Synthesis, Characterization and Evaluation of Pb Electroplated Carbon felts for Achieving Maximum Efficiency of Fe-Cr Redox Flow Cell

Synthesis, Characterization and Evaluation of Pb Electroplated Carbon felts for Achieving Maximum Efficiency of Fe-Cr Redox Flow Cell

Siva Rao TirukkovalluriRama Krishna Hanuman Gorthi 

Department of inorganic and analytical chemistry, Andhra University, Visakhapatnam, India

HBL Power systems Ltd., Andhra Pradesh, India

Corresponding Author Email: 
raost@yahoo.com
Page: 
287-292
|
DOI: 
https://doi.org/10.14447/jnmes.v16i4.155
Received: 
4 February 2013
| |
Accepted: 
25 February 2013
| | Citation
Abstract: 

To catalyze Cr(III)/Cr(II) redox couple, Pb was used as candidate catalysts. Pb has a remarkable behavior on reduction and oxidation of chromium couple to enhance the performance of Fe-Cr redox flow cell. In the present investigation catalyzed carbon felt sub- strates were used as electrodes on negative side which were electrochemically plated/ loaded with Pb from 0.05g to 1.2g. The cell compris- ing 0.8 g Pb loaded felt has shown 100% Chromium reduction efficiency, 98% coulombic efficiency and zero hydrogen gassing at 32oC for 15 cycles of charge and discharge. 5liters of 1.3N FeCl2 in 2N HCl as catholyte, 1.3N CrCl3 in 2N HCl as anolyte containing 0.05N BiCl3 as additive were used as electrolytes. The cell operated with Nafion-117 PFSA membrane. 100 cm2 GFA grade carbon felts with 3mm thickness were utilized as electrodes at a current density of 50 mA/ cm2.

Keywords: 

Fe-Cr redox flow cell; Pb electroplated felts; BiCl3 as additive; Chromium reduction efficiency; Coulombic efficiency

1. Introduction
2. Experimentation
3. Results and Discussion
4. Conclusions
5. Acknowledgments
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