Theory of cyclic voltammetry in random arrays of cylindrical microelectrodes applied to carbon felt electrodes for vanadium redox flow batteries

Tichter Tim; Andrae Dirk; Mayer Jacob; Schneider Jonathan; Gebhard Marcus; Roth Christina

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Theory of cyclic voltammetry in random arrays of cylindrical microelectrodes applied to carbon felt electrodes for vanadium redox flow batteries

机译：圆柱微电极随机函数循环伏安法理论，施加到钒氧化钠流动电池的炭毡电极

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In order to quantitatively investigate the kinetic performance and the pore size distribution of carbon felt electrodes for the application in vanadium redox flow batteries, the theory of cyclic voltammetry (CV) is derived for a random network of cylindrical microelectrodes on the base of convolutive modeling. In this context we present an algorithm based on the use of a modified Talbot contour for inverse Laplace transformation, providing the mass transfer functions required for the calculation of the CV responses in external cylindrical finite diffusion space. First-order homogenous chemical kinetics preceding and/or following the electrochemical reactions are implemented in this algorithm as well. The VO2+ oxidation is investigated as model reaction at pristine and electrochemically aged commercial carbon felt electrodes. A fit of simulated data to experimental data clearly shows that an electrochemical aging predominantly affects the kinetics of the electron transfer reaction and that internal electrode surfaces and pore size distributions remain constant. The estimated pore size distributions are in excellent agreement with porosimetry measurements, validating our theory and providing a new strategy to determine electrode porosities and electrode kinetics simultaneously via CV.

机译：为了定量地研究碳毡电极的动力学性能和孔尺寸分布在钒氧化还原流动电池中的应用，循环伏安法（CV）的理论用于卷曲建模基极的圆柱微电极的随机网络。在这种情况下，我们介绍了一种基于使用改进的塔尔谱轮廓的算法，用于反向拉拉普拉斯变换，提供了计算外圆柱有限扩散空间中的CV响应所需的质量传递功能。在电化学反应之前和/或之后的一流均质化学动力学也在该算法中实施。 VO2 +氧化被研究为原始和电化学老化的商业碳毡电极的模型反应。模拟数据与实验数据的拟合清楚地表明，电化学老化主要影响电子转移反应的动力学，并且内部电极表面和孔径分布保持恒定。估计的孔径分布与孔隙测量的良好一致，验证我们的理论并提供了一种通过CV同时测定电极孔隙和电极动力学的新策略。

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《Physical chemistry chemical physics: PCCP》 |2019年第18期|共8页
作者
Tichter Tim; Andrae Dirk; Mayer Jacob; Schneider Jonathan; Gebhard Marcus; Roth Christina;
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作者单位

Free Univ Berlin Inst Chem &

Biochem Phys &

Theoret Chem Takustr 3 D-14195 Berlin Germany;

Free Univ Berlin Inst Chem &

Biochem Phys &

Theoret Chem Takustr 3 D-14195 Berlin Germany;

Free Univ Berlin Inst Chem &

Biochem Phys &

Theoret Chem Takustr 3 D-14195 Berlin Germany;

Free Univ Berlin Inst Chem &

Biochem Phys &

Theoret Chem Takustr 3 D-14195 Berlin Germany;

Free Univ Berlin Inst Chem &

Biochem Phys &

Theoret Chem Takustr 3 D-14195 Berlin Germany;

Free Univ Berlin Inst Chem &

Biochem Phys &

Theoret Chem Takustr 3 D-14195 Berlin Germany;

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正文语种 eng
中图分类物理学;化学;
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1. Theory of cyclic voltammetry in random arrays of cylindrical microelectrodes applied to carbon felt electrodes for vanadium redox flow batteries [J] . Tichter Tim, Andrae Dirk, Mayer Jacob, Physical chemistry chemical physics: PCCP . 2019,第18期

机译：圆柱微电极随机函数循环伏安法理论，施加到钒氧化钠流动电池的炭毡电极
2. Preparation of Sulphur-Doped Graphene-Based Electrodes by Cyclic Voltammetry: A Potential Application for Vanadium Redox Flow Battery [J] . Hurmus Gursu, Metin Gencten, Yucel Sahin International Journal of Electrochemical Science . 2018,第1期

机译：循环伏安法制备硫掺杂石墨烯基电极：钒氧化还原液流电池的潜在应用
3. Electrocatalytic activity of MnO2 nanosheet array-decorated carbon paper as superior negative electrode for vanadium redox flow batteries [J] . Jiang Yingqiao, Feng Xiaojian, Cheng Gang, Electrochimica Acta . 2019,第期

机译：MNO2纳米片阵列装饰碳纸的电催化活性作为钒氧化还原电池的上负电极
4. Real-Space 3D Simulation of Cyclic Voltammetry in Carbon Felt Electrodes for Application in Vanadium Redox-Flow Batteries Based on a Combination of Micro CT Data, Digital Simulation and Convolutive Modelling [C] . Tim Tichter, Dirk Andrae, Jonathan Schneider, Meeting of the Electrochemical Society;International Meeting on Chemical Sensors . 2020

机译：基于Micro CT数据的组合，数字仿真和卷曲建模的组合，碳毡电极循环伏安法的实时空间3D模拟钒氧化还原电池
5. Understanding Critical Factors Underpinning Electrode Degradation in Vanadium Redox Flow Batteries [D] . Nourani, Mahnaz . 2020

机译：了解钒氧化还原流电池中缺乏电极降解的关键因素
6. Performance Enhancement of Vanadium Redox Flow Battery by Treated Carbon Felt Electrodes of Polyacrylonitrile using Atmospheric Pressure Plasma [O] . Chien-Hong Lin, Yu-De Zhuang, Ding-Guey Tsai, 2020

机译：常压等离子体处理的聚丙烯腈碳毡电极对钒氧化还原液流电池性能的提高
7. Universal Algorithm for Simulating and Evaluating Cyclic Voltammetry at Macroporous Electrodes by Considering Random Arrays of Microelectrodes [O] . Tim Tichter, Jonathan Schneider, Dirk Andrae, 2020

机译：考虑微电极随机阵列，用于在大孔电极上模拟和评估循环伏安法的通用算法
8. Theory of Steady--State Current--Voltage Curves of Redox Electrode Reactions in Hydrodynamic Voltammetry. I. Laminary Stagnation-Point Flows [R] . Matsuda, H. 1967

机译：流体动力学伏安法中氧化还原电极反应的稳态电流 - 电压曲线理论。 I. Laminary stagnation-point Flows

Theory of cyclic voltammetry in random arrays of cylindrical microelectrodes applied to carbon felt electrodes for vanadium redox flow batteries

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