全钒液流电池的稳态充电数值模拟  

Numerical simulation of all-vanadium redox flow battery steady-state charging

作　　者：廖斯达[1] 宋士强[1] 张剑波[2] 王保国[1] 

机构地区：[1]清华大学化学工程系化学工程联合国家重点实验室,北京100084 [2]清华大学汽车工程系汽车安全与节能国家重点实验室,北京100084

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第2期203-207,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(21276134);国家"863"计划基金资助项目(2012AA051203);国家"973"计划基金资助项目(2010CB227202)

摘　　要：为研究大容量蓄电储能全钒液流电池的充电能力,建立基于电池内部传递与反应相耦合的机理模型,模拟电池二维、等温、稳态、充电的状态,得到电池极化的比重数据,并从机理出发深入分析极化的主要来源.通过数值模拟碳毡电极电导率对电极过程的影响,给出反应区域的二维分布特点及规律.研究结果表明:欧姆极化约占总极化电压的50%,浓差极化约占30%,动力学极化占20%;反应区域的分布与多孔电极电导率及电解液电导率的相对大小有关,电流总是选择电阻较小的方式传导.In order to study the charging capacity of the all-vanadium redox flow battery（VRFB） for massive energy storage,this paper built a mechanism model based on the coupling of the battery internal transportation and reaction,simulated the case of 2D,isothermal,steady-state and charging of VRFB,obtained the polarization proportion data of the battery,and analyzed the sources of the polarization.The characteristic and laws of two-dimensional distribution in the reaction zone is given by numerical simulating of the impact of carbon felt electrode conductivity on the electrode process.The result of study shows that the ohmic polarization takes up about 50% of total polarization voltage,the concentration polarization takes up 30% and dynamics polarization takes up 20%.The distribution of reaction zone depends on the relative size of porous electrode and electrolyte conductivity,and current always chooses the conduction with lower resistance.

关 键 词：全钒液流电池 数值模拟 多孔介质 实验验证 压缩比 

分 类 号：TQ152[化学工程—电化学工业]