The interfacial electronic engineering in polyhedral MOF derived Co-doped NiSe2 composite for upgrading rate and longevity performance of aqueous energy storage

• Published in: Journal of alloys and compounds Vol. 897; p. 163187
• Main Authors: Yang, Jun, Hou, Wenxiu, Pan, Run, Zhou, Mu, Zhang, Shuozhou, Zhang, Yu
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.03.2022; Elsevier BV
• Subjects: Aqueous supercapacitors; Electronic engineering; Energy storage; Interfacial electronic engineering; Metal-organic frameworks; MOFs; Porous; Pseudocapacitance; Selenides; Spectrum analysis; Supercapacitors; Transition metal selenides; Transition metals; Aqueous supercapacitors; Interfacial electronic engineering; MOFs; Transition metal selenides; Pseudocapacitance; Porous
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.163187

Transition metal selenides have sparked widespread interest in energy-related applications due to their unique physicochemical properties. Herein, polyhedral Co- doped NiSe2 (Co-NiSe2) is designed and built using MOFs as a template. The porous and electronic connected Co-NiSe2/rGO, which inherits the advantages of MOFs and has rGO uniformly covered, shows potential in the application of aqueous supercapacitors (SCs). The Co-NiSe2/rGO electrode for SCs has a high reversible capacity of 648 F g−1 at a current density of 10 A g−1 after 1500 cycles of continuous discharging/charging. In-situ Raman spectral analysis is also used to investigate the electrochemical mechanism of Co-NiSe2/rGO in the application of SCs. The concept of building electronic interconnected porous structured transition metal selenides can be expanded into a common methodology for advanced electrode in SCs. The electronic-connected porous Co-NiSe2/rGO shows the improved performance in aqueous supercapacitors. [Display omitted] •MOF derived polyhedral Co-doped NiSe2 with rGO covered is synthesized.•The electrode has the electronic interconnected porous structure.•The exquisite boundary architecture is beneficial to improving the kinetics.•The electrode exhibits high-rate performance in aqueous energy storage.