Solid state electrochemistry of direct carbon/air fuel cells
In direct carbon fuel cells (DCFCs), elemental carbon is electrochemically oxidised to generate electrical power. Carbon is readily available, easily transported and stored and, therefore, affordable to the global energy economy. Further operational advantages include the use of fully renewable solid bio-carbon fuel sources and the opportunity for scale-up. Herein we discuss a DCFC which utilises a molten mixed alkali metal carbonate eutectic as a secondary electrolyte, contained within a solid oxide fuel cell. The operation of small cells working as semi-fuel cells has been successfully demonstrated over an extended temperature range (525-900℃) using a range of carbons derived from fossil, renewable and waste sources. Preliminary mechanistic studies demonstrate open circuit voltages (OCVs) well in excess of 1 V and indicate that direct oxidation and Boudouard conversion both contribute to the conversion process, with the dominant process changing with both temperature and extent of molten electrode/electrolyte component.
Fuel cell Carbon SOFC MCFC Anode Electrolyte
Sneh L.Jain Yuta Nabae Barry J.Lakeman Kevin D.Pointon John T.S.Irvine
School of Chemistry, University of St Andrews, Fife KY16 9ST, UK Dstl Porton Down, Salisbury, Wilts.SP4 OQR, UK
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1417-1421
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）