Nanoporous hierarchical carbon structures derived from fungal <i>basidiocarps</i> for high performance supercapacitors

Gannavarapu, Krishna Prasad; Azizighannad, Samar; Molli, Muralikrishna; Pandey, Meera; Muthukumar, Sai; Mitra, Somenath

doi:10.1002/est2.58

Cited by 8 publications

(2 citation statements)

References 27 publications

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“…The surface areas from other sources, such as Auricularia sp. (80 m 2 g −1 [9] and 1103 m 2 g −1 ) [2], seaweed (746 m 2 g −1 ) [35], Lessonia nigrescens (746 m 2 g −1 ) [36], Ganoderma lacidum (430 m 2 g −1 ) [37], and Calocybe indica (958 m 2 g −1 ) [37] were close to-and in some cases, lower than-the surface areas of most active carbons (>1000 m 2 g −1 ). It was previously anticipated that such an enlargement might further enhance electrochemical capacitance [9].…”

Section: Analysis Of the Porous Structurementioning

confidence: 99%

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

et al. 2021

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Currently, there is increasing interest and effort directed to developing sustainable processes, including in waste management and energy production and storage, among others. In this research, corn cobs were used as a substrate for the cultivation of Pleurotus djamor, a suitable feedstock for the management of these agricultural residues. Revalorization of this fungus, as an environmentally friendly carbon precursor, was executed by taking advantage of the intrinsic characteristics of the fungus, such as its porosity. Obtaining fungus-derived porous carbons was achieved by hydrothermal activation with KOH and subsequent pyrolysis at 600, 800, and 1000 °C in an argon atmosphere. The morphologies of the fungal biomass and fungus-derived carbons both exhibited, on their surfaces, certain amorphous similarities in their pores, indicating that the porous base matrix of the fungus was maintained despite carbonization. From all fungus-derived carbons, PD1000 exhibited the largest superficial area, with 612 m2g−1 and a pore size between 3 and 4 nm recorded. Electrochemical performance was evaluated in a three-electrode cell, and capacitance was calculated by cyclic voltammetry; a capacitance of 60 F g−1 for PD1000 was recorded. Other results suggested that PD1000 had a fast ion-diffusion transfer rate and high electronic conductivity. Ultimately, Pleurotus djamor biomass is a suitable feedstock for obtaining carbon in a sustainable way, and it features a defined intrinsic structure for potential energy storage applications, such as electrodes in supercapacitors.

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Section: Analysis Of the Porous Structurementioning

confidence: 99%

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

et al. 2021

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“…The specific capacitances of the electrodes increased considerably after plasma modification, yielding 342.5 and 332.1 F/g for lilac and lotus at 0.5 A/g in 6 M KOH electrolyte. Gannavarapu et al 5 prepared two different electrodes using two different mushroom species, Ganoderma lucidum (GL) and Calocybe indica . Electrode materials were obtained by microwave‐induced H3PO4 activation followed by carbonization and KOH activation.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of Quercus infectoria as a supercapacitor carbon electrode material

Akdemir

2022

Intl J of Energy Research

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Summary In order to eliminate disadvantages of conventional capacitors and batteries, supercapacitors have become very popular lately. Carbon‐based biomass materials show great promise as supercapacitor electrode materials due to their high stability, good electronic conductivity, and porous structure. In this study, Quercus infectoria (Qui) biomass was converted to activated carbon for the first time using carbonization and different acid–base activations. Three supercapacitor cells with two‐electrode system were designed using these activated carbons. As a result of activation with KOH, the capacitance values increased 3‐fold for 1 A/g, and a high capacitance value of 89 F/g was obtained, thanks to the increasing of pore volume and the expansion of the surface area. After 110 cycles, the Qui‐KOH electrode still maintained 92.1% of its capacitance value. Qui‐KOH had a maximum energy density of 8.46 Wh/kg at a power density of 407.64 W/kg, much higher than the energy density of other electrodes. An increase in coulombic efficiency was observed after 110 cycles of all electrodes, and for the Qui‐KOH, it rised to 92.77%. The developed electrodes offer new potential in the field of energy storage since they are inexpensive, ecologically friendly, efficient, high‐capacity, and stable.

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Electrode and symmetric supercapacitor device performance of boron‐incorporated reduced graphene oxide synthesized by electrochemical exfoliation

Muthu

Tatiparti

2020

Energy Storage

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Boron‐incorporated reduced graphene oxide (B‐rGO) is synthesized via novel single‐step potentiostatic exfoliation at 3 V vs Ag/AgCl employing (NH4)2SO4 + B(OH)3 electrolyte for supercapacitor applications. Structural characterization is performed by XRD, Raman, XPS, VB, SEM, TEM, and BET analysis. Eventually, B‐rGO synthesis scheme is proposed. The electron‐deficient B causes p‐doping in B‐rGO forming BCO2, BC2O, and BC3 (XPS), redshift of 2D band (Raman) and blue shifts in C 2p‐π peaks and Ef in VB. B‐rGO exhibits specific capacitances (Csp) of 446 F g−1 at 0.1 A g−1 and 284 F g−1 at 20 A g−1 in 6 M KOH. Upon 2000 charge/discharge cycles at 5 A g−1, 95.6% capacitance is retained. B‐rGO gives energy and power densities of 25.2 W h kg−1 and 8064 W kg−1 at 20 A g−1. The remarkably high energy density of B‐rGO is attributed to p‐doping effect. B‐rGO exhibits superior performance, compared with rGO synthesized from (NH4)2SO4. A symmetric B‐rGO supercapacitor device is fabricated and exhibits Csp of 120 F g−1 at 0.1 A g−1. At 20 A g−1 the energy and power densities are 6.45 W h kg−1 and 8000 W kg−1, respectively. The device retains 89.8% capacitance upon 2000 charge/discharge cycles.

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Nanoporous hierarchical carbon structures derived from fungal basidiocarps for high performance supercapacitors

Cited by 8 publications

References 27 publications

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

Electrochemical performance of Quercus infectoria as a supercapacitor carbon electrode material

Electrode and symmetric supercapacitor device performance of boron‐incorporated reduced graphene oxide synthesized by electrochemical exfoliation

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