TY - JOUR
T1 - Ball-milling route to design hierarchical nanohybrid cobalt oxide structures with cellulose nanocrystals interface for supercapacitors
AU - Palem, Ramasubba Reddy
AU - Shimoga, Ganesh
AU - Rabani, Iqra
AU - Bathula, Chinna
AU - Seo, Young Soo
AU - Kim, Hyun Seok
AU - Kim, Sang Youn
AU - Lee, Soo Hong
N1 - Publisher Copyright:
© 2022 John Wiley & Sons Ltd.
PY - 2022/5
Y1 - 2022/5
N2 - Nanocellulose materials are promising sustainable and environmentally friendly candidates for green and renewable energy storage applications. Herein, hierarchical Co3O4@CNC nanohybrid structure was fabricated in conjunction with cobalt acetate tetrahydrate and cellulose nanocrystals (CNC) as a bio-carbon source using green ball-milling pathway for the first time. For comparison, pristine Co3O4 nanostructure was prepared using a similar method without adding CNC. The structural and morphological characteristics of nanohybrid composites were investigated using X-ray diffractometer (XRD), Raman, X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) techniques. Furthermore, the electrochemical properties of the nanohybrid composites evaluated using cyclic voltammetry (CV), Galvanostatic Charge-Discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. The hierarchical Co3O4@CNC nanohybrid electrode showed the highest specific capacitance of 396 F/g that of pristine Co3O4 nanostructure electrode (was 268 F/g) at a current density of 1.0 A/g for a three-electrode assembly. The hierarchical Co3O4@CNC nanohybrid electrode showed appreciable capacitive behavior with 96% cyclic retention even after 5,000 cycles at 1.0 A/g with energy density of 12.5 Wh k−1 at a power density of 230.5 W k−1. Thus, it is suitable for improving and/or designing active electrocatalysts for enhanced supercapacitor applications.
AB - Nanocellulose materials are promising sustainable and environmentally friendly candidates for green and renewable energy storage applications. Herein, hierarchical Co3O4@CNC nanohybrid structure was fabricated in conjunction with cobalt acetate tetrahydrate and cellulose nanocrystals (CNC) as a bio-carbon source using green ball-milling pathway for the first time. For comparison, pristine Co3O4 nanostructure was prepared using a similar method without adding CNC. The structural and morphological characteristics of nanohybrid composites were investigated using X-ray diffractometer (XRD), Raman, X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) techniques. Furthermore, the electrochemical properties of the nanohybrid composites evaluated using cyclic voltammetry (CV), Galvanostatic Charge-Discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. The hierarchical Co3O4@CNC nanohybrid electrode showed the highest specific capacitance of 396 F/g that of pristine Co3O4 nanostructure electrode (was 268 F/g) at a current density of 1.0 A/g for a three-electrode assembly. The hierarchical Co3O4@CNC nanohybrid electrode showed appreciable capacitive behavior with 96% cyclic retention even after 5,000 cycles at 1.0 A/g with energy density of 12.5 Wh k−1 at a power density of 230.5 W k−1. Thus, it is suitable for improving and/or designing active electrocatalysts for enhanced supercapacitor applications.
KW - ball-milling
KW - cellulose nanocrystal
KW - cobalt oxide
KW - hierarchical nanostructure
KW - supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85124421699&partnerID=8YFLogxK
U2 - 10.1002/er.7744
DO - 10.1002/er.7744
M3 - Article
AN - SCOPUS:85124421699
SN - 0363-907X
VL - 46
SP - 8398
EP - 8412
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 6
ER -