Pyrolytic cyanobacteria derived activated carbon as high performance electrode in symmetric supercapacitor

Wang, Keliang; Cao, Yuqing; Wang, Xiaomin; Fan, Qihua; Gibbons, William R.; Johnson, Tylor J.; Luo, Bing; Gu, Zhengrong

doi:10.1016/j.energy.2015.10.047

Cited by 30 publications

(13 citation statements)

References 32 publications

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“…They exhibited four peaks at around 284.6, 285.2, 286.2, and 288.4 eV, attributed to C=C, C−N, C=N/C=O, and O‐C=O functional groups, respectively [32,43] (Figure S4a). The high‐resolution O1s spectra in Figure S4b, c, d can be deconvoluted into three peaks at around 531.8, 532.5, and 533.3 eV, assigned to C=O, C−O, and C−OH groups, respectively ,. As it can be seen from Table , O and N content decreased with increasing of activation temperature.…”

Section: Resultsmentioning

confidence: 98%

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High Performance N‐Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications

et al. 2018

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The conversion of bio‐waste into useful porous carbons constitutes a very attractive approach to contribute to the development of sustainable energy economy, even more as they can be used in energy storage devices. Here we report the synthesis of N‐doped carbons from hydrothermal carbonization of macroalgae, Enteromorpha prolifera (EP), followed by a mild KOH activation step. The obtained N‐doped carbons exhibited surface areas of up to ∼2000 m2/g with N‐loadings varied in the range of 1.4∼2.9 at %. By modifying activation temperature, we were able to tune the surface chemistry and porosity, achieving excellent control of their properties. The specific capacitance reached values of up to 200 F/g at 1 A/g in 6 M KOH for the sample obtained at activation temperature of 700 °C (AHC‐700). The symmetric supercapacitor using the sample activated at 800 °C (AHC‐800) as electrodes exhibited the highest cycling stability of the samples studied in this work, with capacitance retention of up to 96 % at 10 A/g, even after 10,000 cycles, constituting the highest reported for biomass‐derived carbon electrodes. These results show the great potential of N‐doped carbons as electrodes for supercapacitors and confirm the excellent electrochemical properties of biomass‐derived carbons in energy storage technologies.

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Section: Resultsmentioning

confidence: 98%

“…It mainly consists of lipids, carbohydrates, proteins, and nucleic acid, all of which is excellent precursor for carbon materials ,. Gu et al . reported carbons from cyanobacteria pyrolysis with surface area of 2184 m 2 /g, showing a specific capacitance of 222 F/g at 5 A/g in 6 M KOH.…”

Section: Introductionmentioning

confidence: 99%

High Performance N‐Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications

et al. 2018

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“…In order to reduce the emission of CO 2 by the combustion of fossil fuels, such as coal and gasoline, it is imperative to develop environmentally friendly power sources for the mitigation of climate warming [1][2][3][4][5][6][7][8][9]. Ni/MH batteries with high power density…”

Section: Introductionmentioning

confidence: 99%

Preparation of 3D spherical Ni/Al LDHs with significantly enhanced electrochemical performance as a superior cathode material for Ni/MH batteries

Nie

Pan

et al. 2018

Electrochimica Acta

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Nickel-based hydroxides with excellent electrochemical performance have been considered as cathode materials for Ni/MH batteries. In this paper, a Ni/Al layered double hydroxides (Ni/Al LDHs) material with three-dimensional (3D) spherical structure is synthesized by a facile stable dual complexation-precipitation method. SEM images show that the obtained Ni/Al LDHs possess 3D spherical structure composed of nanosheets. XRD and CV tests indicate that doping of Al increases the distance between Ni-Al layers, greatly improving the specific capacity of the obtained materials. The electrochemical tests show that the specific capacity of the obtained material with 18% Al is up to 383.4 mAh g −1 at a current density of 1 A g −1. In addition, when the current density is further increased to 10 and 20 A g −1 , the specific capacity of this material still maintains 345.0 mAh g −1 and 307.9 mAh g −1 , respectively, which implies that this cathode material can provide remarkable power densities. Moreover, the material composed of Ni/Al LDHs keeps 97.6% initial capacity after 5,000 cycles at a current density of 10 A g −1 , showing an excellent cycling stability and durability.

