Preparation And Output Of Anode-supported Micro Tubular Solid Oxide Fuel Cell And Small-sized Stacks

Anode-supported microtubular solid oxide fuel cell(MT-SOFC)was paid more attention due to its small size,high mechanical strength and electrical conductivity,as well as a big heat and mass transfer surface.In this dissertation,anode hollow fiber tubes with special pore structure was prepared by the phase-inversion technique.The single cell and the small-sized stacks were assembled in parallel mode and electrochemical performances were tested.The anode hollow fiber micro tubes(Ni O-YSZ)were prepared based on phase-inversion method,and then the electrolyte(YSZ)and cathode(LSM-YSZ)was obtained by means of dip-coating and sintering to form anode-supported MT-SOFC.The maximum power densities of single MT-SOFC are 395.6m W·cm-2,525.5 m W·cm-2,848.3 m W·cm-2 and the polarization resistances were3.33 ?·cm2,2.88 ?·cm2,1.09 ?·cm2 at the operating temperature of 750 o C,800 oC,850 o C,respectively.The single cell was assembled into the small-sized stacks and tested the total output at the different temperature.The maximum output power were 60.49 m W,46.89 m W,210.91 m W and 400.85 m W at 750 o C when the number of parallel connecting small stacks was 2,3,4,and 5,respectively.In addition,the total output power increases with enhancing operation temperature and the number of cells in stacks.But it was noted that the maximum output power of three-cell stacks was obviously lower than that of the two-cell stacks,ascribing to short circuit of the single cell in stacks.What's more,the three-layer structure still remains intact between the electrode and electrolyte layers,indicating the high stability of the cell.These indicate that the prepared anode-supported MT-SOFC and its stacks show good electrochemical performance.