Recovery of nano-structured silicon from end-of-life photovoltaic wafers with value-added applications in lithium-ion battery

Nicolas Eshraghi, Loris Berardo, Audrey Schrijnemakers, Vincent Delaval, Mahdokht Shaibani, Mainak Majumder, Rudi Cloots, Bénédicte Vertruyen, Frédéric Boschini, Abdelfattah Mahmoud

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)

Abstract

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

Original languageEnglish
Pages (from-to)5868-5879
Number of pages12
JournalACS Sustainable Chemistry and Engineering
Volume8
Issue number15
DOIs
Publication statusPublished - 20 Apr 2020

Keywords

  • Ball milling
  • Photovoltaic panel
  • Recovery
  • Recycling
  • Silicon anode
  • Sustainable

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