锰基液流电池电解液的体积性质研究  

Study on Volume Properties of Electrolytes in Manganese-Based Flow Batteries

作　　者：秦野 刘畅[1] 刘建国[2] 严川伟[2] Qin Ye;Liu Chang;Liu Jianguo;Yan Chuanwei(Shenyang University of Chemical Technology,Shenyang,110142;Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016)

机构地区：[1]沈阳化工大学,沈阳110142 [2]中国科学院金属研究所,沈阳110016

出　　处：《化学通报》2024年第6期732-738,共7页Chemistry

基　　金：辽宁省教育厅项目(LJKMZ20220768);辽宁省组织部项目(XLYC2007157)资助。

摘　　要：体积性质是锰基液流电池电解液的重要热力学性质,常用于解释溶液中复杂的离子间相互作用关系。本文在283.15~318.15K温度范围内,测定了浓度为0.5~3.0 mol/kg的MnSO_(4)水溶液的密度值,得到了MnSO_(4)溶液的几个热力学参数和弱分子间的相互作用关系。结合Pitzer电解液表观摩尔体积热力学模型,得到了体积参数β~((0)V)MX,β~((1)V)_(MX)和C^(V)_(MX),而且计算值与实验值的相关系数能够达到0.988。这一研究可以更好地理解锰电解液中离子相互作用机制,为优化电解液成分和提高电池性能提供理论支撑。Volume properties are important thermodynamic parameters of manganese-based flow battery(MFB)electrolytes,which are used to explain complex ionic interactions.In this study,the density of MnSO_(4)aqueous solution was measured at concentrations from 0.5~3.0 mol/kg with a 283.15~318.15 K temperature range.Several thermodynamic data and weak molecular interactions of MnSO_(4)solution were obtained.Pitzer′s volume parametersβ^((0)V)_(MX),β(1)V_(MX),and C^(V)_(MX)were obtained by the Pitzer electrolyte thermodynamic model of apparent molar volume.The correlation coefficient between calculational and experimental values reached 0.988.This comprehensive analysis provides theoretical support to explain ion interaction mechanisms and optimize electrolyte compositions to enhance MFB performance.

关 键 词：密度 体积性质 Pitzer热力学模型 离子作用 硫酸锰 

分 类 号：O646.1[理学—物理化学]