Interconnected open-channel carbon nanosheets derived from pineapple leaf fiber as a sustainable active material for supercapacitors

Sodtipinta, Jedsada; Ieosakulrat, Chanoknan; Poonyayant, Natchapol; Kidkhunthod, Pinit; Chanlek, Narong; Amornsakchai, Taweechai; Pakawatpanurut, Pasit

doi:10.1016/j.indcrop.2017.04.015

Cited by 86 publications

(29 citation statements)

References 39 publications

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“…At the specific current lower than 1 A/g, the profile is not in symmetrical triangular shape. But other charge and discharge profiles exhibit approximately symmetrical triangular shapes, which authenticates that they have excellent electrochemical reversibility and double‐layer capacitance characteristics . Yet there is a slight distortion around −0.6 V vs SCE, possibly resulting from the pseudo‐capacitance originating from the sulfur and particularly oxygen groups.…”

Section: Resultsmentioning

confidence: 65%

Potassium sulphate (K₂SO₄) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Peng

Zhang

et al. 2020

Int J Energy Res

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Noncorrosive K 2 SO 4 is found to be able to activate the chestnut shell carbon to oxygen-enriched porous carbons. Chestnut shells are activated by K 2 SO 4 . The structure, texture, chemical state of surface of samples and morphology are analyzed via X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectra, transmission electron microscopy and scanning electron microscopy, respectively. With the optimum amount of K 2 SO 4 (m(K 2 SO 4 )/m(C) = 1.8), higher specific surface area (SSA, 1412 m 2 g −1 ) and total pore volume (0.75 m 2 g −1 ) are obtained. The prepared carbon samples exhibit a hierarchical textural structure making up of micropores, mesopores and macropores. More importantly, a large amount of oxygen defects, as high as 37.7%, and a small amount of sulfur element (0.31%-0.79%) are successfully introduced on the surface of the carbons. The activation mechanism of K 2 SO 4 is also investigated via thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC), which put it down to the high-temperature redox reaction between C and K 2 SO 4 . Owing to the high SSA, the composition of pore, and the abundant surface defects, the activated porous carbons originated from chestnut shell carbon possess highly enhanced capacitive properties. At 0.1 A/g, the specific capacitance reaches 265 F/g, and retains 92% of its starting value after 10 000 cycles at 10 A/g. In general, K 2 SO 4 is a promising noncorrosive alternative to the conventional KOH activator. K E Y W O R D Sactivator, chestnut shell, K 2 SO 4 , oxygen defect, porous carbon, supercapacitor

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Section: Resultsmentioning

confidence: 65%

Potassium sulphate (K₂SO₄) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Peng

Zhang

et al. 2020

Int J Energy Res

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“…The XRD pattern (Figure a) reveals two broad and weak diffractions in the ranges of 23 °–35 ° and 40 °–55 °, which suggests the existence of amorphous carbon in the sample. The first diffraction is ascribed to the turbostratic carbon structure reflected to the (002) plane of graphite, indicating the graphene‐like structure in the sample (Bonino et al, ; Sodtipinta et al, ). The other diffraction reveals the formation of interlayer condensation (Paraknowitsch, Zhang, Su, Thomas, & Antonietti, ).…”

Section: Resultsmentioning

confidence: 99%

“…MRI property comes from the semi‐filled f orbital with seven unpaired electrons in Gd 3+ . The high‐resolution spectrum (Figure b) for the C1 peak can be deconvoluted into three components including aliphatic CC (284.9 eV), hydroxyl carbon CO (286.1 eV), and carbonyl carbon CO (287.9 eV; Mattevi et al, ; Sodtipinta et al, ; Tien, Huang, Yang, Wang, & Ma, ). The O 1s spectrum (Figure c) is deconvoluted into two components corresponding to CO (531.4 eV) and CO (532.6 eV).…”

