Preparation of nanoporous carbon microspheres by subcritical water carbonization and electrocapacitive study

Kurniawan, Ade; Effendi, Chintya; Ong, Lu Ki; Kurniawan, Fredi; Lin, Chun Xiang; Angkawijaya, Artik Elisa; Ju, Yi‐Hsu; Ismadji, Suryadi; Xin, Zhao

doi:10.1016/j.electacta.2013.07.223

Cited by 14 publications

(10 citation statements)

References 48 publications

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“…By increasing both of those operation parameters, the heat available for a break down the hydrogen bond of water and the availability of H 3 O + and OH À ions also increased. The presence of excess H 3 O + and OH À ion concentrations in the solution accelerate the dehydration process of sugars in the solution [1] leading to increase the yield of carbon microsphere.…”

Section: Resultsmentioning

confidence: 99%

“…During the activation of carbon microsphere using KOH and assisted by microwave irradiation, the evolution and opening new pores within the carbon particles occurred due to the removal of volatiles, impregnated KOH and its derived compounds, such as K 2 O and K 2 CO 3 from the carbon walls. These volatiles are generated from complex reactions occurred during the impregnation and activation processes, these reactions include decomposition, dehydration, and condensation of macromolecules [1].…”

Section: Pore Structure Of Activated Carbonmentioning

confidence: 99%

“…Electrocapacitive stability of the carbon electrode (impregnation ratio 1:1) was measured by galvanostatic charge and discharge. This technique is widely employed for evaluating the normalized capacitance and internal resistance of an electrochemical device [1]. Fig.…”

Section: Electrocapacitive Properties Of Activated Carbon Microspherementioning

confidence: 99%

“…Activated carbon has been widely in used as the electrode for supercapacitors due to its high surface area, excellent mechanical as well as chemical properties, tunable pore structure, and the most beneficial for industrial application are low cost and ready availability [1]. Different studies on the use of different kinds of carbons as the electrode of supercapacitors have been conducted in order to explore the electrochemical performance of the materials [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Carbon microsphere from water hyacinth for supercapacitor electrode

Kurniawan

Wongso

Ayucitra

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

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Section: Resultsmentioning

confidence: 99%

Section: Pore Structure Of Activated Carbonmentioning

confidence: 99%

Section: Electrocapacitive Properties Of Activated Carbon Microspherementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Carbon microsphere from water hyacinth for supercapacitor electrode

Kurniawan

Wongso

Ayucitra

et al. 2015

Journal of the Taiwan Institute of Chemical Engineers

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“…At this mild temperature, water is considered as a reacting dehydrating agent. We note that the catalyst-free carbonization under such subcritical water conditions is more environmentally friendly than most of the other production methods for nanocarbon materials [107].…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

Frese

Mitchell

Bowers

et al. 2017

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Unusual structure of low-density carbon nanofoam, different from the commonly observed micropearl morphology, was obtained by hydrothermal carbonization (HTC) of a sucrose solution where a specific small amount of naphthalene had been added. Helium-ion microscopy (HIM) was used to obtain images of the foam yielding micron-sized, but non-spherical particles as structural units with a smooth foam surface. Raman spectroscopy shows a predominant sp 2 peak, which results from the graphitic internal structure. A strong sp 3 peak is seen in X-ray photoelectron spectroscopy (XPS). Electrons in XPS are emitted from the near surface region which implies that the graphitic microparticles have a diamond-like foam surface layer. The occurrence of separated sp 2 and sp 3 regions is uncommon for carbon nanofoams and reveals an interesting bulk-surface structure of the compositional units.

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Carbon‐Based Composite Phase Change Materials for Thermal Energy Storage, Transfer, and Conversion

et al. 2021

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Phase change materials (PCMs) can alleviate concerns over energy to some extent by reversibly storing a tremendous amount of renewable and sustainable thermal energy. However, the low thermal conductivity, low electrical conductivity, and weak photoabsorption of pure PCMs hinder their wider applicability and development. To overcome these deficiencies and improve the utilization efficiency of thermal energy, versatile carbon materials have been increasingly considered as supporting materials to construct shape‐stabilized composite PCMs. Despite some carbon‐based composite PCMs reviews regarding thermal conductivity enhancement, a comprehensive review of carbon‐based composite PCMs does not exist. Herein, a systematic overview of recent carbon‐based composite PCMs for thermal storage, transfer, conversion (solar‐to‐thermal, electro‐to‐thermal and magnetic‐to‐thermal), and advanced multifunctional applications, including novel metal organic framework (MOF)‐derived carbon materials are provided. The current challenges and future opportunities are also highlighted. The authors hope this review can provide in‐depth insights and serve as a useful guide for the targeted design of high‐performance carbon‐based composite PCMs.

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Preparation of nanoporous carbon microspheres by subcritical water carbonization and electrocapacitive study

Cited by 14 publications

References 48 publications

Carbon microsphere from water hyacinth for supercapacitor electrode

Carbon microsphere from water hyacinth for supercapacitor electrode

Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution

Carbon‐Based Composite Phase Change Materials for Thermal Energy Storage, Transfer, and Conversion

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