Fabrication
of Mesoporous Materials Based on Supramolecular
Self-Assembly of Guanosine Monophosphonate-Nickel Chloride (GMP-Ni)
for High-Performance Hybrid Supercapacitors
posted on 2024-01-25, 20:03authored byMadan
R. Biradar, Amol M. Kale, Chepuri R. K. Rao, Byung C. Kim, Sidhanath V. Bhosale, Sheshanath V. Bhosale
Supramolecular self-assembly of nickel
chloride and guanosine mono-phosphonate
(GMP) and nickel (Ni)-based GMP-Ni and their calcinated mesoporous
electrode materials GMP-Ni-500 and GMP-Ni-700 at 500 and 700 °C,
respectively, have been fabricated. GMP-Ni, GMP-Ni-500, and GMP-Ni-700
are examined for their supercapacitor performance in a three-electrode
configuration. The electrochemical tests demonstrate the mesoporous
battery-type nature of GMP-Ni-500 which exhibited a specific capacity
(Cs) of about 289 C g–1 at 0.5 A g–1 current density. In addition, a cost-effective
and simple asymmetric supercapacitor device has been fabricated with
battery-type GMP-Ni-500 as a cathode material and capacitive-type
activated carbon (AC) as an anodic material. In an operating voltage
window of 0 to 1.5 V, hybrid supercapacitors (HSCs) based on GMP-Ni-500//AC
exhibited a remarkable performance with a specific capacity (Cs) of 144 C g–1 at 0.5 A g–1. For the HSC device, the maximum of 66% capacity
retention has been observed after 5000 charging/discharging cycles
at 5 A g–1. Furthermore, the HSC device demonstrates
a high energy density of 24 W h kg–1 at a power
density of 297 W kg–1. The molecular transformation
was established by employing theoretical calculations. These results
suggest that our HSC has outstanding potential in technology development
for next-generation commercial applications.