钒电池电解液中不同价态钒的分光光度分析  

Spectrophotometry Analysis of Different Valence State of Vanadium in Vanadium Battery Electrolyte

作　　者：陈富于[1] 陈晖[2] 侯绍宇[2] 刘建国[1] 严川伟[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,辽宁沈阳110016 [2]沈阳科金新材料有限公司,辽宁沈阳110015

出　　处：《光谱学与光谱分析》2011年第10期2839-2842,共4页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展(973计划)项目(2010CB227203);国家自然科学基金项目(21003141)资助

摘　　要：采用先还原后络合的方法，利用草酸将V（V）离子还原并形成络合物，使得全钒氧化还原液流电池（钒电池）电解液的四种价态离子在紫外可见光范围内均具有不同的特征吸收峰。基于此建立了钒电池电解液中不同价态钒离子的光度分析方法，实现对钒离子定性、定量测定。不同价态钒离子标准曲线线性相关系数都大于0．999o，线性范围分别为0．326～2．445，0．326～2．445，0．7205．403，1．784～13．437g·L^-1，测定样品相对标准偏差（n=6）为0．594％～3．535％，满足钒电池电解液中钒离子价态分析的需要。In the present paper, oxalic acid was used to reduce V（ Ⅴ ） ion to V（ Ⅳ ） ion, then its complex with V（ IV ） was formed. By this method, four valence states of vanadium ions had different characteristic absorption peaks in the UV-Visible range. Based on these characteristic absorption peaks, qualitative and quantitative spectrophotometric analysis methods for different valence states of vanadium in vanadium battery electrolyte were established. The results showed that the related coefficients of four standard curves of different valence states were greater than 0. 999 0, linearity ranges were 0. 326-2. 445, 0. 326 -2. 445, 0. 720-5. 403, and 1. 784-13. 437 g · L^- 1, respectively. The measurement of samples suggested that the spectrophotometric analysis method was suitable for analyzing the concentration of valence states of vanadium with the RSDs （n=6） in the range of 0. 594%-3. 535%.

关 键 词：钒电池 钒离子 价态分析 分光光度法 

分 类 号：O657.3[理学—分析化学]