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Transformation of Spent Li‐Ion Battery in to High Energy Supercapacitors in Asymmetric Configuration
Author(s) -
Natarajan Subramanian,
Ulaganathan Mani,
Bajaj Hari C.,
Aravindan Vanchiappan
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901448
Subject(s) - supercapacitor , materials science , electrolyte , capacitance , battery (electricity) , power density , electrode , cathode , energy storage , specific energy , chemical engineering , quasi solid , energy density , optoelectronics , nanotechnology , electrical engineering , power (physics) , chemistry , engineering physics , physics , quantum mechanics , dye sensitized solar cell , engineering
Abstract For the first time, herein we report a new track to regenerate the Mn−Co carbonate (MCC) from the mixed composition of cathodes of spent LIBs and successfully evaluated as an electrode material for supercapacitor applications (ASC). The resultant MCC spheres are first tested in a half cell with Pt‐strip as the counter electrode using neutral and alkaline electrolytes. The fabricated ASC with regenerated MCC as the positive electrode and commercial activated carbon (AC) as the negative electrode in the presence of 6 M KOH reveals a specific capacitance of 119 F g −1 at 0.5 A g −1 , also could retain 65 F g −1 at a high current density of 4 A g −1 accompanied by outstanding cycling stability of 9000 cycles with 60 % retention at 1.5 A g −1 . Furthermore, this low‐cost ASC MCC//AC offers a high energy density of 42.2 Wh kg −1 at a power density of 1.6 kW kg −1 , in a stable potential window of 0–1.6 V. In addition, the flexible ASC in solid‐state assembly in series efficiently power a green light‐emitting‐diode, inspiring its promising practical application to build new ASC using spent LIBs materials as sources in “waste‐to‐wealth” approach for high energy asymmetric all‐solid‐state supercapacitors.