期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 690, 期 -, 页码 101-107出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.08.094
关键词
beta-PbO submicron-particles; Polyvinylpyrrolidone (PVP); Electrochemical property; Anode; Energy storage
资金
- Research Grants Council of Hong Kong [17206714, 17212015, C7044-14G]
- HKU Strategic Research Themes on Clear Energy and Earth as a Habitable Planet
A rapid and low-cost hydrometallurgical process was developed to synthesize submicron lead oxide (PbO) particles in the presence of polyvinylpyrrolidone (PVP). Newly regenerated lead oxide particles with submicron sizes were successfully obtained via the thermal decomposition of lead acetate. The final as-prepared product was identified as orthorhombic beta-PbO, with an average size of about 200 nm. Heat treating, at 550 degrees C for 3 h with the PVP/Pb(CH3COO)(2) precursor at a molar ratio of 2.0, was identified as the critical procedure for forming pure submicron beta-PbO. The PVP dosage significantly affects the interaction between Pb2+ and the PVP molecule, revealed in the FT-IR spectroscopy results. The obtained submicron beta-PbO particles were applied in a lab-scale lead-acid battery and showed an enhanced electrochemical property of 159 mA h/g at a current density of 50 mA/g. This study demonstrates an alternative method of regenerating ultrafine PbO particles with a high electrochemical performance from spent lead paste, which can provide energy storage applications. (C) 2016 Elsevier B.V. All rights reserved.
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