摘要
建立了一种以高锰酸钾溶液为滴定剂的电位滴定方法,实现了全钒氧化还原液流电池V(Ⅳ)电解液中残留草酸的定性和定量测定。结果表明,在V(Ⅳ)电解液中,用高锰酸钾溶液滴定草酸时的终点电位在1 070 mV左右,相对标准偏差小于3.6%,回收率为98.7%～104.2%。此外,基于该电位滴定方法,分析了加热过程中残留草酸含量的变化,表明加热可去除V(Ⅳ)电解液中残留草酸的可行性。为全钒氧化还原液流电池V(Ⅳ)电解液中草酸的检测和去除提供了可靠的依据。
Potassium permanganate based potentiometric titration method was established to realize the qualitative and quantitative determination of oxalic acid in vanadium electrolyte. It is shown that the end-point of potentiometric titration is about 1 070 mV, and the RSD （N =5） is no more than 3.6% and the recoveries in the range of 98.7%~104. 2%. Moreover, the changes of residual content of oxalic acid in the process of heating were analyzed based on the potential titration method. It is shown that oxalic acid can be removed from V（IV） electrolyte by heating. The proposed method can provide a reliable basis for the determination and removing of oxalic acid in V （IV） electrolyte for all vanadium redox flow battery.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第8期1339-1341,共3页
Chinese Journal of Power Sources
基金
四川省第二批应用技术研究与开发项目(2008GZ0085)
关键词
钒电池
V(IV)电解液
草酸
电位滴定
高锰酸钾
V（IV） electrolyte
oxalic acid
potentiometric titration
potassium permanganate
