Ammonia Modification of Carbon Felt Cathode of Marine Sediment Microbial Fuel Cell and its Electrochemical Performance
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摘要: 在不同温度（650℃、800℃、950℃）下对碳毡阴极进行氨气热处理，比较改性前后海底微生物燃料电池（MSMFCs）阴极的电化学性能。其中950℃改性阴极的电容密度（172.53 F/cm2）是Blank组的3.03倍，交换电流密度是空白组的1.53倍，说明950℃氨气改性后阴极的抗极化能力更高；电荷转移电阻（34.09Ω）为Blank （90.96Ω）组的0.37倍，输出功率密度（569 mW/m2）为Blank组（337 mW/m2）的1.69倍。故950℃氨气处理碳毡阴极具有最佳的氧还原反应速率。。Abstract: The carbon felt cathodes are subjected to ammonia heat treatment at different temperatures(650 ℃, 800 ℃and 950 ℃) to investigate the electrochemical performances of the cathodes in marine sediment microbial fuel cells(MSMFCs) before and after modification. The capacitance density(172.53 F/cm2) of the cathodes modified at 950 ℃ is 3.03 times of that of the blank group, and its exchange current density 1.53 times of that of the blank group, indicating that its anti-polarization ability is improved by modification. Meanwhile its charge transfer resistance(34.09 Ω) is 0.37 times of that(90.96 Ω) of the blank group, its output power(569 mW/m2) is 1.69 times of(337 mW/m2) that of the blank group. According to the results, the 950 ℃ ammonia gas modified carbon felt cathode has the best oxygen reduction reaction(ORR) rate.
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