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HYDROGEN SULFIDE SOLID-OXIDE FUEL CELL USING PROTON-CONDUCTING ELECTROLYTES

ZHONG Li ;CHEN Jianjun;WEI Guolin;LUO Jingli ;CHUANG Karl   

  • Online:2004-10-25 Published:2004-10-25

固体氧化物质子传导膜H2S燃料电池

钟理;陈建军;WEI Guolin;LUO Jingli ;CHUANG Karl   

  1. 华南理工大学化工学院,广东 广州 510640;阿伯塔大学化学工程与材料工程系,阿伯塔省 T6G 2G6,加拿大

Abstract: A brief overview of the past and present state of art in the field of H2S solid oxide fuel cell is presented.Electrochemical performance of a proton-conducting solid oxide fuel cell having the configuration of H2S,(MoS2+NiS)/Li2SO4-Al2O3/Pt,air was investigated.The experimental results showed that electrolyte materials like Li2SO4-Al2O3, and anode substances such as MoS2+NiS showed good chemical stability under the operating conditions of a fuel cell using H2S as the fuel, and that binary metal sulfides such as MoS2+NiS as an anode catalyst was superior to a single metal sulfide of MoS2 which sublimes above 450 ℃, and better than Pt which could be detached and resulted in the degradation of anode due to the formation of PtS.The proton-conducting and cell performance was improved at elevated temperatures due to the increase of electrochemical reaction rate and the reduction of cell resistance.OCV values around 1.0 V were observed.The maximum current and power density values obtained at 600 ℃ were 20 mA•cm-2 and 4 mW• cm-2, and as high as 200 mA• cm-2 and 55 mW• cm-2 were achieved at 700 ℃, respectively.Three different anode catalysts, Pt, MoS2+NiS and MoS2+NiS+Ag were described.The conductance of cell increased and the cell performance was improved with Ag powder added to anode catalysts.Current density up to 250 mA• cm-2 and power density up to 70 mW• cm-2 were achieved with the anode catalyst MoS2+NiS+Ag compared to those with MoS2+NiS at 700 ℃.