Effect of varying carbon microstructures on the ion storage behavior of dual carbon lithium-ion capacitor

Martha, Surendra K. (2023) Effect of varying carbon microstructures on the ion storage behavior of dual carbon lithium-ion capacitor. Electrochimica Acta, 454. p. 142353. ISSN 0013-4686

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Dual carbon lithium-ion capacitors (LICs) are the next-generation hybrid energy storage devices that aim towards energy-power balanced applications. Thus, tuning the properties of the carbon electrode materials is a crucial step toward optimizing the device's performance. Herein, the effect of change in the microstructure of the carbon electrodes on the ion storage capacity and their consequent energy-power manifestation is investigated. The optimized carbonaceous anode calcined at 700 ⁰C delivers 290 mAh g−1 capacity after 1000 cycles at 1 A g−1. This superiority in performance is attributed to the formation of micron-size channels and mesopores for better ion transport and storage. In contrast, the activated carbon cathode delivers a capacitance of 118 F g−1 and retains 76% at the end of 5000 cycles. The LIC full cell with these electrode materials provides maximum energy of 120 Wh kg−1, a maximum power density of 20.7 kW kg−1 and cycles till 9000 cycles with ∼67% capacitance retention. The mechanistic control over the deliverable ion storage capacity is also analyzed for the LIC full cell. Furthermore, the lighting demonstration, self-discharge studies, leakage current, and electrochemical impedance are recorded to elucidate the practical feasibility and performance degradation mechanism of the coin-cell device.

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IITH Creators:
IITH CreatorsORCiD
Martha, Surendra K.https://orcid.org/0000-0002-7762-7237
Item Type: Article
Uncontrolled Keywords: Carbon microstructure; Dual carbon lithium-ion capacitor; Electrochemistry; Ion-storage mechanism; Activated carbon; Anodes; Capacitance; Cathodes; Degradation; Electric discharges; Electrochemical electrodes; Lithium; Lithium-ion batteries; Microstructure; Storage (materials); Supercapacitor; Carbon electrode; Carbon microstructures; Dual carbon lithium-ion capacitor; Electrode material; Energies (power); Ion storage; Ion-storage mechanism; Lithium-ion capacitors; Storage capacity; Storage mechanism; Ions
Subjects: Chemical Engineering
Chemical Engineering > Organic products
Divisions: Department of Chemical Engineering
Depositing User: Mr Nigam Prasad Bisoyi
Date Deposited: 12 Nov 2023 10:41
Last Modified: 12 Nov 2023 10:41
URI: http://raiith.iith.ac.in/id/eprint/11744
Publisher URL: https://doi.org/10.1016/j.electacta.2023.142353
OA policy: https://v2.sherpa.ac.uk/id/publication/4625
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