Imidazolium ionic liquids as electrolytes for manganese dioxide free Leclanché batteries

A set of four imidazolium ionic liquids (solid at room temperature) and one imidazolium ionic solid was screened for its potential as electrolytes in manganese dioxide free Leclanché batteries, equipped with a zinc anode and graphite cathode. Electrical impedance spectroscopy allowed to determine th...

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Bibliographic Details
Published in:Applied energy 2009-09, Vol.86 (9), p.1512-1516
Main Authors: Stracke, M.P., Migliorini, M.V., Lissner, E., Schrekker, H.S., Dupont, J., Gonçalves, R.S.
Format: Article
Language:English
Subjects:
Applied sciences
Benzoquinone reduction
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Energy accumulation
Energy storage
Energy storage Environmental impact Energy technology Leclanche battery Imidazolium ionic liquid electrolytes Benzoquinone reduction
Energy technology
Environmental impact
Exact sciences and technology
Imidazolium ionic liquid electrolytes
Leclanché battery
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Summary:A set of four imidazolium ionic liquids (solid at room temperature) and one imidazolium ionic solid was screened for its potential as electrolytes in manganese dioxide free Leclanché batteries, equipped with a zinc anode and graphite cathode. Electrical impedance spectroscopy allowed to determine the room-temperature ionic solids (RTISs) ionic conductivities, which was the highest for carboxylic acid functionalized RTIS 3 [C 2O 2MIm][Cl]. The toxic manganese dioxide was substituted by benzoquinone. A systematic ionic conductivity optimization of RTIS 3–benzoquinone–ZnSO 4–H 2O mixtures at room temperature resulted in the identification of the following conditions for the Leclanché battery studies: 50 mg of a 50:50 RTIS:benzoquinone mixture and 96 mg of water. The chronopotentiometric experiments with a constant current of 5 μA showed a remarkable performance for the RTIS 3 based battery. The potential (1.47 V) and stability is comparable to that of the commercial Rayovac ® battery filling (model AA). Furthermore, linear potentiodynamic voltammetry (0.01 V/s) and chronoamperometric analysis at short-circuit conditions (0.0 V) validated the RTIS 3–benzoquinone–water battery as a promising alternative for manganese dioxide free Leclanché batteries.
ISSN:0306-2619
1872-9118
DOI:10.1016/j.apenergy.2008.11.014