Novel recycling process recovers 97.75% silicon from end-of-life PV modules

⚡ AI Executive Summary

A research team in India has demonstrated a novel recycling method for recovering silicon from end-of-life crystalline silicon solar modules with a recovery rate of approximately 97.75%. The process involves thermal treatment, mechanical milling, and chemical purification to isolate silicon and silica compounds suitable for electrode applications in energy-storage systems. This work addresses the growing challenge of managing discarded photovoltaic modules while creating a secondary feedstock for battery technology. The development carries significant implications for the circular economy in solar energy. As global photovoltaic capacity continues to expand, downstream recycling infrastructure will become critical to both resource sustainability and waste management. Integrating recovered silicon into lithium-ion electrode fabrication creates a closed-loop system that reduces mining pressure on primary silicon sources and adds economic value to retired modules. The substrate-dependent electrochemical performance observed here—particularly the superior specific capacitance on copper and graphite collectors—suggests that recycled PV silicon could become a viable, cost-competitive alternative to virgin material in energy-storage applications, strengthening the business case for module take-back and processing networks.