Preparation of manganese oxide - graphite electrodes by electrophoretic deposition

Manganese oxide is a promising active material for supercapacitors (SCs) with pseudocapacitance due to its high capacitance and its environmentally friendly character. This paper deals with the preparation of electrodes for supercapacitors consisting of manganese oxide supported onto graphite by ele...

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Bibliographic Details
Published in:Ceramics international 2017-02, Vol.43 (3), p.3231-3237
Main Authors: Argüello, Juan A., Cerpa, Arisbel, Alanbari, Mohammad H., Fariñas, Juan Carlos, Moreno, Rodrigo
Format: Article
Language:English
Subjects:
A: Films
A: Suspensions
C: Electrical properties
D: Transition metal oxides
E: Electrodes
Supercapacitors
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Summary:Manganese oxide is a promising active material for supercapacitors (SCs) with pseudocapacitance due to its high capacitance and its environmentally friendly character. This paper deals with the preparation of electrodes for supercapacitors consisting of manganese oxide supported onto graphite by electrophoretic deposition. Manganese oxide powders were characterized and dispersed in water by controlling the colloidal and rheological behavior in order to obtain stable suspensions. Optimized manganese oxide suspensions were deposited onto graphite electrodes by electrophoretic deposition. The deposited mass per unit area in the electrodes was optimized by controlling the applied current density and the deposition time. It has been demonstrated that the introduction of a binder helped to improve the adherence to graphite; otherwise the deposit thickness obtained by EPD is limited and no films can be obtained by simply dipping. These conditions allowed us to obtain more homogeneous deposits with higher specific energy than without binder.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2016.11.150