From scaled-up production of silicon-graphene nanocomposite to the realization of an ultra-stable full-cell Li-ion battery. (6th April 2021)

• Record Type: Journal Article
• Authors: Abouali, Sara; Garakani, Mohammad Akbari; Silvestri, Laura; Venezia, Eleonora; Marasco, Luigi; Brescia, Rosaria; Ansaldo, Alberto; Serri, Michele; Panda, Jaya Kumar; Pugliese, Giammarino; Mantero, Elisa; Bonaccorso, Francesco; Pellegrini, Vittorio
• Is Part Of: 2D materials. Volume 8:Number 3(2021)
• Publication Date: 2021-04-06
• Subjects: silicon -- graphene -- nanocomposite anode -- high capacity anode -- Li-ion full cell; Graphene -- Periodicals; Materials science -- Periodicals; Nanostructured materials -- Periodicals; 620.115
• DOI: 10.1088/2053-1583/abe106
• Languages: English
• ISSNs: 2053-1583

Abstract

Abstract: The realization of a high-performance Li-ion full-cell with an anode prominently based on silicon, which can surpass the energy densities of commercial graphite-based Li-ion batteries and cyclability compatible for industrial applications, is still a challenge. Here, we report a Li-ion full-cell that combines a silicon/graphene/carbon (Si/G/C) nanocomposite anodic material, with a commercial LiNi0.33 Mn0.33 Co0.33 O2 (NMC111 ) cathode. Using a pre-lithiation technique, the proposed Li-ion full-cell exhibits an energy density of ∼400 Wh kg −1 at the electrode material level, with a capacity >1.6 mAh cm −2 and a capacity retention exceeding 90% after 300 cycles at C/2. These performances have been achieved by properly designing the anode material composed by Si nanoparticles wrapped by few-layer graphene flakes. An additional carbon coating is used to further improve the electron conductivity and mechanical integrity of the anodic structure upon charge/discharge cycles. The remarkable performance of the full-cell considering the scalability of the Si-based anode synthesis is a step forward towards the commercialization of high-capacity and high-energy density Li-ion batteries.