Bio-Waste Derived Honeycomb Structured Activated Carbons as Anode Materials for Lead-Carbon Hybrid Ultracapacitors

Muduli, Sadananda and Das Chakraborty, Rupan and Verma, Pramod and Martha, Surendra Kumar (2022) Bio-Waste Derived Honeycomb Structured Activated Carbons as Anode Materials for Lead-Carbon Hybrid Ultracapacitors. Journal of The Electrochemical Society, 169 (9). ISSN 0013-4651

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Lead-carbon hybrid ultracapacitors (Pb-C HUC) are the solution to the sulfation issue of lead-acid batteries. The Pb-C HUCs are of much interest due to the aqueous system with longer cycle life and higher power density. Here, honeycomb structured porous activated carbons with 1790 m(2) g(-1) of surface area were synthesized from Carica papaya biowaste by chemical treatment followed by carbonization at 800 degrees C (PAC-800). PAC-800 composite electrode delivers a specific capacitance of 250 F g(-1) at 1 Ag-1 and has 10000 stable cycle life in 4.5 M H2SO4. Further, a kinetic study of the PAC-800 electrode illustrates that at 2 mV s(-1), they show 61% of capacitive and 39% of pseudocapacitive charge storage. Pb-C HUCs fabricated using in situ activated PbO2 sheet as cathode and PAC-800 composite electrode as anode delivers 390 F g(-1) at 1 A g(-1) and have 93% capacitance retention over 15000 cycles at 5 A g(-1). Further, the current Pb-C HUC results are compared with commercially available high surface area (2484 m(2) g(-1)) carbons based Pb-C HUCs. This work illustrates an easy, scalable synthesis root for biowaste carbons and their electrochemical performance in Pb-C HUCs, which is on par with commercial high surface area carbons. (C) 2022 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.

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IITH Creators:
IITH CreatorsORCiD
Martha, Surendra Kumar
Item Type: Article
Additional Information: Sadananda Muduli acknowledges the Ministry of Education, Govt. of India for fellowship. Rupan Das Chakraborty acknowledges DST-Inspire grant IF190421, Govt. of India for the fellowship. We thank DST-IISc Energy Storage Platform on Supercapacitors and Power Dense Devices through the MECSP-2K17 program under grant no. DST/TMD/MECSP/2K17/20 for Financial support to this project work. We acknowledge Dr. P. Vijayakumar and Ms. Adyasa Priyadarsini, of the Department of Chemistry, Indian Institute of Technology, Hyderabad, India, for their help in XPS characterization and raw bio-waste material collection.
Uncontrolled Keywords: NITROGEN,BAMBOO,LEAVES
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 23 Sep 2022 06:16
Last Modified: 23 Sep 2022 06:16
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