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

作　　者：Kai Wang Xiao-Bin Zhong Yue-Xian Song Yao-Hui Zhang Yan-Gang Zhang Xiao-Gang You Pu-Guang Ji Kurbanov Mirtemir Shodievich Umedjon Khalilov Gong-Kai Wang Xin Zhang Xing-Liang Yao Feng Li Jun-Fei Liang Hua Wang 

机构地区：[1]School of Energy and Power Engineering,North University of China,Taiyuan 030051,China [2]Zhongyuan Critical Metals Laboratory,Zhengzhou University,Zhengzhou 450001,China [3]Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,School of Material Science and Engineering,Hebei University of Technology,Tianjin 300130,China [4]Arifov Institute of Ion-Plasma and Laser Technologies,Academyof Sciences of theRepublic of Uzbekistan,100077 Tashkent,Uzbekistan [5]New Uzbekistan University,100007 Tashkent,Uzbekistan [6]Arifov Institute of Ion-Plasma and Laser Technologies,Academy of Sciences of Uzbekistan,100125 Tashkent,Uzbekistan [7]University of Antwerp,2610 Antwerp,Belgium [8]School of Chemistry,Beihang University,Beijing 100191,China

出　　处：《Rare Metals》2024年第10期4948-4960,共13页稀有金属（英文版）

基　　金：financially supported by the International Cooperation Project of National Key Research and Development Program of China(No.2022YFE0126300);the National Science Foundation of Shanxi Province(Nos.202103021223175,202103021223197,202103021223204 and 20210302124097);the National Natural Science Foundation of China(Nos.21905239,22102157 and 52004051);the Fundamental Research Program of Shanxi Province(Nos.202303021211144 and 202303021221112);the Project of Zhongyuan Critical Metals Laboratory(No.GJJSGFYQ202321)。

摘　　要：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-NDC composite was designed through in situ encapsulation strategy.The obtained Si@C@SiO_(x)@PAl-NDC 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-NDC//LiFePO_(4)full cell shows its great potential in practical application.

关 键 词：Sawing silicon waste In situ encapsulation Aluminum/nitrogen co-doped Porous carbon nanowires Lithium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]