The Research Of Preparation And Electrochemical Performance Of Lead Oxides Prepared Through Wasted Lead-Acid Batteries Recycling Lead Carbonate Thermal Decomposition

With the lead-acid battery widely application and the global lead resource’s reducing, lead-acid battery recycling has already became the essential part in the development of lead-acid battery industry. How to successfully applying secondary lead to production has drawn more and more attention. This topic, as a support research of a novel atom economic method of recycling wasted lead-acid battery, will provide technical support for the industrial application of secondly lead.Different crystal types of lead oxide were prepared from lead carbonate, which is synthesized through a novel atomic economic method by recycling waste lead acid batteries. Lead oxides electrochemical performance and its industrial application value were studied. The main contents are as follows:In this paper, first, the calcination of lead carbonate under air and argon atmosphere was researched. And we found that α-PbO and β-PbO could be prepared from lead carbonate through calcination at 450℃ under argon atmosphere and 550℃ under air atmosphere for 1 h respectively. Lead oxides smashed into 2 μm with density between 0.9 and 1.1 g·cm-3.Afterward β-PbO’s application on positive and negative was researched. Through the paste mixing experiments, we found that as for the positive, the optimal paste parameters were studied. When curing at low temperature, the positive plate was mainly consisted of 3BS, while high temperature cure were 4BS and 3BS. As for the negative, the plate was consisted of 3BS. Electro-chemical tests results showed that β-PbO lead powder performed with less reversibility and high polarization in positive plate. And battery tests showed P-PbO battery with 11 Ah initial capacity.1.8C discharge time was 22.5 min. Low temperature discharge capacity was 8.23 Ah, and the charge acceptance parameter was 1.914. Through the results we can tell that p-PbO lead powder is not suitable for batteries positive. As for negative application, battery tests showed β-PbO battery with 12 Ah initial capacity.1.8C discharge time was 26.35 min. Low temperature discharge capacity was 9.76 Ah, and the charge acceptance parameter was 2.485. And 100 times discharge capacity still remains 12 Ah. Results showed that β-PbO lead powder is more suitable for batteries negative application.On foundation of that, we studied α-PbO’s application on positive. Electro-chemical tests results showed that a-PbO lead powder performed stable and with good reversibility and low polarization in positive plate. And battery tests showed a-PbO battery with 13 Ah initial capacity.1.8C discha(?)ge time was 26.7 min. Low temperature discharge capacity was 9.5 Ah, and the charge acceptance parameter was 3.8. Through the results we can tell that a-PbO lead powder is suitable for batteries positive.In this paper, the basic research of lead oxide preparation through atomic economic way and the application were involved. Different crystal type of lead oxide preparation and electrochemical performance were studied, as the preliminary exploration, provide data support for the industrial application of the process.