidate of highly active cathode for IT-SOFCs.
研究领域:
材料科学
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电化学
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能源材料
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燃料电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Hongdong Cai,Dan Zheng,Chen Xia,Xunying Wang,Wenjing Dong,K.Sivajee Ganesh,Hao Wang,Baoyuan Wang
CeO 2 existed in the form of quantum dots were used in fuel cell electrolytes for the first time after being compounded with semiconductor TiO 2 . The TiO 2 @xCeO 2 (x = 1,2,3) was evaluated as the membrane electrolyte for the semiconductor-ions membrane electrolyte fuel cells using H 2 as fuels. The maximum power density of the TiO 2 @ 2CeO 2 quantum dot electrolyte at 550 °C reaches 839 mW cm −2 , and the ion conductivity reaches 0.11 S cm −1 , which is higher than the physically mixed TiO 2 /CeO 2 composite under the same operating environment. The energy band structure and rectification characteristics test show that the cell based on TiO 2 /CeO 2 electrolyte membrane has a physical junction effect, which can prevent electrons from passing through the interior and effectively avoid short-circuit problems. This study shows that the TiO 2 @xCeO 2 (x = 1,2,3) composite in quantum dots form is a promising electrolyte that can promote the development of low-temperature solid oxide fuel cell.
研究领域:
材料科学
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能源工程
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电化学
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纳米技术
✓ 已验证
DOI
高影响因子
SURFACE REVIEW AND LETTERS
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2017
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IF 0.491
FEI LI,JINGDE ZHANG,JUNPENG LUAN,YALEI LIU,JIANXUN HAN
The NiO/YSZ anode materials of SOFCs with Bi 2 O 3 as sintering aids were successfully prepared by dry-pressing process. The effects of Bi 2 O 3 content on the sintering properties of NiO/YSZ anode materials were studied, including the effects on the density, open porosity, weight loss, phase composition, microstructure, mechanical strength and electrical conductivity. In particular, the weight loss, relative density and bending strength of the sintered NiO/YSZ ceramics increased with the increase of Bi 2 O 3 content while the open porosity decreased gradually. The density of the NiO–YSZ ceramics with 6 wt.% Bi 2 O 3 sintered at 1250 ∘ C could reach that of the ceramics without Bi 2 O 3 sintered at 1400 ∘ C. For Bi 2 O 3 concentration higher than 6 wt.%, phase transformation of zirconia from monoclinic to cubic structure occurs, causing volume change and microcracks in the anode materials. Therefore, the optimum adding amount of Bi 2 O 3 is 6 wt.%, which can reduce the sintering temperature to 1250 ∘ C. The ceramics with 6 wt.% Bi 2 O 3 have relatively high bending strength and low sintering temperature. This is of great significance for improving the performance of the anode and cutting the cost.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Cui Qiao,Jie Yu,Shu-qiu Hu,Xin Ding,Wei-tian Yang,Shao-yuan Li,Guo-qiang Lv,Wen-hui Ma
Composite ceramic electrolytes with heterostructure have attracted wide attention from the scientific community due to their enhanced conductivity and stability compared with single component electrolytes. Along these lines, in this work, to improve the conductivity of lanthanum silicate, a series of La 10 Si 6 O 27 (LSO) - La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 (LSGM) electrolytes were developed, which were composed of apatite/perovskite heterostructure. The phase composition, heterogeneous structure, and morphology of the samples were investigated by performing X-ray diffraction (XRD), transmission electron microscopy (TEM) measurements, as well as, field emission scanning electron microscopy (FE-SEM) for in-depth analysis. In addition, the Archimedes method was employed to test the relative density of the samples. X-ray photoelectron spectroscopy (XPS) was used to examine changes in oxygen vacancies at different LSGM contents. Compared with the pure LSO material, the content of oxygen vacancies increases significantly and the conductivity is highest when the LSGM content is 10 %, which indicates that the newly formed oxygen vacancies in the composite LSO-LSGM electrolyte play an important role in improving the ionic conductivity . At 400 °C, the conductivity of 90 wt%LSO:10 wt%LSGM was 3.4 times that of pure LSO, and at 600 °C, the conductivity of 90 wt%LSO:10 wt%LSGM was an order of magnitude higher than that of pure LSO. From the electrochemical impedance spectra (EIS) analysis, it was shown that the small resistance achieved by the grain boundary was the main reason for its excellent performance. Our results provide valuable insights for the design of more composite electrolytes for intermediate-temperature SOFCs .
