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Electrodeposited Stable Binder‐Free Organic Ni(OH) 2 Flexible Nanohybrid Electrodes for High‐Performance Supercapacitors
Author(s) -
Singh Devraj,
Jadhav Rohit G.,
Das Apurba K.
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900546
Subject(s) - supercapacitor , materials science , chemical engineering , x ray photoelectron spectroscopy , scanning electron microscope , transmission electron microscopy , fourier transform infrared spectroscopy , electrochemistry , nickel , electrode , nanotechnology , chemistry , metallurgy , composite material , engineering
Organic–inorganic hybrid materials with nanoscale morphologies gain significant attention as a potential candidate for energy storage applications. Herein, nickel hydroxide (Ni(OH) 2 ) and benzo[2,1,3]selenadiazole (BSe)‐capped dipeptide amphiphiles are electrodeposited over flexible nickel foam (NF) substrates to fabricate organic–inorganic nanohybrids. The in situ electrochemical deposition of organic–inorganic nanohybrids is investigated by Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, energy dispersive‐electron microscopy, and elemental mapping. The nanostructured morphology of the nanohybrid material is investigated by field‐emission scanning electron microscopy and transmission electron microscopy. The electrochemical performance and supercapacitor properties are examined in 1 m KOH aqueous solution. Aromatic diphenylalanine (FF)‐based nanohybrid BSeFF/Ni(OH) 2 deposited on the NF electrode exhibit a specific capacitance of 1250 F g −1 , whereas dileucine (LL)‐based nanohybrids BSeLL/Ni(OH) 2 show a specific capacitance of 689 F g −1 at a current density of 2 A g −1 .