RARE METALS
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2025
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IF 11
Luo Jun,Ke Yan-Dong,Li Qi-Yue,Tian Ying-Fa,Dong Bing-Hai,Yan Dong,Li Jian,Li Oi-Lun,Jia Li-Chao
Ethylene (C 2 H 4 ) is conventionally produced by a high energy-consumption process based on the steam cracking of ethane (C 2 H 6 ). In contrast, we presented a novel symmetrical solid oxide fuel cell (SOFC) to co-produce electricity and C 2 H 4 through C 2 H 6 dehydrogenation. The symmetrical cell contains a thin BaZr 0.1 Ce 0.7 Y 0.2 O 3 (BZCY) electrolyte sandwiched between two thicker (PrBa) 0.95 (Fe 0.7 Ni 0.2 Cu 0.1 ) 1.8 Mo 0.2 O 6- δ impregnated BZCY (PBFNCM-BZCY) electrodes. The as-synthesized reduced-PBFNCM (R-PBFNCM) contained Fe–Ni–Cu alloy particles embedded on a double-perovskite matrix uniformly, while the electrode showed high oxygen vacancy concentration, electronic conductivity, redox stability, and activity for C 2 H 6 dehydrogenation with improved ethylene selectivity. The symmetrical cell demonstrated a peak power density of 409 mW cm −2 using C 2 H 6 as fuel, accompanying with a C 2 H 6 conversion of 51.2%, a C 2 H 4 selectivity of 92.5%, and a C 2 H 4 yield of 47.4% at 750 °C and 750 mA cm −2 . Despite carbon deposition occurred slowly in the anode, the deposited carbon was removed by simply switching C 2 H 6 and air between electrodes. Consequently, the cell voltage and C 2 H 4 yield recover by 91.4% and 98.1%, respectively, after three switches with an interval of 48 h, suggesting that the symmetrical SOFC is a promising solution for long-term continuous electricity and C 2 H 4 co-production by C 2 H 6 dehydrogenation. Graphical
研究领域:
能源材料科学
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化学工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Tianqing Zhao,Jinkun Tan,Wanglin Zhou,Zhenbin Gu,Yongqiang Niu,Zhengkun Liu,Guangru Zhang,Wanqin Jin
BaZr 0.7 Ce 0.2 Y 0.1 O 3-δ (BZCY), a perovskite-type mixed protonic and electronic conducting oxide , holds significant potential for H 2 separation and purification as a membrane. The introduction of a porous modification layer as an exchange-active component offers a potential solution to enhance H 2 permeability. However, achieving the desired porous/dense structure presents a notable challenge for practical implementation. In this study, various methods were developed to address sintering kinetics, encompassing both chemical aspects (e.g., interlayer reactions) and physical factors (e.g., thermal expansion), for fabricating a porous BZCY modification layer on a 4-channel BZCY hollow fiber membrane. The optimal composite hollow fiber membrane , resulting from a combination of readily sintered hollow fiber and powders for constructing the porous layers , exhibits an exceptional H 2 permeation flux of 0.48 mL min −1 cm −2 at 900 °C using 50 % H 2 /N 2 as the feed gas, which represents a threefold increase compared to the performance of the bare BZCY membrane. The H 2 permeation flux stabilized at 0.52 mL min −1 cm −2 for 500 h under water vapor conditions. These findings enabled us to identify the most effective approach, unlocking the full potential of surface-modified hollow fiber membranes and advancing their capabilities in H 2 permeation applications.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Jiaxuan Chen,Xuanlin Lu,Jian Zhang,Xin Zhao,Wen Liu,Jinpeng Zhang,Tianqi Shao,Yicheng Zhao,Yongdan Li
Slurry spin coating is an effective approach for the fabrication of protonic ceramic electrolyte thin films. However, weak adhesion between the electrode and spin-coated electrolyte layers in electrochemical cells due to the low sinterability of the proton-conducting perovskite materials usually lead to a high interfacial resistance and thus a low performance. Herein, we report a method to improve the interfacial connection and boost the performance of protonic ceramic cells based on a BaZr0.1Ce0.7Y0.2O3−δ (BZCY) electrolyte. Ni-BZCY anode functional layer, BZCY electrolyte layer and La0.6Sr0.4Co0.2Fe0.8O3−δ-BZCY cathode functional layer are all fabricated by slurry spin coating. The electrode functional layers and the components of the electrolyte slurry influence the microstructure of the single cell and the kinetics of the electrochemical processes significantly. A peak power density of 2345 mW cm–2 is achieved at 700 °C in the fuel cell mode, and a current density of –3.0 A cm–2 is obtained at an applied voltage of 1.3 V in the electrolysis mode.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Fangjie Liu,Zhiyang Guo,Zaifu Gong,Haizhao Li,Wuhui Li,Yuliang Liu,Qingjie Wang
