全钒液流电池电解液流场结构优化设计  

Optimal design of electrolyte flow fields for all Vanadium redox flow battery

作　　者：陈金庆 王保国[2] 吕宏凌[1] 

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266555 [2]清华大学化学工程系,北京100084

出　　处：《现代化工》2011年第9期52-55,共4页Modern Chemical Industry

基　　金：国家"863"计划项目(2007AA05Z245);国家自然科学基金资助项目(20876086)

摘　　要：全钒液流电池电解液流场结构合理可使电流密度、钒电解液分布均匀,降低极化,提高电池性能。设计3种不同的电解液流场,研究流场结构对电池极化、充放电电流电压、功率密度和能量效率的影响。结果表明蛇形流场结构简单且易于加工,可使钒电解液均匀分布,增强电解液对流传质能力,能较充分利用钒电解液储能容量,电池的输出功率密度最高可达31.6 mW/cm2,与传统平行流场相比,电池电流效率提高13.9%,电压效率提高6.3%,能量效率提高14.8%,放电容量提高了35.3%。An excellent flow field structure of electrolyte in all vanadium redox flow battery （VRB） can bring about the uniform distribution of current density and electrolyte species for decreased polarization and improved performance. Three kinds of flow field structure are designed to evaluate the influence of the inner structure on battery polarization, current and voltage during charging and discharging, output power density and energy efficiency in this paper. The results show that the parallel-serpentine field with simple structure and easy machining leads to the uniform distribution of electrolyte species and intensifies the convection transfer of the species. The flow field enhances the electrolyte availability in storage capacity with the maximum output power density of 31.6 mW/cm2. Compared with the conventional parallel flow field, the current efficiency, voltage efficiency and energy efficiency of the battery with the serpentine flow field are improved by 13.9% ,6. 3% , and 14. 8% ,respectively. The discharge capacity is increased by 35.3%.

关 键 词：全钒液流电池(VRB) 流场结构 优化设计 蛇形流场 电池性能 

分 类 号：TM911.49[电气工程—电力电子与电力传动] TQ135.11[化学工程—无机化工]