A Dual Carbon Lithium-Ion Capacitor Using Recycled Polymer Separator Derived Carbon Cathode and Graphite Anode from Spent Lithium-Ion Battery
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Published:2023-09-01
Issue:9
Volume:170
Page:090533
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ISSN:0013-4651
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Container-title:Journal of The Electrochemical Society
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language:
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Short-container-title:J. Electrochem. Soc.
Author:
Bhattacharjee Udita,
Bhar Madhushri,
Ghosh Shuvajit,
Bhowmik Subhajit,
Martha Surendra K.ORCID
Abstract
Lithium-ion capacitors (LICs) are hybrid capacitors that target pushing the energy limits of conventional supercapacitors by incorporating a lithium-ion battery (LIB)-type electrode without compromising much on the power density and cycle life of capacitors. Herein, a LIC is assembled using an ordered porous carbon cathode derived from the recycled polymer separator of spent LIBs and recycled graphite anode from the same source. The carbon-rich polymer is thermally stabilized and carbonized to utilize its porosity for ion storage and ordered matrix for better electronic conduction. The cathode half-cell delivers a capacitance of ∼100 F g−1 till 1000 cycles at 1 A g−1. In contrast, the anode half-cell delivers a capacity of 130 mAh g−1 under similar conditions. The assembled LIC provides an energy density of 129 Wh kg−1 at a power density of 275 W kg−1 and 54 Wh kg−1 at a high-power density of 13750 W kg−1. The LIC cycles with >70% capacitance retention till 6000 cycles. Further, the ion-storage mechanism of the LICs as well as their capacitive and diffusion-type contribution, is studied. The self-discharge and leakage current tests were performed in the cells to understand their practical feasibility.
Funder
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Ministry of Education, India
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials