The Preparation and Capacitance Performance of the K<sub>2</sub>FeO<sub>4</sub>-activated Biomass Porous Carbon

CHEN Meiqiong; GUO Wenxian; CHEN Mengmeng; ZHANG Min; CHENG Faliang

doi:10.6054/j.jscnun.2021055

Journal of South China Normal University (Natural Science Edition) > 2021 > 53(4): 31-39. > DOI: 10.6054/j.jscnun.2021055

CHEN Meiqiong, GUO Wenxian, CHEN Mengmeng, ZHANG Min, CHENG Faliang. The Preparation and Capacitance Performance of the K₂FeO₄-activated Biomass Porous Carbon[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(4): 31-39. DOI: 10.6054/j.jscnun.2021055

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The Preparation and Capacitance Performance of the K₂FeO₄-activated Biomass Porous Carbon

1.
Dongguan Key Laboratory of Green Energy//City College of Dongguan University of Technology, Dongguan 523419, China
2.
Guangdong Engineering and Technology Research Center for Advanced Nanomaterials//School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China

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Received Date: June 01, 2021
Available Online: September 02, 2021

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Abstract

Abstract

Graphitic shaddock peel porous carbon (GSPC) was prepared via acombination of K₂FeO₄ soaking treatments and calcination. The morphology and composition of GSPC were studied with the scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy (Raman), and its capacitance performance was studied with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and the galvanostatic charge-discharge experiment (GCD). The results showed that after the graphitization the BET surface area of porous carbon increased from 75.91 m²/g to 619.78 m²/g, and the pore volume increased from 0.192 cm³/g to 0.425 cm³/g. The GSPC electrode demonstrated a much higher specific capacitance of 245 F/cm² at a current density of 1 A/g and excellent rate capability with the capacitance retention of 74% at the current density of 7 A/g. Moreover, the GSPC electrode also exhibited excellent cycle stability with no capacitance attenuation after 10 000 cycles. This work provides a new path for the explorer of low-cost and high-performance biomass porous carbon.
- potassium ferrate,
- graphitization,
- biomass,
- porous carbon

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