Electrochemically Exfoliated Layered Carbons as Sustainable Anode Materials for Lead Carbon Hybrid Ultracapacitor

Muduli, Sadananda and Pappu, Samhita and Bulusu, Sarada V. and Rao, Tata N. and Martha, Surendra Kumar (2022) Electrochemically Exfoliated Layered Carbons as Sustainable Anode Materials for Lead Carbon Hybrid Ultracapacitor. ChemElectroChem, 9 (11). ISSN 2196-0216

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Abstract

Lead-carbon hybrid ultracapacitors (Pb−C HUC) have become apparent as a way out of the sulfation issue of lead-acid batteries, simultaneously enhancing the system‘s power density and cycle life. In this work, exfoliated graphene oxides (EGO) were synthesized by the electrochemical exfoliation method followed by chemical activation and carbonization at 600 °C (AEGO-600). The composite electrode delivered 800 F g−1 capacitance at 1 A g−1. The Pb−C HUC fabricated using AEGO-600 anode and PbO2 cathode can achieve capacitance of 325 F g−1 at 10 A g−1 and retain 71 % capacitance after 15000 charge-discharge cycles in the voltage range of 2.3–0.8 V. The highly stable capacitance was due to the formation of layered carbons in AEGO-600 that enhanced the favorable electrolyte ion assessment to maximum active sites. Owing to the facile, cost-effective synthesis approach and better charge storage behavior, the activated-exfoliated graphene oxides thus produced could be suitable candidates for future hybrid ultracapacitor systems. © 2022 Wiley-VCH GmbH.

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IITH Creators:

IITH Creators	ORCiD
Martha, Surendra Kumar	https://orcid.org/0000-0002-7762-7237

Item Type:

Article

Additional Information:

Sadananda Muduli acknowledges the Ministry of Education, India, for fellowship. Financial support for this project work from DST‐IISc Energy Storage Platform on Supercapacitors and Power Dense Devices through the MECSP‐2 K17 program under grant no. DST/TMD/MECSP/2 K17/20 is gratefully acknowledged. We also like to acknowledge the support provided by Dr. Srinivasan Anandan, Dr. Koppoju Suresh, and Dr. Ramkrishna Sahoo from ARCI, Hyderabad, for their help in the characterization of the materials.

Uncontrolled Keywords:

Electrochemical performance; Exfoliated graphene oxides; In-situ Activated PbO2; Lead-Carbon Ultracapacitor; Pseudo capacitance

Subjects:

Chemistry

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

12 Oct 2022 10:57

Last Modified:

12 Oct 2022 10:57