A facile preparation of pomegranate-like porous carbon by carbonization and activation of phenolic resin prepared via hydrothermal synthesis in KOH solution for high performance supercapacitor electrodes

Zang, Jianbing; Tian, Pengfei; Yang, Guoping; Jia, Shaopei; Zhou, Shuyu; Xu, Hanqing; Wang, Yanhui

doi:10.1016/j.apt.2019.08.036

Cited by 38 publications

(16 citation statements)

References 35 publications

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“…The G band is associated with the sp 2 carbon and corresponds to the crystalline graphite. 27 The ratio of the intensity of the D band to the G band ( I D / I G ) can indicate the graphitization degree of carbon. 28 The intensity ratio of the EK-2 sample is the smallest (1.074), confirming that the sample EK-2 has the less amorphous structure and higher graphitization degree.…”

Section: Resultsmentioning

confidence: 99%

Preparation of N/O co-doped porous carbon by a one-step activation method for supercapacitor electrode materials

Liu

Ding

et al. 2022

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Preparation of N/O co-doped porous carbon by a one-step activation method for supercapacitor electrode materials

Liu

Ding

et al. 2022

RSC Adv.

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“…This scheme was also used for presenting the variations in structure (gradually looser) and porosity (increase of pores). The HNO 3 activation process promotes some complex reactions which can increase the polarity, pores and SSA, indicating sufficient ion transmission channels and electrochemical active sites [44,45]. The KOH activation process optimizes the pore structure and increases the SSA of the biomass-derived carbon precursors by removing the non-carbon atoms, etching the surface, and generating vast pores [46][47][48].…”

Section: Resultsmentioning

confidence: 99%

Nanoporous Carbon Derived from Green Material by an Ordered Activation Method and Its High Capacitance for Energy Storage

Zhou

Chen

et al. 2020

Nanomaterials

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Carbon materials have been widely used as electrode materials for supercapacitors, while the current carbon precursors are mainly derived from fossil fuels. Biomass-derived carbon materials have become new and effective materials for electrodes of supercapacitors due to their sustainability, low pollution potential, and abundant reserves. Herein, we present a new biomass carbon material derived from water hyacinth by a novel activation method (combination of KOH and HNO3 activation). According to the electrochemical measurements, the material presents an ultrahigh capacitance of 374 F g−1 (the current density is 1 A g−1). Furthermore, the material demonstrates excellent rate performance (105 F g−1 at a higher density of 20 A g−1) and ideal cycling stability (87.3% capacity retention after 5000 times charge–discharge at 2 A g−1). When used for a symmetrical supercapacitor device, the material also shows a relatively high capacity of 330 F g−1 at 1 A g−1 (a two-electrode system). All measurements suggest the material is an effective and noteworthy material for the electrodes of supercapacitors.

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“…In some studies, it is found that the energy density of hydrochar, the solid product of HTC, is close to peat and lignite, and it could be used as clean fuel for direct combustion [12]. During HTC, biomass underwent hydrolysis, dehydration, decarboxylation, aromatization and recondensation reactions, in which dehydration and decarboxylation can reduce the H/C and O/C ratios of biomass, thus forming high value-added products, such as solid fuel and electrode materials [13][14][15][16]. In addition, it is proved that the HTC process is mainly affected by reaction temperature [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrothermal carbonization temperature on fuel properties and combustion behavior of high-ash corn and rice straw hydrochar

Sui

Wang

et al. 2023

Therm sci

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Hydrothermal carbonization (HTC) has been proven to improve the fuel properties of low-ash straw biomass. To explore the effect of HTC on high-ash straw biomass, the fuel properties and combustion behavior of hydrochar prepared by high-ash rice straw and corn straw at different temperature were studied. The results showed that increased reaction temperature could improve the C content, fixed carbon, heating value and fuel ratios (FC/VM) in high-ash straw hydrochars, which is similar to the change trend of low-ash biomass. The hydrochar prepared at 260?C has similar H/C and O/C atomic ratios and FC/VM to lignite. In addition, the highest energetic recovery efficiency is obtained at 200?C. While at 180?C, the comprehensive combustion characteristic index of the hydrochar is the best, which is 5.04?10-11 (min-2?K-3) and 6.42?10-11 (min-2?K-3). In addition, the C content in the hydrochars at 180?C was lower than the raw material, and the ash content increases with the reaction temperature, which is quite different from the low-ash biomass. In conclusion, the HTC could improve the fuel quality of high-ash straw, while its ash content remains at a high level.

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A facile preparation of pomegranate-like porous carbon by carbonization and activation of phenolic resin prepared via hydrothermal synthesis in KOH solution for high performance supercapacitor electrodes

Cited by 38 publications

References 35 publications

Preparation of N/O co-doped porous carbon by a one-step activation method for supercapacitor electrode materials

Preparation of N/O co-doped porous carbon by a one-step activation method for supercapacitor electrode materials

Nanoporous Carbon Derived from Green Material by an Ordered Activation Method and Its High Capacitance for Energy Storage

Effect of hydrothermal carbonization temperature on fuel properties and combustion behavior of high-ash corn and rice straw hydrochar

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