Section: Resultsmentioning

confidence: 99%

Magnetic resonance imaging and photothermal conversion properties of Gd‐C nanocomposites for interstitial lymphography

et al. 2019

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Dual‐functional agents for magnetic resonance imaging (MRI) guided photothermal therapy (PTT) of lymph cancer are highly desired. Signal enhancement, selectivity between lymphatic nodes/vessels and blood vessels, and photothermal conversion property are the criteria for such dual‐functional agent. In the current work, we demonstrated the potential of Gd‐C nanocomposites as dual‐functional agents for the MRI and PTT of lymph node cancer. Gd‐C nanocomposites were synthesized via a hydrothermal carbonization approach with gadolinium chloride as Gd source and citric acid (CA) as C source. The particle size of the nanocomposites ranges from 40 to 100 nm which is smaller than the intercellular space of lymphatic vessels but much larger than that of the blood vessels. The nanocomposites were successfully applied to the MRI of cervical lymph nodes of rabbits. The signal enhancement of the lymph nodes reached the maximum value of 434% at 10 min after injection, without displaying any blood vessel. The Gd‐C nanocomposites also exhibited strong photothermal conversion effect. Under the illumination of an 808 nm laser, the aqueous suspension containing 1.0 wt % Gd‐C nanocomposites gave a maximum temperature rise of 28.2 °C and a light utilization efficiency of 30.4%. The results indicate that Gd‐C nanocomposites have significant potential in MRI guided PTT of lymph cancer.

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“…The relevant mechanisms for KOH activation of carbon mainly occur in three phases: (i) the carbon skeleton is etched via redox reactions between diverse potassium compounds (KOH, K 2 CO 3 and K 2 O) and carbon, thus generating a large number of micropores; (ii) the gasification of carbon to CO further develops the porosity; and (iii) the generated metallic K can efficiently intercalate into carbon lattices, leading to volumetric expansion of the carbon framework [ 24 ]. The chemical reactions can be expressed as follows [ 25 ]:

In this activation process, the formed K 2 CO 3 starts decomposing to K 2 O and CO 2 at over 700°C and completely disappears at about 800°C [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Digested sludge-derived three-dimensional hierarchical porous carbon for high-performance supercapacitor electrode

Zhang¹,

Fan²,

Dai³

et al. 2018

R. Soc. open sci.

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Digested sludge, as the main by-product of the sewage sludge anaerobic digestion process, still contains considerable organic compounds. In this protocol, we report a facile method for preparing digested sludge-derived self-doped porous carbon material for high-performance supercapacitor electrodes via a sustainable pyrolysis/activation process. The obtained digested sludge-derived carbon material (HPDSC) exhibits versatile O-, N-doped hierarchical porous framework, high specific surface area (2103.6 m2 g−1) and partial graphitization phase, which can facilitate ion transport, provide more storage sites for electrolyte ions and enhance the conductivity of active electrode materials. The HPDSC-based supercapacitor electrodes show favourable energy storage performance, with a specific capacitance of 245 F g−1 at 1.0 A g−1 in 0.5 M Na2SO4; outstanding cycling stability, with 98.4% capacitance retention after 2000 cycles; and good rate performance (211 F g−1 at 11 A g−1). This work provides a unique self-doped three-dimensional hierarchical porous carbon material with a favourable charge storage capacity and at the same time finds a high value-added and environment-friendly strategy for disposal and recycling of digested sludge.

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Interconnected open-channel carbon nanosheets derived from pineapple leaf fiber as a sustainable active material for supercapacitors

Cited by 86 publications

References 39 publications

Potassium sulphate (K₂SO₄) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Potassium sulphate (K₂SO₄) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Magnetic resonance imaging and photothermal conversion properties of Gd‐C nanocomposites for interstitial lymphography

Digested sludge-derived three-dimensional hierarchical porous carbon for high-performance supercapacitor electrode

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Interconnected open-channel carbon nanosheets derived from pineapple leaf fiber as a sustainable active material for supercapacitors

Cited by 86 publications

References 39 publications

Potassium sulphate (K2SO4) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Potassium sulphate (K2SO4) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Magnetic resonance imaging and photothermal conversion properties of Gd‐C nanocomposites for interstitial lymphography

Digested sludge-derived three-dimensional hierarchical porous carbon for high-performance supercapacitor electrode

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Product

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Potassium sulphate (K₂SO₄) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties

Potassium sulphate (K₂SO₄) activation of chestnut shell to oxygen‐enriched porous carbons with enhanced capacitive properties