Meso- and micro- porous composite carbons derived from humic acid for supercapacitors

Yin, Jiao; Zhang, Duanyi; Zhao, Jiquan; Wang, Xiaolei; Zhu, Hui; Wang, Chuanyi

doi:10.1016/j.electacta.2014.05.115

Cited by 95 publications

(55 citation statements)

References 64 publications

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“…From those results, it implies that the APEs have abundant micropores with a narrow pore size distribution [30]. At the relative pressures from 0.4 to 1.0, the subtle hysteresis loops provide evidence for forming a small amount of mesopores in the samples [31].…”

Section: Resultsmentioning

confidence: 71%

Porous Activated Carbons Derived from Pleurotus eryngii for Supercapacitor Applications

Yuan

Sun

et al. 2018

Journal of Nanomaterials

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Varieties of natural biomass have been utilized to prepare porous carbon materials for supercapacitor applications. In this work, porous activated carbons derived from Pleurotus eryngii were prepared by carbonization and KOH activation. The activated carbons presented a large specific surface area of 3255 m 2 ·g −1 with high porosity. The as-prepared electrode exhibited a maximal specific capacitance of 236 F·g −1 measured in a three-electrode cell system. Furthermore, the assembled symmetric supercapacitor showed a specific capacitance of 195 F·g −1 at 0.2 A·g −1 and a superior specific capacitance retention of about 93% after 15000 cycles. The desirable capacitive behavior suggests that Pleurotus eryngii is an attractive biomass source of carbon materials for the potential supercapacitor applications.

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Section: Resultsmentioning

confidence: 71%

Porous Activated Carbons Derived from Pleurotus eryngii for Supercapacitor Applications

Yuan

Sun

et al. 2018

Journal of Nanomaterials

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“…9,10 Most of the porous carbon consists of narrow micropores (<1 nm) which can exhibit a large BET surface area. However, these granular powders of porous carbon can result in large diffusion paths of ions.…”

Section: -5mentioning

confidence: 99%

Hierarchical S-doped porous carbon derived from by-product lignin for high-performance supercapacitors

Tian

Liu

et al. 2017

RSC Adv.

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For the first time, hierarchical S-doped porous carbon was fabricated using sodium lignosulfonate as a carbon and sulfur precursor through a simple template technique. , excellent rate performance with 73% capacitance retention after a current density increasing from 0.5 to 20 A g À1 and cycling stability, with 97% capacitance retention after 10 000 cycles.Additionally, a symmetric supercapacitor based on S-PC-L-900 delivers a high energy density (6.9 W h kg À1) at 50 W kg À1.

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“…Furthermore, the high resolution C1s spectrum of HPAC (Fig. 4b) reveal that oxygen-containing functional groups existing on the surface are in the forms of C-O, C=O and O-C=O [28,29], which have also been found on the ACs derived from humic acids and resorcinol-formaldehyde resin [28,30]. The existence of oxygen-containing functional groups can improve the wettability between the aqueous electrolyte solution and the AC surface.…”

Section: Resultsmentioning

confidence: 96%

“…2b, c) almost disappears in HPAC and Maxsorb by comparison with lignite. The results reveal that highly amorphous structure in HPAC, which is due to the inner eroding process of KOH activation under microwave heating that leads to form well-developed porosity with high surface area [28]. From the SEM micrographs ( Fig.…”

Section: Resultsmentioning

confidence: 97%

“…However, the HPAC gives a high specific capacitance of 390 F/g at a low current density of 50 mA/g and shows 317 F/g even at a high current density of 5 A/g, whereas the specific capacitance of Maxsorb decreases from 321 to 240 F/g under the same condition. It is noted that the specific capacitance of the HPAC is much higher than that of hierarchical porous carbon derived from humic acids (290 F/g) [28], phenolic resin (256 F/g) [33] and banana peel (158 F/g) [34] reported recently, and is comparable to that of AC prepared from lignite via a conventional method but using longer heating time [24]. The high specific capacitance of the HPAC is mainly attributed to its high micropore volume and oxygen-enriched surface which enhance charge accumulation.…”

Section: Resultsmentioning

confidence: 98%

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Microwave synthesis of hierarchically porous activated carbon from lignite for high performance supercapacitors

et al. 2015

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A hierarchically porous activated carbon (HPAC) with high surface area (3064 m 2 /g) and large pore volume (2.319 cm 3 /g) was prepared from lignite using KOH as activation agent by microwave heating. Nitrogen adsorption-desorption at -196°C, X-ray diffraction, scanning electron microscope, transmission electron microscope and X-ray photoelectron spectroscopy were used to characterize the HPAC. Because of its high surface area, macro-meso-micro hierarchically porous structure and oxygen-enriched surface, the HPAC exhibits excellent electrochemical performance in terms of specific capacitance, energy density and cycling stability as electrode material for supercapacitors. The HPAC showed a high specific capacitance of 390 F/g in aqueous electrolyte at a current density of 50 mA/g and 94.1 % of the initial specific capacitance was retained after 2000 cycles. Furthermore, this HPAC displayed a high specific capacitance of 198 F/g in an organic electrolyte.

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Meso- and micro- porous composite carbons derived from humic acid for supercapacitors

Cited by 95 publications

References 64 publications

Porous Activated Carbons Derived from Pleurotus eryngii for Supercapacitor Applications

Porous Activated Carbons Derived from Pleurotus eryngii for Supercapacitor Applications

Hierarchical S-doped porous carbon derived from by-product lignin for high-performance supercapacitors

Microwave synthesis of hierarchically porous activated carbon from lignite for high performance supercapacitors

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