Study on the reversibility of PbOx(1 | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

7183640

Reference Type

Journal Article

Title

Study on the reversibility of PbOx(1

Author(s)

Luo, X; Liu, Z; Jiang, B; Ji, D; Huang, C; ,

Year

2020

Publisher

ELSEVIER

Location

AMSTERDAM

Volume

DOI

10.1016/j.est.2020.101475

Web of Science Id

WOS:000560682900007

Abstract

In this work, different soluble lead electrolytes, lead methanesulfonate, lead trifluoromethylsulfonate and lead perchlorate are selected to investigate the characteristics of anodic electrodeposited materials. The charge current is large in Pb(CF3SO3)(2)/CF3SO3H electrolyte, followed by those in Pb(ClO4)(2)/HClO4 and Pb(CF3SO3)(2)/CF3SO3H solutions at the same positive electrode potential of 1.7 V vs. SCE. Physiochemical properties of PbO2, such as the particle size and its distribution, alpha-phase and beta-phase, and the non-stoichiometry of PbO2 are investigated using SEM, XRD and XPS. PbO2 particles have a ball shape, which are electrodeposited in different electrolytes. Their sizes are 1.97 +/- 0.84, 1.13 +/- 0.35 and 1.78 +/- 0.21 pm in Pb(CH3SO3)(2)/CH3SO3H, Pb (CF3SO3)(2)/CF3SO3H and Pb(ClO4)(2)/HClO4 electrolytes respectively. alpha-PbO2 has a larger grain size than beta-PbO2 in those three electrolytes. PbOx (x = 1.72) with the highest oxygen content is obtained in Pb(CF3SO3)(2)/CF3SO3H electrolyte. Compared with other solutions, the reversibility of PbOx/Pb2+ exhibits the best in Pb (CF3SO3)(2)/CF3SO3H electrolyte, and the coulombic efficiency of 96.0 +/- 0.4% is achieved.

Keywords

Soluble lead flow battery; Electrolyte; Oxidation activity; Impedance