QQ客服 官方微博 反馈留言

	液流电池理论与技术——全钒液流电池的数值模拟分析
	廖斯达 ; 宋士强 ; 张剑波 ; 王保国 ; LIAO Sida ; SONG Shiqiang ; ZHANG Jianbo ; WANG Baoguo
	2016-03-30 ; 2016-03-30
关键词	全钒液流电池 数值模拟 多孔介质 电极结构 压缩比 all-vanadium redox flow battery numerical simulation porous media electrode structure compression ratio TM912
其他题名	Simulation of the effects of electrode parameters on all-vanadium redox flow battery performance
中文摘要	以全钒液流电池为研究对象,利用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、稳态条件下,电池充电过程电极参数对电池内部极化的影响规律,包括碳毡电极的几何结构参数(厚度Lt和压缩比CR)、电学特性参数(比表面积a和电导率σs)和操作参数(充电电流密度i)的影响。数值模拟结果给出Lt从1.5 mm增至3.5 mm,端电压仅降低3 mV;CR从0.1增至0.5,端电压降低16 mV;a从3.5×104 m2/m3增至3.5×106 m2/m3,端电压降低30 mV;σeff s从18.9 S/m增至164.4 S/m,端电压降低87 mV,并给出多孔电极内部过电势在不同σeff s条件下不同的二维分布特点;i从100 mA/cm2增至150 mA/cm2,端电压增大57 mV,若同比增大比表面积a,则端电压只增大46 mV。将数值模拟与宏观实验相对比,取得良好的一致性,表明了数值模拟与分析的可靠性。通过增大CR、a、σeff s可以明显提高电池性能,为进一步提高电极材料的性能、设计电极结构参数、选择操作参数提供了重要依据。; In order to study the all-vanadium redox flow battery(VFB), a mechanistic model is developed based on the transport and reactions to simulate the effects of various electrode parameters on the battery's overall performance and internal polarizations for a VFB charged at isothermal and steady state. The parameters included the carbon felt's geometry structure parameters(thickness Lt, Compression ratio CR), electrical parameters(specific surface area a, electric conductivity σs) and operating parameter(charging current density i). Numerical simulations showed that when Lt increased from 1.5 mm to 3.5 mm, the terminal voltage drop is 3 mV only; when CR increased from 0.1 to 0.5, the terminal voltage drop is 16 mV; when a increased from 3.5×104 m2m–3 to 3.5×106 m2m–3, the terminal voltage drop is 30 mV; wheneff–1s increased from 18.9 Sm to 164.4 Sm–1, the terminal voltage drop is 87 mV, and results also showed different two-dimensional over-potential distribution characteristics under different σseff ; when i increased from 100 mAcm–2 to 150 mAcm–2, the terminalvoltage increase is 57 mV, if proportionally increased a, the terminal voltage increase is 46 mV only. Based on the terminal voltage and the over-potential distribution, the reasons for the effects of various parameters on the battery performance are discussed. The experimental validation showed similar results, which proved the reliability of the numerical simulation. Increasing CR, a and σseffwill significantly improve the battery performance. This should provide guidance to parameter design and to improve the performance of electrode material, and the improving of battery performances.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144093]
专题	清华大学
推荐引用方式 GB/T 7714	廖斯达,宋士强,张剑波,等. 液流电池理论与技术——全钒液流电池的数值模拟分析[J],2016, 2016.
APA	廖斯达.,宋士强.,张剑波.,王保国.,LIAO Sida.,...&WANG Baoguo.(2016).液流电池理论与技术——全钒液流电池的数值模拟分析..
MLA	廖斯达,et al."液流电池理论与技术——全钒液流电池的数值模拟分析".(2016).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。