Performance Characteristics of Liquid Antimony Anode Direct Carbon Fuel Cell

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 Sb2O3 in carbon fuel mode using Taixi de-ash coal. The reduction kinetics of Sb2O3 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 Sb2O3 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 Sb2O3 is an oxygen ion conductor, the performance can be enhanced in the beginning. The distribution of Sb/Sb2O3 at the anode has important effects on the liquid Sb DCFC performance.