A liquid Sb anode direct carbon fuel cell (DCFC) was fabricated on a smooth single crystal YSZ electrolyte (Ra=0.67nm) substrate with porous Pt cathode to reveal the intrinsic reaction kinetics of electrochemical oxidation of liquid Sb in battery mode and the reduction characteristic of Sb_2O_3 in carbon fuel mode using Taixi de-ash coal. The reduction kinetics of Sb_2O_3 with the de-ash coal was obtained using a temperature programmed reaction testing system. The intrinsic exchange current density of the liquid Sb anode is 15A m~(-2). The reaction kinetics of the Sb_2O_3 with the de-ash coal can be enhanced by decreasing the coal particle size, and by adding de-ash coal into the anode chamber, the performance can be improved and kept stable. Since Sb_2O_3 is an oxygen ion conductor, the performance can be enhanced in the beginning. The distribution of Sb/Sb_2O_3 at the anode has important effects on the liquid Sb DCFC performance.
展开▼
