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Regeneration of photovoltaic industry silicon waste toward high‐performance lithium‐ion battery anode

Kai WangSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaXiaobin ZhongSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaYuexian SongSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaYaohui ZhangSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaYangang ZhangSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaXiaogang YouZhongyuan Critical Metals Laboratory Zhengzhou University 450001 Zhengzhou ChinaPuguang JiTianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Material Science and Engineering Hebei University of Technology 300130 Tianjin ChinaKurbаnov Mirtemir ShodievichArifov Institute of Ion‐Plasma and Laser Technologies Academy of Sciences of the Republic of Uzbekistan 100077 Tashkent UzbekistanUmedjon KhalilovArifov Institute of Ion‐Plasma and Laser Technologies Academy of Sciences of Uzbekistan 100125 Tashkent UzbekistanGongkai WangTianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Material Science and Engineering Hebei University of Technology 300130 Tianjin ChinaXin ZhangTianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Material Science and Engineering Hebei University of Technology 300130 Tianjin ChinaXing-Liang YaoSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaFeng LiSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaJunfei LiangSchool of Energy and Power Engineering North University of China 030051 Taiyuan ChinaHua WangSchool of Chemistry Beihang University 100191 Beijing China

Rare Metalsjournal2024en

ABI

Annotatsiya

Abstract The diamond‐wire sawing silicon waste (DWSSW) from the photovoltaic industry has been widely considered as a low‐cost raw material for lithium‐ion battery silicon‐based electrode, but the effect mechanism of impurities presents in DWSSW on lithium storage performance is still not well understood; meanwhile, it is urgent to develop a strategy for changing DWSSW particles into high‐performance electrode materials. In this work, the occurrence state of impurities presents in DWSSW was carefully analyzed using in situ Ar ion etching technology. Then, the novel Si@C@SiO x @PAl‐N–C composite was designed through in situ encapsulation strategy. The obtained Si@C@SiO x @PAl‐N–C electrode shows a high first capacity of 2343.4 mAh·g −1 with an initial Coulombic efficiency (ICE) of 84.4% under current density of 1.0 A·g −1 , and can deliver an impressive capacity of 984.9 mAh·g −1 after 200 cycles. Combined numerical simulation modeling calculations, the increase in proportion of Si 4+ /Si 0 and Si 3+ /Si 0 valence states in SiO x layer leads to a decrease in von Mises stress, which ultimately improves the cycling structural stability. Meanwhile, the porous 2D–3D aluminum/nitrogen (Al/N) co‐doped carbon layer and nanowires on SiO x layer can provide abundant active sites for lithium storage due to its developed hierarchical pores structure, which facilitates ion transport. What is more, the performance of Si@C@SiO x @PAl‐N–C//LiFePO 4 full cell shows its great potential in practical application.

Mavzular

Advancements in Battery Materials Extraction and Separation Processes Advanced Battery Technologies Research

Identifikatorlar

DOI: 10.1007/s12598-024-02783-w

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