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Hongyi Li,Yanli Wang,Huijun Liu,Lingxu Yang,Zhengliang Liu,Chaoliu Zeng
Excellent Cr diffusion resistance and interface stability is essential for coatings applied on the surface of ferrite stainless steel interconnect for SOFCs. Four kinds of materials, the equimolar (MnFeCoNiCu) 3 O 4 (Eq), non-equimolar (Mn 0·272 Fe 0·272 Co 0·272 Ni 0·092 Cu 0.092 ) 3 O 4 (Non-Eq), MnCo 2 O 4 (MC) and the Quaternary (MnFeCoNi) 3 O 4 (Quaternary), are combined with chromium oxide to form diffusion couples in order to study the interfacial reaction mechanism. The constitutes and morphologies of the samples are tested. Two different composition reaction layers are found in equimolar/Cr 2 O 3 diffusion couple. A slight Cr inward diffusion is detected in Quaternary/Cr 2 O 3 diffusion couple.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2014
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IF 2.726
Qingjun Zhou,Tong Wei,Zepeng Li,Dongmin An,Xiaoqiang Tong,Zhaohui Ji,Weibo Wang,Hao Lu,Luyao Sun,Zhiyang Zhang,Ke Xu
The BaBi 0.05 Co 0.8 Nb 0.15 O 3− δ (BBCN) oxide has been synthesized by the traditional solid-state reaction method and characterized for its application as new cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The single phase BBCN having a cubic perovskite structure is obtained by Bi and Nb doping on the Co site in BaCoO 3− δ . The electrical conductivities of the BBCN sample are 8.8–12.5 S cm −1 in the temperature range 600–800 °C in air. The average thermal expansion coefficient (TEC) is 20.7 × 10 −6 K −1 in the range of 30–1000 °C in air. The activity of BBCN for oxygen reduction reaction (ORR) is tested by symmetrical cell and single fuel cell tests. The area specific resistance (ASR) of a BBCN cathode with LSGM electrolyte is 0.073 Ω cm 2 at 700 °C in air. A maximal power density of 610 mW cm −2 is achieved at 800 °C. The BBCN cathode has shown a good electrochemical stability for 24 h short-term cell test. The experimental results indicate that BBCN can be a promising cathode candidate for IT-SOFCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yunhe Zhang,Xuelong Li,Duoyu Zhou,Hanghang Kang,Li Li,Wansheng Zong,Jianhua Liu,Fengyang Yu,Lina Su
Constructing beneficial heterostructured interfaces in cathode materials represents an effective strategy for enhancing cathodic oxygen reduction reaction kinetics in intermediate-temperature solid oxide fuel cells (IT-SOFC). Herein, a novel heterostructured nanocomposites Pr 0.5 Ce 0.1 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ -CeO 2 (PCSCF-C1) was designed by substituting partial Pr 3+ (1.013 Å) with larger Ce 3+ (1.34 Å) ions, coupled with a redox-induced phase transformation (Ce 3+ →Ce 4+ ). Specially, the in situ -engineered heterointerface introduces a 1.15% lattice tensile strain, which weakens the B-O bonding energy, increases oxygen vacancy concentration, and accelerates the surface oxygen exchange rate through synergistic effects. As a result, the PCSCF-C1 cathode exhibits a low polarization resistance ( R p ) of 0.020 Ω·cm 2 at 800 °C in LSGM-based symmetric cells, together with improved CO 2 tolerance. When integrated into an anode-supported single cell, it delivers a maximum peak power density of 2.29 W·cm −2 at 800 °C and maintains stable operation over 248 h at 750 °C. This work demonstrates a lattice strain-engineered heterostructure design for advancing high-performance IT-SOFC cathodes.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2025
·
IF 2.7
Jie Zheng,Chensong Liang,Ying Li,Yongtao Huang,Tianlong Wang,Wei Zhang,Chunsheng Zhuang
