Charging of flowable electrodes with bimodal distribution of carbon particles

Charging of flowable electrodes with bimodal distribution of carbon particles
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具有碳颗粒双峰分布的可流动电极的充电

DOI:
10.1007/s10665-021-10177-5
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发表时间:
2021
影响因子:
1.3
通讯作者:
Li, Deyu
Li, Deyu
中科院分区:
工程技术4区
文献类型:
--
作者:
Stacks, Brandon;Luo, Haoxiang;Li, Deyu

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作为“可流动电极”的碳浆料最近已用于一些电化学系统中,例如,用于能量存储的电化学流动电容器(EFC)和用于水处理的流动电极电容去离子(FCDI)。这些浆料通常具有三个部分:活性炭颗粒、导电添加剂如炭黑和电解质水溶液。以前,开发了一种基于粒子的计算模型,采用斯托克斯动力学来描述粒子运动和相互作用,同时求解移动粒子的电网络内的电荷转移。在这项工作中,我们开发了一个统一的表达的动态变化的电网络。此外,我们还引入了一组较小的颗粒作为导电添加剂,研究了其对浆料电荷转移的影响。结果表明,在较低的浓度下,小颗粒可以通过填充间隙空间和桥接大颗粒的接触来增强电荷转移;然而,在较高的浓度下,由于大颗粒的直接接触在电荷转移中起主导作用,因此益处并不明显。
Carbon slurries as “flowable electrodes” have been used recently in a few electrochemical systems, e.g., electrochemical flow capacitors (EFCs) for energy storage and flow-electrode capacitive deionization (FCDI) for water treatment. These slurries typically have three parts: activated carbon particles, a conductive additive such as carbon black, and an aqueous electrolyte solution. Previously, a particle-based computational model that employs Stokesian dynamics was developed to describe the particle motion and interaction, while simultaneously solving for the charge transfer inside an electrical network of moving particles. In this work, we develop a unified expression of the dynamically varying electrical network. Furthermore, we incorporate a group of smaller particles as the conductive additive, whose effect on the charge transfer of the slurry is studied. The results suggest that at lower concentrations, the small particles may enhance charge transfer by filling interstitial spaces and bridging contacts of large particles; however, at higher concentrations, the benefits are not as clear since direct contacts of the large particles play the dominant role in charge transfer.
DOI: 10.1017/s0022112093001697
发表时间: 1993-08-01
影响因子: 3.7
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CHANG, CY;POWELL, RL
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双峰硬球分散体的流变学
DOI: 10.1063/1.868226
发表时间: 1994
期刊: Physics of Fluids
影响因子: 4.6
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DOI: 10.1007/bf00945124
发表时间: 1988
期刊: Zeitschrift für angewandte Mathematik und Physik ZAMP
影响因子: --
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R. Corless;D. J. Jeffrey
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球体的随机堆积以及单分散和双分散悬浮液的流动性限制。
DOI: 10.1103/physrevlett.68.1422
发表时间: 1992
影响因子: 8.6
作者:
A. Shapiro;R. Probstein
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