With a theoretical specific capacity as high as ∼4200 mAh·g−1, silicon is widely regarded as one of the most promising candidates for next-generation anode materials. Nevertheless, the practical deployment of nanosilicon remains hindered by high fabrication costs, severe volume expansion, and intrinsically low electrical conductivity, which collectively impede large-scale industrial implementation. Consequently, the development of low-cost and environmentally benign sustainable silicon sources has emerged as a major research focus. Rapid advances in green silicon sources, including natural mineral silicon, industrial waste-derived silicon, and biomass-derived silicon, not only contribute to reducing raw material costs but also offer new opportunities for resource recycling and environmental sustainability. This review systematically summarizes recent progress and future prospects of green, low-cost silicon sources for silicon-based anode materials. First, the acquisition and conversion routes of natural mineral silicon, industrial waste silicon, and biomass derived silicon are outlined. Subsequently, nanosilicon synthesis strategies based on different silicon precursors are reviewed. Thereafter, particular emphasis is placed on structural engineering, interfacial regulation, and electrochemical performance optimization of silicon-based anodes. In addition, recent developments in advanced binder systems, electrolyte selection, and prelithiation techniques are discussed. Finally, the current status and remaining challenges of green silicon sources in industrial applications are critically assessed. This review aims to advance the development of silicon-based anode materials, providing guidance for cost-effective and environmentally friendly advanced lithium-ion batteries (LIBs), and ultimately contributing to the progress of sustainable electrochemical energy storage technologies.
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