Electrochemical properties of positive electrode in lead-acid battery modified by ammonium-based ionic liquids

Agnieszka Gabryelczyk,Bartosz Łęgosz,Juliusz Pernak,Filip Walkiewicz,Włodzimierz Majchrzycki,Marek Baraniak,Grzegorz Lota,Paweł Kędzior,Ewa Jankowska,Kacper Kopczyński

doi:10.1007/s10008-017-3817-7

Abstract

The influence of selected types of ammonium ionic liquid (AIL) additives on corrosion and functional parameters of lead-acid battery positive electrode was examined. AILs with a bisulfate anion used in the experiments were classified as protic, aprotic, monomeric, and polymeric, based on the structure of their cation. Working electrodes consisted of a lead-calcium-tin alloy utilized in the industry for manufacturing current collectors of positive electrodes in lead-acid batteries (LABs). This alloy was used in the first part of the study for the evaluation of corrosion intensity and stability of electrolyte with AIL additives. In the second part, the grid made of the examined alloy was covered with positive active mass, the composition of which was modified by selected AIL. The selection of an appropriate substance was made based on parameters such as corrosion potential, corrosion current, polarization resistance, and hydrogen and oxygen evolution potentials. Techniques such as linear sweep voltammetry, corrosimetry, and electrochemical impedance spectroscopy were used. The conducted measurements revealed that polymeric AIL additive had an exceptionally positive influence on the inhibition of the corrosion process in LAB and electrochemical window of the electrolyte. The influence of this compound on the specific capacity and resistance of the active mass was also discussed.Graphical abstractᅟ

Highlights

PPUH AUTOPARTJacek Bąk Sp. z o.o, Kwiatkowskiego 2a, 39-300 Mielec, Poland polymeric ammonium ionic liquid (AIL) additive had an exceptionally positive influence on the inhibition of the corrosion process in lead-acid batteries (LABs) and electrochemical window of the electrolyte
Lead-acid batteries are secondary cells characterized by both high nominal potential (2.1 V) for a device with aqueous electrolyte and power density (123 W kg−1) [1, 2]
Their relatively good reliability and simple recycling made them a power supply, which can still compete with newer chemical power sources [1,2,3]

Summary

PPUH AUTOPART

Jacek Bąk Sp. z o.o, Kwiatkowskiego 2a, 39-300 Mielec, Poland polymeric AIL additive had an exceptionally positive influence on the inhibition of the corrosion process in LAB and electrochemical window of the electrolyte. The influence of this compound on the specific capacity and resistance of the active mass was discussed.

Introduction

Results and discussion

Conclusions

Compliance with ethical standards