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Study of sintered stainless steel fiber felt as gas diffusion backing in air-breathing DMFC

机译:study of sintered stainless steel fiber felt as gas diffusion backing in air-breathing DmFC

摘要

Adoption of a sintered stainless steel fiber felt was evaluated as gas diffusion backing in air-breathing direct methanol fuel cell (DMFC). By using a sintered stainless steel fiber felt as an anodic gas diffusion backing, the peak power density of an air-breathing DMFC is 24 mW cm(-2), which is better than that of common carbon paper. A 30-h-life test indicates that the degraded performance of the air-breathing DMFC is primarily due to the water flooding of the cathode. Twelve unit cells with each has 6 cm(2) of active area are connected in series to supply the power to a mobile phone assisted by a constant voltage diode. The maximum power density of 26 mW cm(-2) was achieved in the stack, which is higher than that in single cell. The results show that the sintered stainless steel felt is a promising solution to gas diffusion backing in the air-breathing DMFC, especially in the anodic side because of its high electronical conductivity and hydrophilicity. (C) 2004 Elsevier B.V. All rights reserved.
机译:在空气直吹式甲醇燃料电池(DMFC)中,采用烧结的不锈钢纤维毡作为气体扩散的支持材料。通过使用烧结的不锈钢纤维毡作为阳极气体扩散背衬,透气DMFC的峰值功率密度为24 mW cm(-2),比普通复写纸更好。 30小时寿命测试表明,空气呼吸DMFC的性能下降主要归因于阴极注水。串联连接的十二个单元电池每个都有6 cm(2)的活动区域,以借助恒压二极管为移动电话供电。在堆栈中实现了26 mW cm(-2)的最大功率密度,这比单个电池中的最高。结果表明,烧结的不锈钢毡由于其高的电导率和亲水性,是在空气呼吸DMFC中,特别是在阳极侧中,作为气体扩散衬里的有前途的解决方案。 (C)2004 Elsevier B.V.保留所有权利。

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