Cleanly synthesizing rotten potato-based activated carbon for supercapacitor by self-catalytic activation

Wang, Ao; Sun, Kening; Xu, Ruting; Sun, Yunjuan; Jiang, Jianchun

doi:10.1016/j.jclepro.2020.125385

Cited by 92 publications

(32 citation statements)

References 44 publications

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“…Physical activation [ 27 ], chemical activation [ 28 ], catalytic activation [ 29 ], and microwave activation [ 30 ] are commonly used methods for producing biomass-derived AC materials. Among them, chemical activation is extensively utilized to produce porous carbon due to its advantages over other activation methods—such as high yield, less surface damage, low activation temperature, and short reaction time.…”

Section: Introductionmentioning

confidence: 99%

Biomass-Derived Porous Carbon from Agar as an Anode Material for Lithium-Ion Batteries

et al. 2021

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New porous activated carbons with a high surface area as an anode material for lithium-ion batteries (LIBs) were synthesized by a one-step, sustainable, and environmentally friendly method. Four chemical activators—H2SO4, H3PO4, KOH, and ZnCl2—have been investigated as facilitators of the formation of the porous structure of activated carbon (AC) from an agar precursor. The study of the materials by Brunauer–Emmett–Teller (BET) and scanning electron microscopy (SEM) methods revealed its highly porous meso- and macro-structure. Among the used chemical activators, the AC prepared with the addition of KOH demonstrated the best electrochemical performance upon its reaction with lithium metal. The initial discharge capacity reached 931 mAh g−1 and a reversible capacity of 320 mAh g−1 was maintained over 100 cycles at 0.1 C. High rate cycling tests up to 10 C demonstrated stable cycling performance of the AC from agar.

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Section: Introductionmentioning

confidence: 99%

Biomass-Derived Porous Carbon from Agar as an Anode Material for Lithium-Ion Batteries

et al. 2021

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“…Figure 1 a,b shows scanning electron microscopy (SEM) images of the black solid powders. The black solid powders are porous and presented in a muffin‐like shape in contrast to the spherical and layer‐like shapes derived from potato starch [ 16 ] and rotten potato, [ 17 ] respectively. The morphological differences among the potato‐derived activated materials are attributed to the difference in the use of the activation agent.…”

Section: Resultsmentioning

confidence: 99%

A High‐Performance Symmetric Supercapacitor from Porous Activated Carbon under Compression

2021

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The realization of biomass‐derived supercapacitors of high performance is of practical importance for the manufacturing of supercapacitors from green and renewable sources. Herein, the feasibility of constructing high‐performance supercapacitors from potato‐derived activated carbon (AC) is demonstrated. The potato‐derived AC is produced from potato mash through hydrothermal treatment and high‐temperature activation with KOH as agent. The supercapacitors with aqueous electrolyte of 6 m KOH and a mass loading of 5 mg per electrode achieve a specific gravimetric capacitance of 333.7 F g−1 per electrode and a specific energy of 11.75 W h g−1 at a specific power of 197.6 W kg−1 at a current density of 0.4 A g−1 under a nominal compressive stress of 7.96 MPa. The supercapacitors with a mass loading of 10 mg per electrode achieve the maximum specific gravimetric capacitance of 340.6 F g−1 and a specific energy of 11.75 W h g−1 at a specific power of 194.2 W kg−1 at a current density of 0.4 A g−1 under a nominal compressive stress of 7.96 MPa. Increasing the compaction of electrode materials under compressive stress has the potential to increase the electrochemical performance of supercapacitors.

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“…3 (b)) show D-band peaks at approximately 1345 cm -1 and G-band peaks at around 1603 cm -1 , indicating the presence of a carbon lattice defect with a distorted structure (sp3) and some orderlayered graphite with vibration sp2 hybridized carbon atoms, respectively. Moreover, the presence of a 2D-band around 2873 (cm -1 ) is a sign of a local graphene-like structure [16,[59][60][61][62][63]. The integrated intensity ratio of the D and G bands (Id to Ig) can be used to evaluate the surface graphitization, higher of which shows lower graphitization level.…”

Section: (A) [51]mentioning

confidence: 99%

Green Self-Activating Synthesis System for Porous Carbons; Celery Biomass Wastes as a Typical Case for CO2 Uptake with Kinetic, Equilibrium and Thermodynamic Studies

Khowsroshahi

Mashhadimoslem

Emrooz

et al. 2022

Preprint

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A green self-activating synthesis system (SASS) has been introduced for porous carbons. In the presented system, there is no external support for the activation process, and the activating agents are the circulating gases released during the pyrolysis treatment. As a typical case, this system was used for the synthesis of hierarchical porous carbons from celery wastes in hydroponic greenhouses. Based on the adsorption-desorption results, the optimal porous carbons were synthesized at 700°C, providing a surface area as high as 1126 m2g−1 and micropore volume of approximately 0.7 cm3g−1. X-ray photoelectron spectroscopy indicated the presence of graphitic nitrogen in the synthesized porous carbon structure. The synthesized porous carbons were applied as an adsorbent for CO2 capture. CO2 adsorption was performed at low and high pressures at various temperatures. Under low pressures (0-1 bar), the synthesized carbons adsorbed 5 mmolg−1 at 0°C and 2.03 mmolg−1 at 25°C. The adsorption capacity of the synthesized carbon at 25°C and a relatively high pressure of 9.5 bar was 9.57 mmolg−1. Based on the thermodynamic and kinetic models, it was clarified that the adsorption process can be regarded as physisorption with an adsorption enthalpy of 23.2 kJ.mol−1. Additionally, the fractional-order kinetic model was found to be the best match in the kinetic curves. The synthesis system described herein represents a promising strategy for producing green porous carbon from various waste organic precursors.

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Cleanly synthesizing rotten potato-based activated carbon for supercapacitor by self-catalytic activation

Cited by 92 publications

References 44 publications

Biomass-Derived Porous Carbon from Agar as an Anode Material for Lithium-Ion Batteries

Biomass-Derived Porous Carbon from Agar as an Anode Material for Lithium-Ion Batteries

A High‐Performance Symmetric Supercapacitor from Porous Activated Carbon under Compression

Green Self-Activating Synthesis System for Porous Carbons; Celery Biomass Wastes as a Typical Case for CO2 Uptake with Kinetic, Equilibrium and Thermodynamic Studies

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