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Recovery of Nano-Structured Silicon from End-of-Life Photovoltaic Wafers with Value-Added Applications in Lithium-Ion Battery
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-03-27 , DOI: 10.1021/acssuschemeng.9b07434
Nicolas Eshraghi 1 , Loris Berardo 1 , Audrey Schrijnemakers 1 , Vincent Delaval 1 , Mahdokht Shaibani 2 , Mainak Majumder 2 , Rudi Cloots 1 , Bénédicte Vertruyen 1 , Frédéric Boschini 1 , Abdelfattah Mahmoud 1
Affiliation  

Millions of residential and industrial solar panels installed in the late 1980s and early 1990s are approaching the end of their life, resulting in the drastic accumulation of a potential source of environmental pollution—given the presence of hazardous materials, such as lead. The foreseen crisis, however, can be turned into a great opportunity by value-added recovery of precious solar-grade silicon (Si) to the highly desired nanostructured silicon for lithium-ion batteries (LIBs). Herein, we demonstrate a potential end-of-life management option for photovoltaic (PV) panels, representing a step toward producing greener and more energy-efficient Si for batteries. We show that leaching the recovered silicon wafers in critically tuned alkali-acid leaching baths effectively removes the major impurities: lead (Pb), silver (Ag), and aluminum (Al). The ultrapure Si is then nanosized via industrially scalable milling routes to meet the requirements of expansion-tolerant Si anodes for LIBs delivering capacities as high as 1400 mAh g–1.

中文翻译:

从报废光伏晶片中回收纳米结构硅,并在锂离子电池中实现增值应用

1980年代末和1990年代初安装的数以百万计的住宅和工业用太阳能电池板正接近使用寿命,由于存在铅等有害物质,导致潜在的环境污染源急剧积累。但是,通过将珍贵的太阳能级硅(Si)增值回收到锂离子电池(LIBs)高度期望的纳米结构硅中,可以将可预见的危机变成一个巨大的机会。本文中,我们演示了光伏(PV)面板的潜在报废管理选项,代表了朝着生产更绿色,更节能的电池Si迈出的一步。我们表明,在经过严格调整的碱酸浸出浴中浸出回收的硅晶片可有效去除主要杂质:铅(Pb),银(Ag)和铝(Al)。–1
更新日期:2020-04-23
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