Pengran Gao,Yi Liu,Weixin Lv,Rui Zhang,Wei Liu,Xianfu Bu,Guanghua Li,Lixu Lei
Three artificial mixtures of PbSO 4 and PbO 2 as well as the active materials obtained directly from the positive plates of spent batteries have been solvothermally treated in methanol at 140 °C for 24 h, which produce mainly PbO·PbSO 4 . The PbO·PbSO 4 can be easily desulphated with ammonium carbonate to produce PbCO 3 , which can be calcined to form α-PbO to be used as positive active material of lead acid batteries . The α-PbO powders are irregular particles and highly electrochemically active, which discharges around 165 mAh g −1 at 5 mA g −1 , 80 mAh g −1 at 200 mA g −1 and 60 mAh g −1 at 400 mA g −1 with excellent cyclic stability in 50 cycles. SEM investigations show that the as-formed PbO·PbSO 4 may inherit and enhance the morphological characteristics of PbSO 4 , and carbonation of PbO·PbSO 4 does not destroy the rod-like characteristics. For the active material from the positive plates of spent lead acid batteries, the discharge capacities are 170 mAh g −1 at the current density of 5 mA g −1 , and 60 mAh g −1 at 400 mA g −1 , which is also similar. In 50 cycles, its capacity loss is only 5%.
Pengran Gao,Weixin Lv,Rui Zhang,Yi Liu,Guanghua Li,Xianfu Bu,Lixu Lei
We have developed a novel route to make new batteries from spent ones, in which we obtain and regenerate the active materials of positive electrode and negative electrode respectively. For the spent lead acid batteries , the positive electrode active materials contain both PbSO 4 and PbO 2 . To make full use of them, we have to investigate the treatment of the mixtures rather than only PbO 2 , which we have reported previously. Here we report our investigation on three mixtures of PbSO 4 and PbO 2 in different mole ratios, as well as the electrode materials directly from the spent batteries. The mixtures are firstly desulphated, and then solvothermally processed in methanol at 140 °C for 24 h. The as-obtained solids contain both PbO·PbCO 3 and PbCO 3 , which have been calcined to form α-PbO. The α-PbO powders are similar irregular particles and highly electrochemically active, which discharge around 170 mAh g −1 at 5 mA g −1 , 80 mAh g −1 at 200 mA g −1 and 60 mAh g −1 at 400 mA g −1 with excellent cyclic stability in 50 cycles.
Pengran Gao,Yi Liu,Xianfu Bu,Meng Hu,Yuan Dai,Xiaorui Gao,Lixu Lei
Lead acid batteries have been widely used and have dominated the global secondary battery market. It is very important to recycle the spent batteries efficiently to eliminate possible pollution and to ensure sustainable production. In this paper, we report our investigation on the solvothermal treatment of PbO 2 , which is one of the model compounds for the positive active mixture, in methanol and the subsequent calcination of its product. The results show that the solvothermal treatment of PbO 2 in pure methanol at 140 °C can produce a mixture of PbO and lead oxide carbonate, which can be calcined at a temperature below 500 °C to produce α-PbO. The as-prepared PbO powders are rod-like particles of about 0.5 micrometer in diameter and several micrometers in length, which can achieve a high discharge capacity of 165 mAh g −1 at the discharge current density of 5 mA g −1 , and more than 90 mAh g −1 at 200 mA g −1 with excellent cycle stability. This study demonstrates a new way for the reuse of lead dioxide in spent lead acid batteries to produce highly active PbO.
危险品化学品经营许可证（带存储）