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-Fe2O3@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-Fe2O3 nanocubes resulting in the formation of α-Fe2O3@rGO core@shell nanocubes in a gram-scale. The synthesized α-Fe2O3@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-Fe2O3@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-Fe2O3@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.
Bibliographical noteFunding Information:
This work was mainly supported by Brain Pool Program through the National Research Foundation of Korea (NRF) , funded by the Ministry of Science and ICT (Grant no. 2019H1D3A1A01070498 ). We also gratefully acknowledge financial support from the Korea Institute of Science and Technology (KIST) institutional and KU-KIST programs (Project No. 2E31161 ) and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. NRF-2019R1A2C2005657 ).
© 2021 The Authors
- Economical approach
- Electrode materials
- Energy storage devices
- Sodium-ion batteries (SIBs)
- Specific capacity
- α-FeO@rGO core@shell nanocubes
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering