Catholyte electrolyte stability for all-vanadium redox battery

李小山1; 2

doi:10.3969/j.issn.0438-1157.2011.z2.024

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Catholyte electrolyte stability for all-vanadium redox battery

更新时间：2025-12-10

- Catholyte electrolyte stability for all-vanadium redox battery
- CIESC Journal Issue S2, Pages: 140-143(2011)
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- DOI：10.3969/j.issn.0438-1157.2011.z2.024
  CLC：
- Online First：20 December 2011，
  
  Published：20 December 2011
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李小山1, 2. Catholyte electrolyte stability for all-vanadium redox battery[J]. CIESC Journal, 2011, (S2): 140-143.
DOI：

李小山1, 2. Catholyte electrolyte stability for all-vanadium redox battery[J]. CIESC Journal, 2011, (S2): 140-143. DOI： 10.3969/j.issn.0438-1157.2011.z2.024.

摘要

在钒硫酸溶液中加入添加剂

对钒电池阴极电解液的稳定性进行了研究。利用循环伏安法和交流阻抗法分别对含1%的草酸、草酸铵、乙二胺四乙酸、葡萄糖、D-果糖、α-乳糖的V（Ⅲ）硫酸溶液进行了分析测试。实验结果表明：添加上述添加剂后，溶液中V（Ⅲ）的溶解度和稳定性有所提高，羧酸类化合物比羟基类化合物的效果更加明显，更适合作为阴极电解液的添加剂。当采用1%草酸的1.8 mol· L-1 V（Ⅲ）硫酸溶液作为阴极电解液和2 mol·L-1 VOSO4硫酸溶液作为阳极电解液组装钒电池时，电池的充放电性能表明此时钒硫酸溶液具有较高的单位体积电容量。

Abstract

Catholyte stability of VRB was studied by adding additives in the negative vanadium sulfate solution. The V（Ⅲ）sulfate solutions properties with 1% oxalic acid，ammonium oxalate，ethylene diamine tetraacetic acid，glucose，D-fructose and α-lactose were investigated by using cyclic voltammetry and AC impedance. The experimental results showed that the solubility and stability of V（Ⅲ）solution were improved. The solution containing a small amount of carboxylic acids was better than that containing hydroxyl compounds. The charge-discharge performance of the VRB（1.8 mol·L-1 V3+ sulfate solution with 1% oxalic acid as catholyte and 2 mol·L-1 VOSO4-H2SO4 solution as anolyte）had the higher unit volume capacity.

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