Imidazolium ionic liquids as electrolytes for manganese dioxide free Leclanché batteries

M.P. Stracke, M.V. Migliorini, E. Lissner, H.S. Schrekker, J. Dupont and R.S. Gonçalves

Applied Energy, 2009, vol. 86, issue 9, 1512-1516

Abstract: 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 [C2O2MIm][Cl]. The toxic manganese dioxide was substituted by benzoquinone. A systematic ionic conductivity optimization of RTIS 3-benzoquinone-ZnSO4-H2O 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 [mu]A 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.

Keywords: Energy; storage; Environmental; impact; Energy; technology; Leclanche; battery; Imidazolium; ionic; liquid; electrolytes; Benzoquinone; reduction (search for similar items in EconPapers)
Date: 2009
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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