Ultrathin Ti 3 C 2 T x (MXene) Nanosheet-Wrapped NiSe 2 Octahedral Crystal for Enhanced Supercapacitor Performance and Synergetic Electrocatalytic Water Splitting

Hanmei Jiang, Zegao Wang, Qian Yang, Luxi Tan, Lichun Dong, Mingdong Dong*

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

Abstract: Metal selenides, such as NiSe 2 , have exhibited great potentials as multifunctional materials for energy storage and conversation. However, the utilization of pure NiSe 2 as electrode materials is limited by its poor cycling stability, low electrical conductivity, and insufficient electrochemically active sites. To remedy these defects, herein, a novel NiSe 2 /Ti 3 C 2 T x hybrid with strong interfacial interaction and electrical properties is fabricated, by wrapping NiSe 2 octahedral crystal with ultrathin Ti 3 C 2 T x MXene nanosheet. The NiSe 2 /Ti 3 C 2 T x hybrid exhibits excellent electrochemical performance, with a high specific capacitance of 531.2 F g −1 at 1 A g −1 for supercapacitor, low overpotential of 200 mV at 10 mA g −1 , and small Tafel slope of 37.7 mV dec −1 for hydrogen evolution reaction (HER). Furthermore, greater cycling stabilities for NiSe 2 /Ti 3 C 2 T x hybrid in both supercapacitor and HER have also been achieved. These significant improvements compared with unmodified NiSe 2 should be owing to the strong interfacial interaction between NiSe 2 octahedral crystal and Ti 3 C 2 T x MXene, which provides enhanced conductivity, fast charge transfer as well as abundant active sites, and highlight the promising potentials in combinations of MXene with metal selenides for multifunctional applications such as energy storage and conversion.[Figure not available: see fulltext.].

Original languageEnglish
Article number31
JournalNano-Micro Letters
Volume11
Issue1
Number of pages14
ISSN2311-6706
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • MXene
  • NiSe
  • Supercapacitor
  • Water splitting

Fingerprint

Dive into the research topics of 'Ultrathin Ti 3 C 2 T x (MXene) Nanosheet-Wrapped NiSe 2 Octahedral Crystal for Enhanced Supercapacitor Performance and Synergetic Electrocatalytic Water Splitting'. Together they form a unique fingerprint.

Cite this