In this study, xBaZr 0.1 Ce 0.7 Y 0.2 O 3-δ (BZCY)-PrO 2 (where x represents the ratio of BZCY to PrO 2 , x = 20, 10, 5) composite powders were synthesized via an in-situ exsolution method. These powders were then mixed with La 0.8 Sr 0.2 Co 0.2 Fe 0.8 O 3-δ (LSCF) to fabricate LSCF-xBZCY-PrO 2 nanocomposite cathodes for protonic ceramic fuel cells (PCFCs). Consequently, the cathode with x = 10 demonstrated the optimal electrochemical performance, achieving a low polarization resistance ( R p) of 0.268 Ω cm 2 and a peak power density (PPD) of 0.52 W cm −2 at 650 °C, outperforming both the LSCF-20BZCY-PrO 2 and LSCF-5BZCY-PrO 2 cathodes. These values represent a significant improvement compared to conventional LSCF-BZCY cathodes ( R p = 0.506 Ω cm 2 , PPD = 0.338 W cm −2 ). Furthermore, the LSCF-10BZCY-PrO 2 cathode demonstrated excellent short-term stability under working conditions and operated continuously for 100 h. XPS, EIS, and DRT analyses revealed that the enhanced performance is primarily attributed to the improved oxygen reduction reaction (ORR) kinetics, facilitated by the incorporation of PrO 2 elements and the formation of a nanostructured morphology. This work presents a simplified and effective strategy for developing high performance nanocomposite multiphase cathodes for PCFCs, offering valuable insights into their practical application.
研究领域:
电化学
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材料科学
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能源材料
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固体氧化物电化学
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燃料电池技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Donggang Wang,Tong Zheng,Haibin Sun,Xiaoyu Zhang,Xue Guo,Qiangqiang Hu,Yurun Feng
Grain boundary resistance is one of the main factors inhibiting the electrical properties of BaZr 0.1 Ce 0.7 Y 0.2 O 3-δ (BZCY) proton conduction electrolytes for solid oxide fuel cells (SOFCs). The Cu-doping strategy is applied to improve the electrical performance of grain boundary by promoting the grain growth and reducing the grain boundary blocking effect. For BaZr 0.1 Ce 0.7 Y 0.2-x Cu x O 3-δ (BZCYCu x , x = 0, 0.025, 0.050, 0.075, 0.100), the largest average grain size is 11.64 μm, which is approximately 5 times that of the BZCY electrolyte without Cu doping (2.13 μm). The optimized electrical performance is 1.64 × 10 −2 S cm −1 at 700 °C in moist air, which is twice that of BZCY. This is mainly attributed to the enhanced grain boundary conductivity by appropriate Cu doping, while BZCYCu 0.075 has the highest w / d g (0.733) and a relative low Δ φ (0) (0.201). The anode-supported cell shows a peak power density of 810 mW cm −2 at 700 °C in moist H 2 (as fuels) and ambient air (as oxidants).
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
·
IF 5.6
Wenzhao Wei,Donggang Wang,Haibin Sun,Fangyong Yu,Xue Guo,Qiangqiang Hu,Yurun Feng,Hongli He,Xin Kong
Medium-entropy BaZr 0.1 Ce 0.5 Y 0.2 Dy 0.2 O 3-δ (BZCYD) electrolytes with a configurational entropy of 1.22 R are prepared by doping Dy element into low-entropy BaZr 0.1 Ce 0.7 Y 0.2 O 3-δ ( BZCY, 0.80 R). The entropy increasing strategy makes dramatically contribution to the improved chemical stability against CO 2 and H 2 O, and the relevant mechanism is clarified by the density functional theory (DFT). The BZCYD electrolyte shows stable phase composition and micro-structure after CO 2 heat treatment at 700 °C for 3 h and H 2 O treatment boiled for 3 h, while generation of impurities of BaCO 3 and Ba(OH) 2 accompanied by destroyed micro-structure are formed in the BZCY electrolyte under the same conditions. The total conductivity decay rates of BZCYD electrolyte after CO 2 heat treatment and H 2 O treatment are 44.1 % and 52.5 %, respectively, which exhibit significantly better than those of BZCY electrolyte (88 % and 74 %). According to the first-principles calculation, BZCYD electrolyte has higher CO 2 reaction energy barrier (5.21 eV) and H 2 O reaction energy barrier (7.30 eV), as well as lower CO 2 adsorption energy (−5.182 eV) and H 2 O adsorption energy (−0.742 eV), so it has better chemical stability. The peak power density of the anode-supported single cell with BZCYD electrolyte is 510 mW cm −2 at 700 °C in humid H 2 .
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
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