具有嵌入式流道的贯穿电极热再生电池性能特性

Performance of Thermally Regenerative Batteries Using Flow-through Porous Electrodes With Embedded Flow Channels

多孔电极内物质传输对热再生电池性能至关重要,而传质较佳的穿透电极内仍然存在物质分布不均,为此构建嵌入式流道以强化物质均匀分布和传输。本文研究了嵌入式流道形式及数量、电解液流量对穿透电极热再生电池物质传输及产电性能的影响。研究结果表明,由于交错型流道具有较佳的物质传输和较均匀的物质分布,电池获得了最高功率(10.0 mW)、最大产电量(1929.1 C)和最高的相对卡诺效率(10.2%)。在一定范围内交错型流道数量越多致使物质分布越均匀,电池最大功率越高。此外,电池最大功率随着电解液流量的增加逐渐增大,但增大速率逐渐减小,最佳电解液流量为30 mL/min。

Mass transfer in porous electrode is important for the performance of thermally regenerative batteries.Embedded flow channels were applied to enhance the mass uniform distribution and transfer in thermally regenerative batteries using flow-through porous electrodes.In this study,the effects of the type of flow channel,the number of flow channels and the flow rate of electrolyte on the mass transfer and power generation of batteries were investigated.The results showed that the maximum power(10.0 mW),maximum total discharge(1929.1 C)and maximum relative Carnot efficiency(10.2%)were obtained due to the better mass transfer and more uniform material distribution in the interdigitated electrode channel.In a certain range,the maximum power of the battery increases with the increase of the number of electrode interdigitated channels,resulting from the enhanced mass uniform distribution.In addition,with the increase of electrolyte flow,the maximum power of the battery showed an upward trend,and the increase rate gradually decreased.The optimal electrolyte flow was 30 mL/min.