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000904272 0247_ $$2doi$$a10.1016/j.cej.2020.126603
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000904272 1001_ $$aMüller, Jannes$$b0
000904272 245__ $$aSi-on-Graphite fabricated by fluidized bed process for high-capacity anodes of Li-ion batteries
000904272 260__ $$aAmsterdam$$bElsevier$$c2021
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000904272 520__ $$aComposites consisting of graphite and silicon have been considered as potential high-capacity anode materials for the next-generation Li-ion batteries (LIBs). The synthesis method is critical for determining the microstructure, which is directly related to the material performance and the cost-efficiency for making commercial electrode materials. Herein, we report the fabrication of silicon-on-graphite (Si@Gr) composites by fluidized bed granulation (FBG) for the first time. The FBG process is shown to produce composite powders comprising a uniform layer of nano-sized Si particles lodged onto the surface of micron-sized graphite particles to possess a core-shell microstructure. Adopting a suitable binder during the FBG process enables a firm adhesion of the Si nanoparticles on graphite surface during subsequent carbon-coating, where the composite particles are coated with pitch and then carbonised to form a highly electronically conductive and mechanical stabilizing layer of amorphous carbon. These carbon-coated composites exhibit a high capacity reaching over 600 mAh g−1, high rate capability and illustrates the potential of long-cycle stability in Si@Gr || Li metal cells, showing more than 70% capacity retention after 400 charge-discharge cycles even without electrolyte optimization. Furthermore, a significantly improved cycling stability is found for the carbon-coated Si@Gr materials in LiNi0.6Co0.2Mn0.2O2 (NCM-622) || Si@Gr full-cells.
000904272 536__ $$0G:(DE-HGF)POF4-1221$$a1221 - Fundamentals and Materials (POF4-122)$$cPOF4-122$$fPOF IV$$x0
000904272 536__ $$0G:(BMBF)13XP0133A$$aLiBEST - Lithium-Ionen-Akku mit hoher elektrochemischer Leistung und Sicherheit (13XP0133A)$$c13XP0133A$$x1
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000904272 7001_ $$aAbdollahifar, Mozaffar$$b1
000904272 7001_ $$aVinograd, Andrey$$b2
000904272 7001_ $$aNöske, Markus$$b3
000904272 7001_ $$aNowak, Christine$$b4
000904272 7001_ $$aChang, Shu-Jui$$b5
000904272 7001_ $$0P:(DE-HGF)0$$aPlacke, Tobias$$b6
000904272 7001_ $$0P:(DE-HGF)0$$aHaselrieder, Wolfgang$$b7
000904272 7001_ $$0P:(DE-Juel1)166130$$aWinter, Martin$$b8
000904272 7001_ $$0P:(DE-HGF)0$$aKwade, Arno$$b9
000904272 7001_ $$0P:(DE-HGF)0$$aWu, Nae-Lih$$b10$$eCorresponding author
000904272 773__ $$0PERI:(DE-600)2012137-4$$a10.1016/j.cej.2020.126603$$gVol. 407, p. 126603 -$$p126603 -$$tThe chemical engineering journal$$v407$$x1385-8947$$y2021
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