Recycling spent lead acid batteries into aqueous zinc-ion battery material with ultra-flat voltage platforms
Recycling spent lead acid batteries into aqueous zinc-ion battery material with ultra-flat voltage platforms
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DOI：
10.1016/j.ceramint.2022.05.253
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发表时间：
2022-05
影响因子：
5.2
通讯作者：
Chun Lin;Yue Chen;Weijian Zhang;Jiaxin Li;Yingbin Lin;O. Kolosov;Zhigao Huang
中科院分区：
文献类型：
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作者：
Chun Lin;Yue Chen;Weijian Zhang;Jiaxin Li;Yingbin Lin;O. Kolosov;Zhigao Huang
废旧铅酸蓄电池(实验室)中铅膏的无害化处理在传统的火法回收中仍然是一个巨大的挑战。在这里，我们介绍了一种回收废旧实验室废物的湿法冶金方法，以获得新型锌离子电池活性材料β-PbO。得到的β-PbO具有超平的充放电电压平台(0.21 mV/(mAhg−1))和稳定的比容量。在充放电过程中，β-PbO自发触发形成(ZnSO4)[Zn(OH)2]3·5H2O(ZHS)微片作为表面钝化层。X-射线衍射谱表明，通过调节电极-电解液界面的PH值，在ZHS的辅助下，PbSO4和PbSO4之间发生了可逆的相变。协同两相反应机制在充放电时产生超平坦的电压平台。与传统的火法回收相比，这种“节能环保”的回收路线消除了污染颗粒/气体的主要排放源，同时取代了目前合成ZIB阴极的耗能和对环境有害的工艺。
The harmless disposal of lead paste in the spent lead-acid batteries (LABs) remains an enormous challenge in traditional pyrometallurgical recycling. Here, we introduced a hydrometallurgical method for the recycling of the spent LABs’ waste to obtain theβ-PbO as a novel zinc ion batteries (ZIBs) active material. The obtainedβ-PbO exhibits ultra-flat charge/discharge voltage platforms (0.21 mV/(mAh g−1)) and stable specific capacity. During the charge/discharge, theβ-PbO spontaneously triggers the formation of (ZnSO4)[Zn(OH)2]3·5H2O (ZHS) micro-sheets as a surface passivation layer. Moreover, theex-situX-ray spectra reveal that the reversible phase transformation occurs between PbSO4and Pb with the assistance of ZHS by adjusting the PH value on the electrode-electrolyte interface. The synergistic two-phase-reaction mechanism generates ultra-flat voltage platforms upon the charge/discharge. This “energy-saving and environment-friendly” recycling route eliminates the major source of emission of pollution particulates/gases compared to the traditional pyrometallurgical recycling, while at the same time replacing energy-consuming and environmentally detrimental processes of synthesis of current ZIBs cathodes.