丙三醇对钒液流电池电解液影响的交流阻抗研究

杨春; 王金海; 谢晓峰; 尚玉明; 王树博; 毛宗强

您当前的位置：

首页 >

文章列表页 >

丙三醇对钒液流电池电解液影响的交流阻抗研究

更新时间：2025-12-10

- 丙三醇对钒液流电池电解液影响的交流阻抗研究
- CIESC Journal Issue S1, Pages: 163-167(2011)
- 作者机构：
  
  清华大学核能与新能源技术研究院,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：03 July 2011，
  
  Published：03 July 2011
- 稿件说明：
移动端阅览
杨春, 王金海, 谢晓峰, et al. 丙三醇对钒液流电池电解液影响的交流阻抗研究[J]. CIESC Journal, 2011, (S1): 163-167.
DOI：

杨春, 王金海, 谢晓峰, et al. 丙三醇对钒液流电池电解液影响的交流阻抗研究[J]. CIESC Journal, 2011, (S1): 163-167. DOI：

摘要

采用交流阻抗法研究了添加剂丙三醇对全钒氧化还原液流电池阳极电解液电极反应影响的内部作用机理。通过RS(Cd(RpW))形式的等效电路对其阻抗谱进行了较好的模拟解析，研究结果发现，随着丙三醇含量的依次增加，溶液电阻、双电层电容和极化电阻均出现最小值，浓差极化电阻出现最大值，此时添加量均为1%，说明含有一定量供电子基团结构的丙三醇能够有效结合钒离子，均匀分散于溶液中，使得溶液电阻降低，当钒离子结合丙三醇后体积增大，双电层电容距离增加，从而双电层电容降低，当钒离子结合丙三醇后更利于向电极表面吸附，提高阳极电解液的催化效率，加大了电极表面反应物浓度与本体溶液中的差值，使得浓差极化电阻增强，电极反应效率提高。

Abstract

Electrochemical impedance spectrum (EIS) was employed to investigate the mechanism of electrode reaction in anodic electrolyte of vanadium redox battery with additive of glycerin.The spectrums were simulated through the equivalent circuit of RS(Cd(RpW))

and the results show that with the increase of the content of glycerin

the values of RS (the solution resistance)

Cd (the double electric layer capacitor) and Rp (the polarization resistance) reach their minimum with 1% glycerin and the concentration polarization reaches its maximum with 1% glycerin.It indicates glycerin containing electron-donating group has effectively promoted the vanadium ion dispersed in solution

so that the solution resistance decreases.When the vanadium ions combining with the glycerin

the increase of molecule volume results in the distance of double electric layer increase

which leads to the decrease of the value of double electric layer capacitor.The adsorption of vanadium ions on electrode surface has been enhanced by added glycerin in anodic electrolyte so as to increase redox catalyst efficiency of anodic electrolyte.Because of the increase of electrode reaction

relative concentration difference between the vanadium ions in solutions and on the surface of electrode has become wider.

关键词

Keywords

references

Views

706

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effect of pigment volume concentration on properties of waterborne antistatic anticorrosive epoxy coating

Recent advances in machine learning for modeling and control of crystallization processes

Progress in research of selective oxidation of low carbon polyols over nano-Au catalysts with precise electronic effect regulation

Study on entropy wave production and dissipation in partially premixed swirl flames subject to inlet perturbations

Advantages and risks of swirling cooling granulation towers

Related Author

CHEN Zhonghua

TANG Ying

YU Fei

SU Guohui

CHEN Haihong

Related Institution

华南理工大学材料科学与工程学院

广东省特种涂料工程技术研究开发中心

⁰