Impact of Mass Transfer in the Carbon/Carbonate-Packed Bed on the Power Output of a Press-Type Direct Carbon Fuel Cell
Impact of Mass Transfer in the Carbon/Carbonate-Packed Bed on the Power Output of a Press-Type Direct Carbon Fuel Cell
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DOI：
10.1021/acs.energyfuels.9b03032
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发表时间：
2019-11
期刊：
影响因子：
5.3
通讯作者：
Hirotatsu Watanabe;T. Shimada;M. Nakanouchi;K. Hanamura
中科院分区：
文献类型：
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作者：
Hirotatsu Watanabe;T. Shimada;M. Nakanouchi;K. Hanamura
采用阻抗谱相关法研究了多孔阳极压在碳/碳酸盐填充床上的加压式直接碳燃料电池（DCFC）在不同碳负载量下的输出功率。图像分析结果表明，炭/碳酸盐固体填充床的炭填充率和炭与阳极的接触面积随初始炭负载量的增加而线性增加。DCFC的功率输出也随着初始碳负载的增加而增加，并且在初始碳负载为3.0wt%时变得几乎饱和。这一趋势与阳极侧阻抗谱相吻合。在高电流密度下，功率输出变得不稳定，并且在初始碳含量为5.0重量%时不能实现连续放电。尽管压力型DCFC被设计成通过其穿孔阳极释放气体产物，但这些产物在高电流密度下可能仍然保留在阳极周围。填充床中碳颗粒之间的空间W。
The power output of a press-type direct carbon fuel cell (DCFC) with the perforated anode pressed on the carbon/carbonate-packed bed was studied by correlation with impedance spectroscopy at different carbon loads. Image analysis of the solidified carbon/carbonate-packed bed showed that the filling ratio of the carbon and the contact area between the carbon and anode linearly increased as the initial carbon load increased. The power output of the DCFC also increased with increasing the initial carbon load, and became almost saturated at an initial carbon load of 3.0 wt%. This trend coincided with the anode side impedance spectra. At high current densities, the power output became unstable, and a continuous discharge could not be achieved at an initial carbon content of 5.0 wt%. Although the press-type DCFC is designed to release gas products through its perforated anode, those products likely still remained around the anode at high current densities. Spaces between the carbon particles in the packed bed w...