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Electrochemical Performance and Stress Distribution of Sb/Sb 2 O 3 Nanoparticles as Anode Materials for Sodium-Ion Batteries.
- Source :
- Batteries; Feb2023, Vol. 9 Issue 2, p98, 18p
- Publication Year :
- 2023
-
Abstract
- We synthesize Sb/Sb<subscript>2</subscript>O<subscript>3</subscript> nanoparticles by the oxidation of Sb nanoparticles at 100, 200, and 300 °C. The half sodium-ion batteries with Sb/Sb<subscript>2</subscript>O<subscript>3</subscript>-200 exhibit the optimal performance with a charge capacity of 540 mAh g<superscript>−1</superscript> after 100 cycles at 0.1 A g<superscript>−1</superscript>, maintaining up to six times more capacity than pure Sb, and superior rate performance with 95.7% retention after cycling at varied current densities. One reason for this is that Sb/Sb<subscript>2</subscript>O<subscript>3</subscript>-200 is at exactly the optimum ratio of Sb<subscript>2</subscript>O<subscript>3</subscript>:Sb and the particle size of Sb/Sb<subscript>2</subscript>O<subscript>3</subscript> to ensure both high capacity for Na<superscript>+</superscript> and small stress during sodiation/desodiation, which is confirmed by the diffusion–stress coupled results. It indicates that increasing the ratio of Sb<subscript>2</subscript>O<subscript>3</subscript>:Sb causes a decrease of Mises equivalent stress, radial stress, and tangential stress in the range of 1:1–3.5:1, and an increase in the range of 3.5:1–4:1. These stresses decrease with a particle radius in the range of 30–50 nm and increase with a particle radius in the range of 50–70 nm. Additionally, another reason is related to the formation of cycling-induced coral-like Sb, which can promote Na<superscript>+</superscript> diffusion, relieve cycling-induced volume changes, and provide exceptional Na<superscript>+</superscript> storage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23130105
- Volume :
- 9
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Batteries
- Publication Type :
- Academic Journal
- Accession number :
- 162084663
- Full Text :
- https://doi.org/10.3390/batteries9020098