Particle Image Velocimetry study on the formation of gas bubbles and electrolyte velocity due to electrochemical reactions for different distances between the electrodes of Flooded Lead_ Acid batteries. (24th February 2021)

• Record Type: Journal Article
• Authors: Nahidi, Saeed; Gavzan, Iraj Jafari; Saedodin, Seyfolah; Salari, Mahmoud
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 14(2021)
• Page Start: 9466
• Page End: 9478
• Publication Date: 2021-02-24
• Subjects: Flooded Lead_ Acid Batteries (FLA) -- Particle Image Velocimetry (PIV) -- Distance between electrodes -- Gas bubble -- Electrochemical reactions; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.12.097
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: During the charging processes in Flooded Lead_ Acid batteries (FLA), the production of gas bubbles occurs and it effects on the FLA performance. In this experimental investigation, the effect of distance between electrodes at different charge-discharge rates on the electrolyte flow velocity and bubbles behavior is investigated based on the Particle Image Velocimetry method. The reduction in the distance decreases the FLA capacity linearly at the same processes. It leads to an increase in the void fraction of bubbles and a decline in the diameter and rising velocity of the bubbles. The maximum diameter of the bubbles during the charging processes is very small compared to the distances between the electrodes. The effect of electrolyte velocity compared to the effect of the average rising velocity of bubbles on the FLA performance is negligible. The results show that the increase in the void fraction of the bubbles and the formation of bubble layers in the vicinity of the electrodes is the most critical factor at the increase of the ohmic resistance. Graphical abstract: Hydrogen bubble layer at vicinity of the cathode electrode and oxygen bubble layer at vicinity of the anode electrode in the FLA cell. Image 1 Highlights: In this study, increasing FLA capacity and reducing charging time are main issues. In FLA, gas bubbles are produced on the electrodes and dispersed in to the electrolyte. Using PIV method, the electrolyte velocity and bubble behavior in FLA are studied. In FLA, the effects of electrode gap and C-rate on the gas bubbles are investigated.