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Sea Urchin-Like NiCo-LDH Hollow Spheres Anchored on 3D Graphene Aerogel for High-Performance Supercapacitors.
- Source :
-
ChemSusChem [ChemSusChem] 2024 Jun 18, pp. e202400142. Date of Electronic Publication: 2024 Jun 18. - Publication Year :
- 2024
- Publisher :
- Ahead of Print
-
Abstract
- To enhance the inherent poor conductivity and low cycling stability of dimetallic layered double hydroxides (LDHs) materials, designing a synergistic effect between EDLC capacitors and pseudocapacitors is an efficient strategy. In this paper, we utilized a solvothermal technique employing Co-glycerate as a precursor to prepare sea urchin-like NiCo-LDH hollow spheres anchored on a 3D graphene aerogel. The unique morphology of these hollow microspheres significantly expand the specific surface area and exposes more active sites, while reducing the volume changes of materials during long-term charging and discharging processes. The 3D graphene aerogel serves as a conductive skeleton, improving the material's electrical conductivity and buffering high current. The sea urchin-like NiCo-LDH hollow spheres anchored on 3D graphene aerogel (H-NiCo-LDH@GA) has a specific surface area of 51 m <superscript>2</superscript> g <superscript>-1</superscript> and the I <subscript>D</subscript> /I <subscript>G</subscript> value is 1.02. The H-NiCo-LDH@GA demonstrate a significant specific capacitance of 236.8 mAh g <superscript>-1</superscript> at 1 A g <superscript>-1</superscript> , with a remarkable capacity retention rate of 63.1 % even at 20 A g <superscript>-1</superscript> . Even after 8000 cycles at 10 A g <superscript>-1</superscript> , the capacity retention still remains at 96.3 %, presenting excellent cycling stability.<br /> (© 2024 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1864-564X
- Database :
- MEDLINE
- Journal :
- ChemSusChem
- Publication Type :
- Academic Journal
- Accession number :
- 38888714
- Full Text :
- https://doi.org/10.1002/cssc.202400142