{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["21(36)"],"submitter":["Li H"],"pubmed_abstract":["The exploration of innovative and high-efficiency energy storage materials is crucial for advancing high-performance supercapacitors. In this study, a novel composite material is synthesized, comprising multilayered MXene (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>) nanoparticles integrated with porous NiCo<sub>2</sub>Se<sub>4</sub> nanosheets. The accordion-like nanostructure of MXene and its strong interfacial interactions enhance the surface area and cycling stability of the nanocomposite. Additionally, substituting selenium (Se) for Ni-Co-based hydroxides modulates orbital hybridization with the corresponding metal cations, significantly improving electrochemical activity and reducing the adsorption/desorption energy barrier for electrolyte ions. The synergistic interaction between these two materials enabled the composite electrode to achieve a high specific capacity of 796.25 C g<sup>-1</sup> at 1 A g<sup>-1</sup> while maintaining over 90% of its initial capacity after 8000 cycles. Furthermore, the as-fabricated asymmetric hybrid capacitor, employing activated carbon as the negative electrode, delivered an energy density of 64.36 Wh kg<sup>-1</sup> at a power density of 0.8 kW kg<sup>-1</sup>, surpassing the performance of most previously reported hybrid capacitors. The developed composite structure holds significant potential for integration into various electrochemical devices, such as batteries, sensors, and electrolyzers."],"journal":["Small (Weinheim an der Bergstrasse, Germany)"],"pagination":["e04350"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12423915"],"repository":["biostudies-literature"],"pubmed_title":["Selenized Binary Transition Metals-MXene Composite for High-Performance Asymmetric Hybrid Capacitors."],"pmcid":["PMC12423915"],"pubmed_authors":["Li H","Kalaiyarasan G","Cao X","Kim W","Koo B","Ko MJ","Ali M","Lee D"],"additional_accession":[]},"is_claimable":false,"name":"Selenized Binary Transition Metals-MXene Composite for High-Performance Asymmetric Hybrid Capacitors.","description":"The exploration of innovative and high-efficiency energy storage materials is crucial for advancing high-performance supercapacitors. In this study, a novel composite material is synthesized, comprising multilayered MXene (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>) nanoparticles integrated with porous NiCo<sub>2</sub>Se<sub>4</sub> nanosheets. The accordion-like nanostructure of MXene and its strong interfacial interactions enhance the surface area and cycling stability of the nanocomposite. Additionally, substituting selenium (Se) for Ni-Co-based hydroxides modulates orbital hybridization with the corresponding metal cations, significantly improving electrochemical activity and reducing the adsorption/desorption energy barrier for electrolyte ions. The synergistic interaction between these two materials enabled the composite electrode to achieve a high specific capacity of 796.25 C g<sup>-1</sup> at 1 A g<sup>-1</sup> while maintaining over 90% of its initial capacity after 8000 cycles. Furthermore, the as-fabricated asymmetric hybrid capacitor, employing activated carbon as the negative electrode, delivered an energy density of 64.36 Wh kg<sup>-1</sup> at a power density of 0.8 kW kg<sup>-1</sup>, surpassing the performance of most previously reported hybrid capacitors. The developed composite structure holds significant potential for integration into various electrochemical devices, such as batteries, sensors, and electrolyzers.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Sep","modification":"2026-06-03T02:28:34.257Z","creation":"2026-04-23T03:10:02.026Z"},"accession":"S-EPMC12423915","cross_references":{"pubmed":["40697043"],"doi":["10.1002/smll.202504350"]}}