摘要
构建采用阴/阳极通流的穿透电极型热再生氨电池(Thermally Regenerative Ammonia-based Battery,TRAB),并研究了电解液/氨流量比、氨浓度、电极孔隙和支持电解质浓度对电池性能的影响。结果表明,电解液/氨流量比过低会导致氨渗透,恶化阴极性能,进而降低电池性能:通过增大流量比,可加强传质提升电池功率。一定流量比下,随氨浓度增加,电池性能逐渐提升,但过高浓度会引起氨渗透,恶化电池性能。电极孔隙密度越大,电极反应表面积越大,电池性能提升。随硫酸铵浓度增大,电解质电导率不断增大,电池性能逐渐提升,在高浓度(>2 mol·L^(-1))下,浓度增大对电池性能提升不明显。
A sequential cathode-anode thermally regenerative ammonia-based battery(TRAB)with flow-through electrodes was proposed,and the effects of flow rate ratio of electrolyte and ammonia,ammonia concentration,electrode pore density and the support electrolyte concentration on the battery performance were studied.The results showed that much lower flow rate ratio of electrolyte and ammonia led to ammonia cross-over from anode to cathode,which deteriorated the performance of cathode and thus reduced the power density of the TRAB.The performance of the TRAB was improved by the enhanced mass transfer with the increase of flow rate ratio of electrolyte and ammonia.At a certain flow rate ratio of electrolyte and ammonia,the battery performance gradually improved with the increase of ammonia concentration.It was worth noting that much higher concentration of ammonia could lead the ammonia cross-over and worsen the battery performance.As the pore density of electrode continued to increase,the battery performance gradually improved,which was owning to the increased total surface area of the electrochemical reaction induced by the decreased pore size.With the increase of ammonium sulfate concentration,the battery performance was gradually improved by the increased conductivity of electrolyte,but at a high concentration of(NH_(4))_(2)S0_(4)(>2 mol·L^(-1)),the performance improvement was not significant.
作者
张永胜
张亮
李俊
付乾
朱恂
廖强
石雨
ZHANG Yong-Sheng;ZHANG Liang;LI Jun;FU Qian;ZHU Xun;LIAO Qiang;SHI Yu(Key Laboratory of Low-grade Energy Utilization Technologies and Systems,Ministry of Education,Chongqing 400030,China;Institute of Engineering Thermophysics,Chongqing University,Chongqing 400030,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2021年第12期3274-3280,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金面上项目(No.51976018)
重庆市基础科学与前沿技术项目(No.cstc2017jcyjAX0203)
重庆市留学人员创业创新支持计划创新资助重点项目(No.cx2017020)
中央高校基本科研业务费(No.10611 2016CDJXY 145504)
低品位能源利用技术及系统教育部重点实验室固定人员科研基金资助(No.LLEUTS-2018005)
关键词
热再生氨电池:通流
电化学:传质:渗透
多孔介质
thermally regenerative ammonia-based battery
flow-through
electrochemistry
mass transfer
crossover
porous media
