阳极支撑型单气室固体氧化物燃料电池的性能

 使用浆料旋涂法制备了致密氧化钇稳定的氧化锆电解质薄膜,进而组装成阳极支撑型单气室固体氧化物燃料电池. 该电池在CH4, N2和O2混合气氛下运行,可产生很高的输出性能. 在700 ℃时开路电压达到1 V, 最大功率密度达到398 mW/cm2. 在开路状态下,电池的欧姆电阻为0.097 Ω·cm2, 仅为电极阻抗的6.4%, 远小于电极极化电阻. 通过优化电极材料,阳极支撑型单气室固体氧化物燃料电池将具有更优异的输出性能和更广阔的应用前景.     

Fano Effect and Anti-Resonance Band in a Parallel-Coupled Double Quantum Dot System with Two Multi-Quantum Dot Chains

A parallel-coupled double quantum dot(PCDQD) system with two multi-quantum dot chains is designed. Conductance versus Fermi energy level is investigated utilizing the non-equilibrium Green's function approach. If two quantum dots are added on each side of the PCDQD system, additional Breit–Wigner and Fano resonances occur in the conductance spectra. If quantum dots are added on one side of the system, small Fano resonances can be observed in the conductance spectra. Adjusting the number of side-coupled quantum dots, the anti-resonance bands emerge at different positions, which makes the system applicable as a quantum switching device. Moreover,the I–V characteristic curve presents the step characteristic and the width of the step decreases with increasing the number of side-coupled quantum dots.