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Rational design and regulation of tremella-like selenium-doped MoS2 for highly reversible sodium storage.
- Source :
- Journal of Materials Chemistry A; 1/28/2023, Vol. 11 Issue 4, p1954-1965, 12p
- Publication Year :
- 2023
-
Abstract
- Molybdenum disulfide (MoS<subscript>2</subscript>), due to its high theoretical specific capacity (670 mA h g<superscript>−1</superscript>), has evoked considerable investigation interest in the area of Na<superscript>+</superscript> storage. Nonetheless, the irreversible conversion of the original material MoS<subscript>2</subscript> into Mo/Na<subscript>2</subscript>S during sodium insertion incurs rapid capacity degradation. Herein, to avoid this severe irreversibility, Na<subscript>y</subscript>MoS<subscript>2</subscript> is employed to replace the above irreversible products to facilitate subsequent sodium extraction, achieving reversible transformation of the raw material. In order to accomplish this goal, tremella-like hollow MoS<subscript>2(1−x)</subscript>Se<subscript>2x</subscript>@C (x = 0, 0.1, 0.25, 0.5) spheres are elaborately prepared and then act as an appropriate anode material exhibiting good sodium storage capacity. It is proved that doping with Se and regulating the cut-off voltage improve the layer spacing and bond strength, so that the Mo–S bond is maintained without irreversible change during the sodium storage process. This work delivers a practical strategy to modify the energy storage ability via reversible transformation of the original material and proposes an appropriate Se doping amount, demonstrating effective measures for constructing a relevant advanced anode. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 11
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 161481024
- Full Text :
- https://doi.org/10.1039/d2ta08777d