Browsing by Author "Zhang, Jinpeng"

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Interfacial Modification for High-Efficient Reversible Protonic Ceramic Cell with a Spin-Coated BaZr0.1Ce0.7Y0.2O3−δ Electrolyte Thin Film
(2024-10-02) Chen, Jiaxuan; Lu, Xuanlin; Zhang, Jian; Zhao, Xin; Liu, Wen; Zhang, Jinpeng; Shao, Tianqi; Zhao, Yicheng; Li, Yongdan
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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.
La0.7Sr0.3Fe0.9Ni0.1O3−δ-Ce0.8Sm0.2O2−δ Composite Cathode with a Hollow Nanofiber Structure Prepared through Coaxial Electrospinning for Protonic Ceramic Fuel Cells
(2024-11-11) Zhao, Xin; Liu, Wen; Zhang, Jian; Lu, Xuanlin; Chen, Jiaxuan; Shao, Tianqi; Zhang, Jinpeng; Zhao, Yicheng; Li, Yongdan
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Rational design of the electrode microstructure is an important strategy to improve the performance of solid oxide fuel cells. Electrospinning is an effective approach for the production of electrode materials with a nanofiber microstructure, which provides straight and continuous pathways for ionic and electronic conduction. In this study, the self-assembled La0.7Sr0.3Fe0.9Ni0.1O3−δ (LSFN)-Ce0.8Sm0.2O2−δ (SDC) composite with a hollow nanofiber structure is synthesized as the cathode material of protonic ceramic fuel cells (PCFCs) through a coaxial electrospinning process. LSFN and SDC are both distributed uniformly in the composite cathode. Compared with composite cathodes prepared through electrospinning with solid and core-shell nanofiber structures, the hollow-fiber LSFN-SDC cathode shows a higher specific surface area and provides more channels for gas diffusion, both of which are beneficial for the oxygen reduction reaction. The LSFN-SDC composite cathode with the hollow fiber structure exhibits the lowest polarization resistance of 0.035 Ω cm2 at 700 °C. A PCFC with that cathode shows a maximum power density of 1598 mW cm-2 and a promising short-term stability at 700 °C.