Direct carbonization of rice husk to prepare porous carbon for supercapacitor applications

Zhang, Wenli; Lin, Nan; Liu, Debo; Xu, Jinhui; Sha, Jinxin; Yin, Jian; Tan, Xuanping; Yang, Haoqi; Lu, Haiyan; Lin, Haibo

doi:10.1016/j.energy.2017.04.065

Cited by 164 publications

(58 citation statements)

References 44 publications

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“…The electrochemical properties of the corncob‐derived activated carbons were evaluated in half cell by CV, GCD and EIS measurements (Figure ). All samples at a scan rate of 20 mV s −1 show quasi‐rectangular CV curves with little bumps at 2.0‐4.5 V (Figure a), indicating the capacitance mainly results from double‐layer capacitance . The C‐ACs‐8 shows the maximum current response among all the corncob‐derived activated carbons, suggesting it has the highest capacitance.…”

Section: Resultsmentioning

confidence: 97%

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Sun

Yang

et al. 2019

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Lithium‐ion capacitor (LIC) is an advanced energy storage system due to the combination of high energy density and rapid charge–discharge capability. However, one of the challenges is to improve the specific capacitance and energy density of cathode at high power density. For activated carbon based cathode, the unique hierarchical porous structure and suitable graphitization are crucial for the improvement of the specific capacitance and energy density. Herein, a novel heating‐rate‐induced method is developed to prepare corncob‐derived activated carbons (C‐ACs) with high electrochemical performances. The as‐obtained C‐ACs possess large surface area (1154 m2 g−1), optimal hierarchical porous structure, and suitable graphitization. Particularly, optimal hierarchical porous structure contains not only the high energy storage of the micropores but also the high‐rate performance of the mesopores and macropores. The optimized C‐ACs‐8 electrode exhibits a specific capacitance of 158 F g−1 at 0.5 A g−1, exciting rate performance, and fast charge transfer capability. A lithium‐ion capacitor device based on C‐ACs‐8 cathode delivers a high energy density of 75 Wh kg−1 at power density of 562 W kg−1 and shows a long cycle life with 86.4% capacitance retention after 1000 cycles.

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Section: Resultsmentioning

confidence: 97%

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Sun

Yang

et al. 2019

ChemistrySelect

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“…At a current density of 0.5 A g −1 , the specific capacitances of SCPC‐2.0, SCPC‐2.5, SCPC‐3.0, and SCPC‐3.5 electrodes are 270.77, 312.57, 285.36, and 283.22 F g −1 , respectively, as shown in Figure d. At a current density of 0.5 A g −1 , the specific capacitance of the YP‐50F electrode is 141.64 F g −1 , which is less than half the capacitance of the SCPC‐2.5 electrode. The specific capacitance of the SCPC‐2.5 electrode is also higher than those of some reported porous carbon electrodes such as nitrogen‐enriched hybrid carbon nanosheets, porous active carbon layer modified graphene, and porous carbon derived from rice husk . The specific capacitance of the SCPC‐2.5 electrode is as high as 281.32 F g −1 even at 15 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Self‐Templating Synthesis of 3D Hollow Tubular Porous Carbon Derived from Straw Cellulose Waste with Excellent Performance for Supercapacitors

et al. 2019

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A three‐dimensional hollow tubular porous carbon (SCPC) was prepared from straw cellulose waste through a self‐templating method combined with NaOH activation. Straw cellulose acts both as carbon source and structural template. The obtained SCPC exhibits a 3D hierarchical porous network structure. SCPC has a high specific surface area, a high mesoporosity ratio, and a low resistivity, which make it display excellent electrochemical performance for supercapacitors. SCPC showed a high specific capacitance of 312.57 F g−1 in 6 m KOH at 0.5 A g−1, an excellent rate performance of 281.32 F g−1 even at 15 A g−1, and an outstanding cyclic stability of 92.93 % capacitance retention after 20 000 cycles at 1 A g−1. SCPC‐based supercapacitors can deliver an energy density of 8.67 Wh kg−1 at a power density of 3.50 kW kg−1 in 6 m KOH and an energy density of 28.56 Wh kg−1 at a power density of 14.09 kW kg−1 in 1 m Et4NBF4/PC, which demonstrates the possibility of applying SCPC in supercapacitors. This research not only offers a facile and sustainable method for the preparation of hierarchical porous carbon for electrochemical energy storage devices but also provides a highly efficient method for the utilization of biomass waste.

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“…After coating, the polyaniline‐coated BC nanofibers exhibited a high specific capacitance of 238.4 F g −1 at 0.5 A g −1 . Zhang et al prepared a rice husk‐derived carbon (RHC) through direct pyrolysis of rice husk in a sealed tube furnace without the injection of N 2 193. RHC showed an SSA of 337 m 2 g −1 , a pore size centered at 0.7 and 3.6 nm, and a pore volume of 0.207 cm 3 g −1 .…”

Section: Self‐template Methodsmentioning

confidence: 99%

“…These studies indicated that all carbohydrates can essentially be used as precursors to synthesize porous carbon by this self‐activation strategy. Self‐activation even can be applied in the activation of other carbon‐rich biomasses 193,221,222. Defect mesopore‐dominant porous carbon (termed as HDMPC) with SSA of 2192 m 2 g −1 was prepared through direct pyrolysis of low‐cost sheep bone in an argon atmosphere through self‐activation strategy.…”

Section: New Porogen Engineering Methodsmentioning

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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Direct carbonization of rice husk to prepare porous carbon for supercapacitor applications

Cited by 164 publications

References 44 publications

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Self‐Templating Synthesis of 3D Hollow Tubular Porous Carbon Derived from Straw Cellulose Waste with Excellent Performance for Supercapacitors

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

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