Evaluation of porous electrode properties using metal-air electrochemical system

• Published in: Advanced Materials Research
• Main Author: Nor Hairin A.L.; Othman R.; Ani M.H.; Saputra H.; Yahya M.Z.A.
• Format: Conference paper
• Language: English
• Published: 2012
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84861650768&doi=10.4028%2fwww.scientific.net%2fAMR.512-515.1619&partnerID=40&md5=9e6b2f8302d0ac1fbb179b12c5559c15

This work explores the use of metal-air electrochemical system to evaluate porous electrode properties i.e. specific surface area and pore volume density. Porous zinc electrodes are prepared from an acidic, chloride electrolytic bath of varying supporting electrolyte (NH 4Cl) formulation to produce electrodeposits of distinctive properties. Nitrogen physisorption at 77 K is utilized to evaluate the specific surface area and pore volume density of the electrodes. The zinc electrodeposits prepared from all electrolytic bath formulations are then assembled into zinc-air cells as the anodic electrode and characterized according to their limiting current density and discharge capacity. It is found that the variation in limiting current density matches that of BET surface area and the trend for discharge capacity follows that of pore volume density. © (2012) Trans Tech Publications, Switzerland.