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Faradaic and non-faradaic contributions to the power and energy characteristics of electrolytic manganese dioxide for electrochemical capacitors

Version 2 2024-06-13, 10:32
Version 1 2017-05-16, 14:22
journal contribution
posted on 2024-06-13, 10:32 authored by MF Dupont, SW Donne
Step potential electrochemical spectroscopy (SPECS) has been applied to a range of different electrolytic manganese dioxide (EMD) samples to examine the changes in the charge storage mechanism as a function of the scan rate. The SPECS method allowed the charge storage contributions due to double layer and pseudo-capacitance to be decoupled. The charge storage mechanism has been shown to transition from predominantly pseudo-capacitive behavior to predominantly double layer behavior as the scan rate is increased. The relative contributions from each of these processes to the overall specific energy and power of each EMD samples has been analyzed and related to the properties of each material.

History

Journal

Journal of the electrochemical society

Volume

163

Pagination

A888-A897

Location

Pennington, N.J.

ISSN

0013-4651

eISSN

1945-7111

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2016, Electrochemical Society

Issue

6

Publisher

Electrochemical Society