期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 26, 页码 29302-29315出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c05612
关键词
hybrid; supercapacitor; NiSe-Se; nanotube architecture; conductive; electrode
资金
- Ministry of Human Resource and Development (MHRD), India
- BSRC lab, Inha University, Incheon, Republic of South Korea
Selenium-enriched nickel selenide (NiSe-Se) nanotubes supported on highly conductive nickel foam (NiSe-Se@Ni foam) were synthesized using chemical bath deposition with the aid of lithium chloride as a shape-directing agent. The uniformly grown NiSe-Se@Ni foam, with its large number of electroactive sites, facilitated rapid diffusion and charge transport. The NiSe-Se@Ni foam electrode exhibited a superior specific capacitance value of 2447.46 F g(-1) at a current density value of 1 A g(-1) in 1 M aqueous KOH electrolyte. Furthermore, a high-energy-density pouch-type hybrid supercapacitor (HSC) device was fabricated using the proposed NiSe-Se@Ni foam as the positive electrode, activated carbon on Ni foam as the negative electrode, and a filter paper separator soaked in 1 M KOH electrolyte solution. The HSC delivered a specific capacitance of 84.10 F g(-1) at a current density of 4 mA cm(-2) with an energy density of 29.90 W h kg(-1) at a power density of 594.46 W kg(-1) for an extended operating voltage window of 1.6 V. In addition, the HSC exhibited excellent cycling stability with a capacitance retention of 95.09% after 10,000 cycles, highlighting its excellent potential for use in the hands-on applications. The real-life practicality of the HSC was tested by using it to power a red light-emitting diode.
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