Abstract
Measurement of state-of-charge of lead-acid batteries using potentiometric sensors would be convenient; however, most of the electrochemical couples are either soluble or are unstable in the battery electrolyte. This paper describes the results of an investigation of poly (divinylferrocene) (PDVF) and Poly(diethynylanthraquinone) (PAQ) couples in sulfuric acid with the view to developing a potentiometric sensor for lead-acid batteries. These compounds were both found to be quite stable and undergo reversible reduction/oxidation in sulfuric acid media. Their redox potential difference varied linearly with sulfuric acid concentration in the range of 1 M - 5 M (i.e. simulated lead-acid electrolyte during battery charge/discharge cycles). A sensor based on these compounds has been investigated.
Highlights
Lead-acid batteries are currently an essential component of any power supply based on renewable energy systems including solar, wind, diesel, and hybrid resources
A drop-coated electrode was prepared on glassy carbon by applying a single drop of a PAQ/dimethyl formamide (DMF) solution onto the surface of the electrode and allowing it to dry
The PAQ studied showed desirable properties to be used as the pH-sensitive material in the target potentiometric sensor
Summary
Lead-acid batteries are currently an essential component of any power supply based on renewable energy systems including solar, wind, diesel, and hybrid resources. The life of the battery plays an important role in the reliability and economies of such systems and it is essential that the state-of-charge of the battery is pre-. (2014) Potentiometric Measurement of State-of-Charge of Lead-Acid Batteries Using Polymeric Ferrocene and Quinones Derivatives. For a long battery life and efficient energy management it is necessary that the state-of-charge of the battery be monitored during operation [1]. The concentration of the battery electrolyte, sulfuric acid, decreases on discharge and increases on charge, as explained in the electrochemical reactions (1 - 4), provides means of indicating the state-of-charge of the lead-acid battery.
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