Experimental investigation on the effect of surface characterization of electrodes on the gas bubble dynamics in electrolyte flow and performance of FLA batteries by using PIV

doi:10.1016/j.cjche.2020.09.062

中国化学工程学报 ›› 2021, Vol. 33 ›› Issue (5): 30-39.DOI: 10.1016/j.cjche.2020.09.062

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

Experimental investigation on the effect of surface characterization of electrodes on the gas bubble dynamics in electrolyte flow and performance of FLA batteries by using PIV

Saeed Nahidi¹, Iraj Jafari Gavzan¹, Seyfolah Saedodin¹, Mahmoud Salari²

1 Department of Mechanical Engineering, Semnan University, Semnan, Iran;
2 Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran

收稿日期:2020-06-02 修回日期:2020-08-02 出版日期:2021-05-28 发布日期:2021-08-19
通讯作者: Seyfolah Saedodin

Experimental investigation on the effect of surface characterization of electrodes on the gas bubble dynamics in electrolyte flow and performance of FLA batteries by using PIV

Saeed Nahidi¹, Iraj Jafari Gavzan¹, Seyfolah Saedodin¹, Mahmoud Salari²

1 Department of Mechanical Engineering, Semnan University, Semnan, Iran;
2 Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran

Received:2020-06-02 Revised:2020-08-02 Online:2021-05-28 Published:2021-08-19
Contact: Seyfolah Saedodin

摘要/Abstract

摘要： In the flooded lead_acid batteries (FLAB), gas bubbles are initially formed on the surface of the electrodes, which are produced by electrochemical reactions, and then released into the electrolyte. In the present investigation, the effect of surface characterization of electrodes of FLAB on the gas bubble dynamic parameters in the electrolyte flow at different charging/discharging rates (C-rates) are studied utilizing particle image velocimetry (PIV) method. The results show that the capacity of FLAB have a linear behavior due to changes in each of the two parameters of the surface characterization of electrodes and the Crate. At all State of charges (SOCs) of FLAB cells in different tests, increasing average roughness (Ra) and average wavelength of the roughness (λa) in the electrode surfaces, results in an increase in average bubble diameter and bubble rising velocity. Nevertheless, a sharp decrease in the void fraction of bubbles within the electrolyte was observed due to the increment in λa and Ra. Also, the effect of the rising movement of gas bubbles within the electrolyte on the average electrolyte velocity pattern in the gap between the electrodes by changing the surface characterization of electrodes are investigated in detail.

关键词: Particle image velocimetry (PIV), Flooded lead_acid batteries (FLAB), Insoluble gas bubble, Electrochemical reactions, Surface characterization of electrodes

Abstract: In the flooded lead_acid batteries (FLAB), gas bubbles are initially formed on the surface of the electrodes, which are produced by electrochemical reactions, and then released into the electrolyte. In the present investigation, the effect of surface characterization of electrodes of FLAB on the gas bubble dynamic parameters in the electrolyte flow at different charging/discharging rates (C-rates) are studied utilizing particle image velocimetry (PIV) method. The results show that the capacity of FLAB have a linear behavior due to changes in each of the two parameters of the surface characterization of electrodes and the Crate. At all State of charges (SOCs) of FLAB cells in different tests, increasing average roughness (Ra) and average wavelength of the roughness (λa) in the electrode surfaces, results in an increase in average bubble diameter and bubble rising velocity. Nevertheless, a sharp decrease in the void fraction of bubbles within the electrolyte was observed due to the increment in λa and Ra. Also, the effect of the rising movement of gas bubbles within the electrolyte on the average electrolyte velocity pattern in the gap between the electrodes by changing the surface characterization of electrodes are investigated in detail.

Key words: Particle image velocimetry (PIV), Flooded lead_acid batteries (FLAB), Insoluble gas bubble, Electrochemical reactions, Surface characterization of electrodes

Saeed Nahidi, Iraj Jafari Gavzan, Seyfolah Saedodin, Mahmoud Salari. Experimental investigation on the effect of surface characterization of electrodes on the gas bubble dynamics in electrolyte flow and performance of FLA batteries by using PIV[J]. 中国化学工程学报, 2021, 33(5): 30-39.

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Experimental investigation on the effect of surface characterization of electrodes on the gas bubble dynamics in electrolyte flow and performance of FLA batteries by using PIV

Experimental investigation on the effect of surface characterization of electrodes on the gas bubble dynamics in electrolyte flow and performance of FLA batteries by using PIV

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