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“…8,9 Recently, abundant research into porous materials including carbon materials, [10][11][12][13] zeolites, 14,15 metal-organic frameworks (MOFs), [16][17][18] and covalent organic frameworks (COFs) 19,20 has been widely undertaken. 32 However, not all cyanobacteria are benecial to the environment and human health; some cyanobacteria grow and expand too fast, contaminating freshwater and creating toxins. 21,22 In general, a large surface area and large micropore volume are essential for enhancing the uptake of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 In general, a large surface area and large micropore volume are essential for enhancing the uptake of hydrogen. 32 In this study, for use as low-cost, abundant and available carbon precursors, cyanobacteria (CB) obtained from Dianchi in Yunnan Province, China were prepared for precursors. 4 However, from the viewpoint of sustainability, environment-friendliness, and continuous availability, biomass-based materials are more promising sources of carbon for porous carbons.…”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of modified cyanobacteria-derived activated carbon for H₂ adsorption

et al. 2017

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A series of porous carbon sorbents obtained by carbonization and activation by KOH/ZnCl 2 of the abundant waste material cyanobacteria was utilized for the adsorption of H 2 . During experiments to determine the optimal activation parameters, the activation time had little effect, whereas the KOH/C and ZnCl 2 /C mass ratios and activation temperature had a significant impact on adsorption performance. Samples activated by KOH exhibited better adsorption characteristics (such as higher values of S BET , V total , V micro , etc.) than those activated by ZnCl 2 . In particular, ACK-2-8, which had an S BET of 1951 m 2 g À1 , displayed H 2 uptake capacities of nearly 17.3 mg g À1 at À196 C and 1 bar. In addition, for evaluation of the H 2 adsorption performance, N-doped and P-doped porous carbons were synthesized using HNO 3 , NH 3 $H 2 O and H 3 PO 4 , respectively, to modify the abovementioned cyanobacteria-derived activated carbon ACK-2-8, and exhibited H 2 adsorption amounts that were 16.8%, 31.8%, and 45.7% higher, respectively, than those of undoped ACK-2-8. Furthermore, it was remarkable that P-doping in conjunction with a moderately high S BET enhanced the uptake of H 2 by ACK-2-8-2, which had a smaller S BET than ACK-2-8-3 but the best uptake capacity of up to 25.2 mg g À1 , and thereby showed that the relationship between the H 2 adsorption capacity and S BET of these materials was scarcely linear and was therefore noticeably different from previously reported results for the uptake of H 2 by other carbon sorbents. Hence, it is probable that the considerable H 2 adsorption properties of the material with a moderate S BET have great potential applications for hydrogen capture or storage.

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Pyrolytic cyanobacteria derived activated carbon as high performance electrode in symmetric supercapacitor

Cited by 30 publications

References 32 publications

High Performance N‐Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications

High Performance N‐Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications

Preparation of 3D spherical Ni/Al LDHs with significantly enhanced electrochemical performance as a superior cathode material for Ni/MH batteries

Preparation and evaluation of modified cyanobacteria-derived activated carbon for H₂ adsorption

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Pyrolytic cyanobacteria derived activated carbon as high performance electrode in symmetric supercapacitor

Cited by 30 publications

References 32 publications

High Performance N‐Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications

High Performance N‐Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications

Preparation of 3D spherical Ni/Al LDHs with significantly enhanced electrochemical performance as a superior cathode material for Ni/MH batteries

Preparation and evaluation of modified cyanobacteria-derived activated carbon for H2 adsorption

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Preparation and evaluation of modified cyanobacteria-derived activated carbon for H₂ adsorption