Investigation on the electrode process of the Mn(II)/Mn(III) couple in redox flow battery
Investigation on the electrode process of the Mn(II)/Mn(III) couple in redox flow battery
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氧化还原液流电池中Mn(II)/Mn(III)对电极过程的研究
DOI：
10.1016/j.electacta.2008.04.040
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发表时间：
2008-09
影响因子：
6.6
通讯作者：
中科院分区：
文献类型：
--
作者：
Mn(II)/Mn(III)对被认为是氧化还原液流电池的潜在阳极，可以取代全钒氧化还原电池(VRB)中的V(IV)/V(V)和多硫化钠/溴(PSB)中的Br2/Br−，因为它具有更高的标准电极电位。本研究通过循环伏安法、稳态极化曲线、电化学阻抗谱、瞬态电位阶跃实验、X射线衍射和充放电实验研究了Mn(II)/Mn(III)电对在碳毡和光谱纯石墨上的电化学行为。结果表明，碳毡电极上Mn(III)歧化反应现象明显，而石墨电极上由于活性位点较少，Mn(III)歧化反应现象较弱。详细讨论了碳毡上的反应机理。当石墨电极上硫酸浓度为5M时，Mn(II)/Mn(III)的可逆性最好。通过恒流充放电测试评估了采用Mn(II)/Mn(III)对作为阳极电解液活性物质、V(III)/V(II)作为阴极电解液活性物质的RFB的性能。在电流密度为20mAcm−2时，平均库伦效率为69.4%，电压效率为90.4%。整体能效高达62.7%，接近全钒电池，平均放电电压比全钒电池高14%左右。初步探索表明，Mn(II)/Mn(III)电对在氧化还原液流电池方面具有电化学前景。
The Mn(II)/Mn(III) couple has been recognized as a potential anode for redox flow batteries to take the place of the V(IV)/V(V) in all-vanadium redox battery (VRB) and the Br2/Br−in sodium polysulfide/bromine (PSB) because it has higher standard electrode potential. In this study, the electrochemical behavior of the Mn(II)/Mn(III) couple on carbon felt and spectral pure graphite were investigated by cyclic voltammetry, steady polarization curve, electrochemical impedance spectroscopy, transient potential-step experiment, X-ray diffraction and charge–discharge experiments. Results show that the Mn(III) disproportionation reaction phenomena is obvious on the carbon felt electrode while it is weak on the graphite electrode owing to its fewer active sites. The reaction mechanism on carbon felt was discussed in detail. The reversibility of Mn(II)/Mn(III) is best when the sulfuric acid concentration is 5M on the graphite electrode. Performance of a RFB employing Mn(II)/Mn(III) couple as anolyte active species and V(III)/V(II) as catholyte ones was evaluated with constant-current charge–discharge tests. The average columbic efficiency is 69.4% and the voltage efficiency is 90.4% at a current density of 20mAcm−2. The whole energy efficiency is 62.7% close to that of the all-vanadium battery and the average discharge voltage is about 14% higher than that of an all-vanadium battery. The preliminary exploration shows that the Mn(II)/Mn(III) couple is electrochemically promising for redox flow battery.
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影响因子：
6.2
作者：
R. Selim;J. Lingane
通讯作者：
R. Selim;J. Lingane
Ir改性碳毡作为全钒氧化还原液流电池正极的研究
影响因子：
6.6
作者：
Wang, W. H.;Wang, X. D.
通讯作者：
Wang, X. D.
影响因子：
6.6
作者：
Ping Zhao;Huamin Zhang;Hantao Zhou;B. Yi
通讯作者：
Ping Zhao;Huamin Zhang;Hantao Zhou;B. Yi
影响因子：
6.9
作者：
I. Tsuda;K. Nozaki;K. Sakuta;K. Kurokawa
通讯作者：
I. Tsuda;K. Nozaki;K. Sakuta;K. Kurokawa
DOI：
10.1039/f19837900417
发表时间：
1983
期刊：
Journal of the Chemical Society, Faraday Transactions
影响因子：
--
作者：
A. Kuhn;T. H. Randle
通讯作者：
A. Kuhn;T. H. Randle