Study on a Cd-Fe Redox Flow Battery in a Sulphuric Acid Electrolyte

Abstract:

A Cd-Fe redox flow battery is proposed, in which CdSO₄-H₂SO₄ aqueous solution is used as negative electrolyte, FeSO₄-Fe₂(SO₄)₃-H₂SO₄ aqueous solution is used as positive electrolyte, copper is used as negative electrode, carbon felt is used as positive electrode and proton exchange membrane is used as separator. Fe²⁺ is oxidized to Fe³⁺ at positive electrode and the Cd²⁺ is reduced to cadmium and electroplated onto the negative electrode during charge. The reverse occurs during discharge. An average discharge cell voltage of about 0.99V at 10mA/cm² and an average energy efficiency of about 70.8% are obtained.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 1519-1523
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.1519
• Online since: November 2011
• Authors: Jie Cheng, Hui Min Zhang, Yue Hua Wen, Gao Ping Cao, Yu Sheng Yang
• Keywords: Cadmium (Cd), Iron, Redox Flow Battery, Sulphuric Acid

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