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Comparative study of low cost, eco-friendly and high performance biowastes-derived porous activated carbons for symmetric supercapacitors

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dc.contributor.author Rabia Fatima
dc.date.accessioned 2022-12-21T06:07:20Z
dc.date.available 2022-12-21T06:07:20Z
dc.date.issued 2022
dc.identifier.uri http://10.250.8.41:8080/xmlui/handle/123456789/31864
dc.description.abstract Porous materials particularly, nano-porous carbons are well known because of having high specific surface area (SSA), different pore dimensions, inherent excellent conductance, low density, and highly available. The most effective source of cheap, plentiful, and environmentally safe precursors for nano-porous carbon, which are then used in energy storage technologies like high-performance symmetric supercapacitors, has been found to be ‘biowaste/biomass’. This study compares two different biowastes-derived porous carbons such as wood and maize cobs using a straightforward one-step pyrolysis and potassium hydroxide (KOH) activation method for use in symmetric supercapacitors. Using XRD, SEM-EDX, FTIR, TGA, and subsequent CV, GCD, EIS, and cycle stability testing, the microstructures, morphology, and comparative study on electrochemical performance of resulting activated carbons were analyzed. The prepared carbon electrode made from maize cobs and wood scraps exhibits an electrical conductivity of 535.75 F.g-1 and 135.64 F.g-1 at 5 A.g-1 in a 6 M KOH electrolyte as a result. The samples also showed a remarkable cycling stability of 99.81 % and 97.67 % at 10 k cycles. In conclusion, the higher electrochemical behavior of carbon material made from maize cobs in comparison to wood scraps can be due to the combination of a high specific surface area with a large number of mesopores/micropores and a highly stable structure en_US
dc.language.iso en en_US
dc.publisher Atta Ur Rahman School of Applied Biosciences (ASAB), NUST en_US
dc.subject nano-porous carbon, SSA, electrical conductivity, eco-friendly, low cost, highly conductive, symmetric supercapacitor, corncob/wood, KOH activation en_US
dc.title Comparative study of low cost, eco-friendly and high performance biowastes-derived porous activated carbons for symmetric supercapacitors en_US
dc.type Thesis en_US


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