Gram-scale synthesis of rGO wrapped porous α-Fe2O3 as an advanced anode material for Na-ion batteries with superior cyclic stability. (1st September 2021)

• Record Type: Journal Article
• Authors: Kandula, Syam; Bae, Junho; Cho, Jinhan; Son, Jeong Gon
• Is Part Of: Composites. Number 220(2021)
• Publication Date: 2021-09-01
• Subjects: α-Fe2O3@rGO core@shell nanocubes -- Economical approach -- Sodium-ion batteries (SIBs) -- Electrode materials -- Energy storage devices -- Specific capacity; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2021.108995
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: Synthesis of various earth-abundant electroactive materials in gram-scale via simple methods with excellent efficiency can effectively reduce the cost. In this context, we have demonstrated a gram-scale synthesis of α-Fe2 O3 @rGO core@shell nanocubes via a direct solution route. By the concept of charge-charge interactions, we have successfully wrapped the reduced graphene oxide (rGO) over the surface of α-Fe2 O3 nanocubes resulting in the formation of α-Fe2 O3 @rGO core@shell nanocubes in a gram-scale. The synthesized α-Fe2 O3 @rGO core@shell nanocubes were characterized by a group of analytical methods and finally explored as an effective anode material for sodium-ion batteries (SIBs). The α-Fe2 O3 @rGO-10 wt% core@shell nanocubes sample displays an exceptional specific capacity of 970.2 mAh g −1 at 0.1 C-rate with a better rate capability of 77.8 mAh g −1 at 5.0 C-rate. Moreover, the α-Fe2 O3 @rGO-10 wt% sample also demonstrates a better specific capacity of about 586.9 mAh g −1 after 100 cycles at 0.1 C-rate. The current approach can enable the synthesis of various electroactive materials on a gram-scale using a cost-effective strategy with better electrochemical performance for practical energy storage devices. Graphical abstract: Image 1 Highlights: Gram-scale synthesis of α-Fe2 O3 @rGO core@shell nanocubes via economical route is demonstrated. Effective freestanding electrodes were fabricated with the help of SWCNTs via vacuum filtering. The α-Fe2 O3 @rGO core@shell nanocubes display a better specific capacity of about 970.2 mAh g −1 at 0.1 C-rate for SIBs. The α-Fe2 O3 @rGO core@shell nanocubes show a specific capacity of about 586.9 mAh g −1 after 100 cycles at 0.1 C-rate for SIBs.