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Hierarchical carbon nanosheet confined defective MoSx cathode towards long-cycling zinc-ion-battery.
- Source :
- Nano Research; Jul2023, Vol. 16 Issue 7, p9364-9370, 7p
- Publication Year :
- 2023
-
Abstract
- Aqueous zinc-ion batteries (ZIBs) have attracted increasing attention due to their low cost and high safety. MoS<subscript>2</subscript> is a promising cathode material for aqueous ZIBs due to its favorable Zn<superscript>2+</superscript> accommodation ability. However, the structural strain and large volume changes during intercalation/deintercalation lead to exfoliation of active materials from substrate and cause irreversible capacity fading. In this work, a highly stable cathode was developed by designing a hierarchical carbon nanosheet-confined defective MoS<subscript>x</subscript> material (CNS@MoS<subscript>x</subscript>). This cathode material exhibits an excellent cycling stability with high capacity retention of 88.3% and ∼ 100% Coulombic efficiency after 400 cycles at 1.2 A·g<superscript>−1</superscript>, much superior compared to bare MoS<subscript>2</subscript>. Density functional theory (DFT) calculations combined with experiments illustrate that the promising electrochemical properties of CNS@MoS<subscript>x</subscript> are due to the unique porous conductive structure of CNS with abundant active sites to anchor MoS<subscript>x</subscript> via strong chemical bonding, enabling MoS<subscript>x</subscript> to be firmly confined on the substrate. Moreover, this unique hierarchical complex structure ensures the fast migration of Zn<superscript>2+</superscript> within MoS<subscript>x</subscript> interlayer. [ABSTRACT FROM AUTHOR]
- Subjects :
- CATHODES
DENSITY functional theory
CHEMICAL bonds
SUPERCAPACITOR electrodes
CARBON
Subjects
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 16
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 169750711
- Full Text :
- https://doi.org/10.1007/s12274-023-5572-7