Lower limit to Si-dimension for retaining graphenic carbon based 'buffer' effective towards bestowing Si-electrodes with cyclic stability. (15th September 2020)

• Record Type: Journal Article
• Authors: Jangid, Manoj K.; Sonia, Farjana J.; Aslam, M.; Mukhopadhyay, Amartya
• Is Part Of: Carbon. Volume 165(2020)
• Page Start: 428
• Page End: 433
• Publication Date: 2020-09-15
• Subjects: Nanoscaled si -- Graphene -- Si/graphene interface -- Cyclic stability -- Dimensional effect; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.04.094
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: The main avenue towards improving cyclic stability of Si-based anodes for Li-ion batteries has been the incorporation of graphene-based 'buffer' interlayer. In this context, we bring to the fore a concept concerning the existence of a lower limit to the dimensional scale of Si, below which the effectiveness of graphene-based interlayer towards improving cyclic stability of Si-based electrodes may cease. Our studies have indicated that the concerned effectiveness of graphene-based interlayer breaks down for Si-dimension ≤ ∼50 nm, because the, otherwise, relatively constraint free dilation/contraction (upon lithiation/delithiation) of Si at Si/graphene interface (unlike at Si/Cu interface) no longer remains unconstrained. Graphical abstract: Image 1