流化床电极热再生氨电池性能特性  

Performance of a Thermally Regenerative Ammonia-based Battery With Fluidized-bed Electrodes

作　　者：肖振翀 张永胜[1,2] 张亮 李俊[1,2] 付乾[1,2] 朱恂[1,2] 廖强[1,2] XIAO Zhenchong;ZHANG Yongsheng;ZHANG Liang;LI Jun;FU Qian;ZHU Xun;LIAO Qiang(School of Energy and Power Engineering,Chongqing University,Chongqing 400030,China;Institute of Engineering Thermophysics,Chongqing University,Chongqing 400030,China)

机构地区：[1]重庆大学能源与动力工程学院,重庆400030 [2]重庆大学工程热物理研究所,重庆400030

出　　处：《工程热物理学报》2022年第6期1660-1665,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51976018,No.52021004)。

摘　　要：物质传输对热再生氨电池性能至关重要,本文构建流化床电极来强化物质传输和提升电池性能,研究了搅拌速率、铜颗粒含量、混合电极、氨浓度和支持电解质浓度等关键参数对流化床电极热再生氨电池性能的影响。研究结果表明,在一定范围内提高搅拌速率可以强化物质传输同时增加铜颗粒与集流器的碰撞,促进了电池性能(最大功率8.2 mW)的提升;增加铜颗粒含量和构建混合电极均有效提升电化学反应面积,电池性能明显提升;随着氨浓度的增加,阳极氨传输得到进一步增强,在氨浓度为2 mol/L时,得到最大功率13.4 mW,但在高浓度(3 mol/L)时严重的氨渗透现象致使电池性能(12.4 mW)下降;在一定范围内增加支持电解质浓度降低了电池内阻使得电池性能逐渐增加。Mass transfer is significant to the performance of the thermal regenerative ammonia battery(TRAB).Fluidized-bed electrode was designed to enhance mass transfer and improve the performance of the TRAB.The effects of key parameters such as stirring rate,content of copper particle,hybrid electrode,ammonia concentration and supporting electrolyte concentration on the performance of the thermal regenerative ammonia battery using fluidized-bed electrode were studied.The results show that increasing the stirring rate within a certain range can enhance the mass transfer and increase the frequency of impact between copper particles and the collector,which can improve the maximum power(8.2 mW).Increasing the content of copper particles and the hybrid electrode can effectively enlarge the surface for electrochemical function,hence the battery performance is obviously improved.With the increase of ammonia concentration,the anode ammonia transmission is further enhanced,and the maximum power is 13.4 mW when the ammonia concentration is 2 mol/L.However,the maximum power of the TRAB(12.4 mW)decreased due to the ammonia crossover from the anode to the cathode when the ammonia concentration is 3 mol/L.Increasing the concentration of supporting electrolyte within a certain range reduces the internal resistance of the battery and leads to a gradual increase in battery performance.

关 键 词：热再生氨电池 流化床 传质 最大功率 

分 类 号：TM911.3[电气工程—电力电子与电力传动]