Journal
JOURNAL OF POWER SOURCES
Volume 102, Issue 1-2, Pages 270-276Publisher
ELSEVIER
DOI: 10.1016/S0378-7753(01)00810-2
Keywords
manganese dioxide cathode; alkaline battery; impedance; transmission line model; porous electrode
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A simplified 5-RC transmission line equivalent circuit was introduced. Manganese dioxide cathodes from three commercial, primary alkaline cells were investigated by means of ac impedance technique. Cathode Ohmic resistance, Faraday resistance for the reduction of MnO2, proton diffusion rate inside the lattice of EMD and electrochemical accessible surface area were obtained by numerical fitting of impedance data using the simplified transmission line model. The kinetics for cathode surface accessibility was also studied. (C) 2001 Elsevier Science B.V. All rights reserved.
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