TY - JOUR
T1 - Self-Heteroatom-Doped Garlic-Derived Porous Activated Carbon for a High-Energy-Density Supercapacitor
AU - Siddiqa, Aisha
AU - Sushmitha, D. J.
AU - Nagaraja, K. K.
AU - Nagaraju, D. H.
AU - Padaki, Mahesh
N1 - Funding Information:
The authors are grateful to the Department of Science and Technology (DST/TMD/MES/2k17/61), India for funding the project, and A.S.R. is thankful to the Directorate of Minorities, Government of Karnataka, India, for fellowship (Ref. No. DOM/FELLOWSHIP/CR-82/2018-19).
Publisher Copyright:
© 2023, The Minerals, Metals & Materials Society.
PY - 2023/3
Y1 - 2023/3
N2 - Carbonaceous materials derived from biomass have recently gained tremendous importance. In this regard, we fabricated a high-energy-density symmetric device using garlic (Allium sativa)-derived self-heteroatom-doped activated carbon (GAC) synthesized via KOH activation at three different temperatures for supercapacitor application. The sample designated as GAC-900 with high specific surface area of 2300 m2/g and high pore volume of 1.126 cm3/g revealed the best results among the three prepared samples, with specific capacitance of 341 F/g at 1 A/g in a three-electrode configuration. It was evident that the GAC-900 material had a sufficient amount of heteroatoms of oxygen, nitrogen, sulfur and a minute quantity of phosphorous which could increase the charge storage performance by imparting pseudocapacitance. The constructed symmetric Swagelok cell GAC-900//GAC-900 device attained remarkable energy density of 33.83 Wh/kg at 600 W/kg, and significant power density of 24,000 W/kg was achieved with energy density of 14.66 Wh/kg. GAC-900//GAC-900 was tested for cyclic stability with 5000 charge–discharge cycles at 5 A/g and exhibited coulombic efficiency of 99.95% with capacitance retention of 95%. Graphical Abstract: [Figure not available: see fulltext.].
AB - Carbonaceous materials derived from biomass have recently gained tremendous importance. In this regard, we fabricated a high-energy-density symmetric device using garlic (Allium sativa)-derived self-heteroatom-doped activated carbon (GAC) synthesized via KOH activation at three different temperatures for supercapacitor application. The sample designated as GAC-900 with high specific surface area of 2300 m2/g and high pore volume of 1.126 cm3/g revealed the best results among the three prepared samples, with specific capacitance of 341 F/g at 1 A/g in a three-electrode configuration. It was evident that the GAC-900 material had a sufficient amount of heteroatoms of oxygen, nitrogen, sulfur and a minute quantity of phosphorous which could increase the charge storage performance by imparting pseudocapacitance. The constructed symmetric Swagelok cell GAC-900//GAC-900 device attained remarkable energy density of 33.83 Wh/kg at 600 W/kg, and significant power density of 24,000 W/kg was achieved with energy density of 14.66 Wh/kg. GAC-900//GAC-900 was tested for cyclic stability with 5000 charge–discharge cycles at 5 A/g and exhibited coulombic efficiency of 99.95% with capacitance retention of 95%. Graphical Abstract: [Figure not available: see fulltext.].
UR - http://www.scopus.com/inward/record.url?scp=85146564443&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85146564443&partnerID=8YFLogxK
U2 - 10.1007/s11664-022-10197-6
DO - 10.1007/s11664-022-10197-6
M3 - Article
AN - SCOPUS:85146564443
SN - 0361-5235
VL - 52
SP - 1717
EP - 1729
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
IS - 3
ER -