A comparison of sodium borohydride as a fuel for proton exchange membrane fuel cells and for direct borohydride fuel cells
A comparison of sodium borohydride as a fuel for proton exchange membrane fuel cells and for direct borohydride fuel cells
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DOI：
10.1016/j.jpowsour.2006.01.036
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发表时间：
2006-04
影响因子：
9.2
通讯作者：
Jung‐Ho Wee
中科院分区：
文献类型：
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作者：
Jung‐Ho Wee
使用NaBH4水溶液作为燃料的燃料电池系统有两种：氢/空气质子交换膜燃料电池（PEMFC），其在阳极使用通过NaBH4水解反应（B-PEMFC）产生的现场H2；以及直接硼氢化物燃料电池（DBFC）系统，其直接在阳极使用NaBH4水溶液，在阴极使用空气。最近，由于这种液体燃料对于便携式应用的燃料电池系统具有多种优点，对这两种类型的燃料电池的研究开始引起人们的兴趣。因此，现阶段评估两种燃料电池的相对竞争力可能是有意义的。考虑到目前的技术水平和NaBH4的高价格，本文对影响各类型燃料电池相对受欢迎程度的因素进行了评估和分析。它们的相对竞争力很大程度上取决于 NaBH4 交叉的程度。当考虑 DBFC 系统的交叉时，B-PEMFC 系统的总成本在燃料电池系统中最具竞争力。另一方面，如果要完全克服交叉问题，产生六个电子的DBFC系统（6e-DBFC）的总成本将与B-PEMFC系统非常相似。如果能够克服交叉问题，产生八个电子的 DBFC 系统（8e-DBFC）将变得更具竞争力。然而，在这种情况下，DBFC消耗的NaBH 4 水溶液的体积大于B-PEMFC消耗的NaBH 4 水溶液的体积。
Two types of fuel cell systems using NaBH4aqueous solution as a fuel are possible: the hydrogen/air proton exchange membrane fuel cell (PEMFC) which uses onsite H2generated via the NaBH4hydrolysis reaction (B-PEMFC) at the anode and the direct borohydride fuel cell (DBFC) system which directly uses NaBH4aqueous solution at the anode and air at the cathode. Recently, research on these two types of fuel cells has begun to attract interest due to the various benefits of this liquid fuel for fuel cell systems for portable applications. It might therefore be relevant at this stage to evaluate the relative competitiveness of the two fuel cells. Considering their current technologies and the high price of NaBH4, this paper evaluated and analyzed the factors influencing the relative favorability of each type of fuel cell. Their relative competitiveness was strongly dependent on the extent of the NaBH4crossover. When considering the crossover in DBFC systems, the total costs of the B-PEMFC system were the most competitive among the fuel cell systems. On the other hand, if the crossover problem were to be completely overcome, the total cost of the DBFC system generating six electrons (6e-DBFC) would be very similar to that of the B-PEMFC system. The DBFC system generating eight electrons (8e-DBFC) became even more competitive if the problem of crossover can be overcome. However, in this case, the volume of NaBH4aqueous solution consumed by the DBFC was larger than that consumed by the B-PEMFC.