About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thermodynamics for Sustainability: An EPD Symposium in Honor of Kazuki Morita
|
| Presentation Title |
Upcycling Photovoltaic Silicon Waste Into High-Entropy Anodes for Lithium-Ion Batteries via Compensation Method |
| Author(s) |
Yi Zeng, Yongsheng Ren, Wenhui Ma, Zhuoxu Cai |
| On-Site Speaker (Planned) |
Yongsheng Ren |
| Abstract Scope |
With the vigorous development of the photovoltaic industry, silicon wafer demand continues to surge, resulting in approximately 35% of 6N-grade high-purity silicon becoming silicon powder waste during diamond wire sawing. To achieve high-value recycling and mitigate environmental burdens, this study utilizes the waste to develop high-entropy lithium-ion battery anodes through a vacuum solvent refining with directional impurity removal and compensation regulation strategy. By leveraging the intrinsic high purity, fine particle size, and multi-metal doping properties of the silicon waste, we innovatively establish a synergistic mechanism integrating targeted impurity purification and in-situ beneficial element compensation. This approach avoids complex deep-purification processes while effectively alleviating volume expansion in silicon-based anodes. Our work explores core scientific challenges in silicon waste recycling and anode performance modulation, providing theoretical support and a technical paradigm for establishing a closed-loop photovoltaic-energy storage industry chain while offering significant practical implications for advancing carbon peaking and carbon neutrality goals. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Pyrometallurgy, Recycling and Secondary Recovery |