A green technology for the preparation of high capacitance rice husk-based activated carbon

Liu, Dechen; Zhang, Wenli; Lin, Haibo; Li, Yang; Lu, Haiyan; Wang, Yan

doi:10.1016/j.jclepro.2015.07.005

Cited by 167 publications

(54 citation statements)

References 53 publications

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“…Most commercially available porous carbons are produced from coconut shells by physical activation using steam as an activation agent, which yields porous carbons with high purity and SSA of ≈1500 m 2 g −1 . Chemical activation strategy is usually applied to produce porous carbons with high SSAs ranging from 1000 to 3000 m 2 g −1 using KOH or NaOH as the activation agents 11–13. The production of chemically activated porous carbons is limited to lab‐scale due to their high production cost owing to the high activation agent/char ratios (normally ranging from 1 to 5, sometimes up to 10),14,15 and the high cost of activation agent (especially KOH).…”

Section: Introductionmentioning

confidence: 99%

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

et al. 2020

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Supercapacitors (SCs) have experienced a significant increase in research activity and commercialization during the past few decades. As the primary and most important electrode active material for commercial SCs, porous carbon is produced at an industrial‐scale through traditional carbonization‐activation strategies. Nevertheless, commercial porous carbon materials have some disadvantages such as high production cost, corrosion of equipment, and emission of toxic gases and byproduct pollutants during production. In recent years, huge efforts have been made to develop novel synthesis strategies for porous carbon materials. This review focuses on the pore formation mechanisms in traditional carbonization‐activation methods, emerging activation methods, template methods, self‐template methods, and novel emerging methods for the synthesis of porous carbons for SCs. Strategies developed so far for the synthesis of porous carbon materials are summarized. The mechanisms and recent advances for each strategy are reviewed. Furthermore, future directions and synthesis strategies for porous carbons are proposed.

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Section: Introductionmentioning

confidence: 99%

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

et al. 2020

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“…Moreover, many articles indicate that the doping of metal oxide could improve significantly the electrochemical performance of the porous carbon [10][11][12]. On our future research, these experiments will be performed to raise the probability of the rice husk application.…”

Section: Discussionmentioning

confidence: 95%

“…4. At scan rate of 5 mV.s -1 , all the porous carbon samples show a symmetric and quasi-rectangular sharp profile typical of electrode materials [10]. With the escalation of scan rate, the CVs which still remain rectangular sharped even at a scan rate up to 100 mV.s -1 indicated a good capacitor behavior of the material at a high scan rate.…”

Section: Electrochemical Feature Of Porous Carbonsmentioning

confidence: 86%

Preparation and Characterization of Porous Carbon From Rice Husk Applied for Electrode Materials

Huyền¹

2018

JST

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Rice husk (RH) was used as the precursor for porous carbon preparation applying as electrode materials. Porous carbon was synthesized by pyrolysis of RH under inert gas atmosphere followed by hydrothermal treatment in NaOH to remove the silica fraction and K 2 CO 3 activation to increase porosity of archived carbon. The temperature of RH decomposition was determined by the thermal gravimetric analysis (TGA) method in the nitrogen atmosphere. The performance of porous carbon and C-SiO x were examined using Brunauer-Emmett-Teller (BET) measurement and Scanning electron microscopy (SEM). The electrochemical characterizations of the synthesized materials were analyzed using cyclic voltammetry (CV) and chronopotentiometry techniques. The effect of parameters of hydrothermal and activation steps on the capacity of these porous carbons were researched. The activated porous carbon which obtained by K 2 CO 3 activation at 900 0 C in 2 hours has high specific surface area (S BET = 769.3 m 2 /g). Specific capacitance of the as-prepare electrode is 116.2 F.g -1 at scan rate of 5 mV/s. Therefore, as-prepared porous carbon from RH would be proper candidate for application as electrode material.

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“…The common method of preparation RHPC is chemical activation. Activation process includes two stages: carbonization at high temperatures and activation process using different chemical agents (such as KOH, H 3 PO 4 , and ZnCl 2 ). Although porous carbon owns good capacitance performance by KOH activation, it is limited by expensive production costs and serious corrosion of reactors and equipments, which hinders the large‐scale industrial production.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Porous Carbon Prepared through Sustainable CuCl₂ Activation of Rice Husk for High‐Performance Supercapacitors

et al. 2019

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Porous carbon material has been widely used as the electrode material for supercapacitor owing to distinctive advantages of high electrical conductivity, low cost and availability at ease. In this study, rice‐husk‐derived porous carbon (RHPC) is successfully prepared by employing a new activation agent copper chloride (CuCl2). The morphology and porous structure of RHPC are characterized by scanning electron microscope and N2 adsorption/desorption. The electrochemical performances of RHPC are investigated by alvanostatic charge‐discharge, cyclic voltammetry and electrochemical impedance spectroscopy. The RHPC possesses high porosity and large specific surface area. When used as supercapacitor electrode materials, RHPC exhibits high specific capacitance of 165.23 F⋅g−1 at a current density of 0.5 A⋅g−1, excellent cycle stability and noticeable high‐rate capacity of 151.69 F⋅g−1 even at a high current density of 20 A⋅g−1. More importantly, the preparation of this CuCl2 activator is facile and low‐cost. Besides, the recyclability meet the requirements of environmental concerns.

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A green technology for the preparation of high capacitance rice husk-based activated carbon

Cited by 167 publications

References 53 publications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Preparation and Characterization of Porous Carbon From Rice Husk Applied for Electrode Materials

Hierarchical Porous Carbon Prepared through Sustainable CuCl₂ Activation of Rice Husk for High‐Performance Supercapacitors

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A green technology for the preparation of high capacitance rice husk-based activated carbon

Cited by 167 publications

References 53 publications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Preparation and Characterization of Porous Carbon From Rice Husk Applied for Electrode Materials

Hierarchical Porous Carbon Prepared through Sustainable CuCl2 Activation of Rice Husk for High‐Performance Supercapacitors

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Hierarchical Porous Carbon Prepared through Sustainable CuCl₂ Activation of Rice Husk for High‐Performance Supercapacitors