The study presents a novel heterostructure electrolyte composed of fluorite-structured Sm 0.2 Ce 0.8 O 1.9 (SDC), hexagonal YBaCo 4 O 7+δ (YBC), and ultra-wide bandgap MgO (∼6.7 eV) as composite materials in this study. Compared to SDC and SDC/YBC electrolyte, the addition of MgO significantly broadens the depletion region and improves charge separation efficiency. Additionally, the ultra-wide bandgap of MgO minimizes electronic conductivity and prevents internal leakage. A fuel cell incorporating this composite electrolyte attained a peak power density of 826 mW cm −2 and an open-circuit voltage of 1.1 V at 550 °C. This represents a 12 % improvement over SDC/YBC electrolytes and a 47 % increase compared to SDC electrolytes. This study demonstrates that the SDC/YBC/MgO composite electrolyte effectively optimizes both ionic transport and interfacial stability.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mengyu Yang,Xinyue Zhang,Yawen Wang,Shilun Fu,Zhixing Yang,Qingjun Zhou
In this study, Pr 2-x Sr x NiO 4+δ (x = 0.1, 0.15, 0.2) cathode materials are synthesized via the EDTA-citric acid method, and the effects of low-strontium doping on their crystal structure, phase stability, and electrochemical performance are systematically evaluated. The results show that at a low Sr 2+ doping level, the material maintains the original K 2 NiF 4 -type structure. The results indicate that low-concentration Sr 2+ doping caused no significant change to the crystal structure of the material, while the samples with x=0.15 and x=0.2 maintain relatively good thermal stability at elevated temperatures. Meanwhile, the low content of Sr 2+ can reduce the loss of interstitial oxygen in the cathode material, this balance greatly improves the high-temperature electrical conductivity and electrocatalytic activity. The area specific resistance values of Pr 1.9 Sr 0.1 NiO 4 , Pr 1.85 Sr 0.15 NiO 4 , Pr 1.8 Sr 0.2 NiO 4 at 800 °C are 0.042 Ω cm 2 , 0.027 Ω cm 2 and 0.065 Ω cm 2 , respectively. Another crucial finding is that the maximum power densities of Pr 2-x Sr x NiO 4+δ (x = 0.1, 0.15, 0.2) in the single cells at 800 °C are 505, 598, and 310 mW cm 2 , respectively. In addition, the average thermal expansion coefficient of Pr 2-x Sr x NiO 4+δ ranges from 14.1 to 15.1×10 -6 K -1 between 30 and 1000 °C, closely matching that of conventional electrolytes. These results indicate that Pr 2-x Sr x NiO 4+δ (x = 0, 0.1, 0.15, 0.2) is a promising cathode material for solid oxide fuel cells. This work presents a research framework for optimizing Pr 2 NiO 4+δ cathodes, highlighting that low-level Sr 2+ doping balances stability and activity—both critical attributes for fuel cell materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Chuangang Yao,Jixing Yang,Sigeng Chen,Jian Meng,Kedi Cai,Qingguo Zhang
Cu doped SrFe 0.9- x Cu x W 0.1 O 3- δ ( x = 0, 0.1, 0.2 and 0.3) perovskites were investigated as SOFC cathode materials . The effects of Cu doping on properties of SFCW samples were studied systematically. The oxygen content (3- δ ) decreased by Cu doping, which leading to the decrement of electrical conductivity and the increment of TECs of SFCW samples. The ASR first decreases with x from 0 to 0.2 and then it increases when x up to 0.3. The ASR values are 0.161, 0.134, 0.102 and 0.117 Ω cm 2 at 800 °C for SFCW samples with x = 0, 0.1, 0.2 and 0.3, respectively. The corresponding activation energy are 0.90, 0.88, 0.78 and 0.86 eV. The lowest ASR and activation energy for ORR of SFCW2 is a result from the joint effects of electrical conductivity , oxygen vacancy concentration and thermal expansion caused by Cu doping. The research results obtained in this study suggesting SFCW2 is a good cathode candidate for SOFC.
研究领域:
材料科学
·
电化学
·
能源材料
·
无机非金属材料
·
固态离子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）