High-Performance Flexible Supercapacitors obtained via Recycled Jute: Bio-Waste to Energy Storage Approach

Zequine, Camila; Ranaweera, C. K.; Wang, Z.; Dvornić, Petar R.; Kahol, Pawan K.; Singh, Sweta; Tripathi, Prashant; Srivastava, O.N.; Singh, Satyendra; Gupta, Bipin Kumar; Gupta, Gautam; Gupta, Ram K.

doi:10.1038/s41598-017-01319-w

Cited by 136 publications

(70 citation statements)

References 61 publications

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“…For example, jute rope showed a yield of 11%, while kapok fibers produced carbon with a 20% yield. [18,26] This suggests that the carbonization of tea leaves is a high yield process and could be adopted for large scale production.…”

Section: Resultsmentioning

confidence: 99%

“…With increasing use of handhold electronic devices, desirable factors such as light weight, high performance, and consistent porosity. [18] KOH activated carbon from rice bran showed a high surface area of 2475 m 2 g −1 . [15,16,19] Several KOH-based activated carbon derivations from various sources for supercapacitor applications have been reported.…”

Section: Introductionmentioning

confidence: 99%

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Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

et al. 2017

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energy supply are required. Hence, an efficient local energy storage/production system plays a vital role for such applications. [1] The supercapacitor is one of the efficient energy storage systems which can store energy via electric double layer and faradic reactions. [2,3] The electric double layer capacitor (EDLC) stores the charge over the active surface area of the material and shows very durable performance over long period. [3,4] Thus, creating carbon with a high surface area could be one of the ways to improve the performance of EDLC-based supercapacitor devices. There are several publications documenting the utilization of waste-derived carbon source such as seeds, seed shells, leaves, bagasse, waste paper, and tyre. [5][6][7][8][9][10][11][12] Waste tea is an additional exciting source for carbon. [13] Most of the time, an activation step is required to achieve the high surface area to enhance the performance of the carbon. Activation of waste-derived carbon can be done using various methods including chemical, steam, and CO 2 -based activation. [14][15][16][17] For example, steam activated carbon from fir wood showed an activated surface area of 1131 m 2 g −1 while, CO 2 activated empty fruit bunches of palm showed a surface area of 1704 m 2 g −1 . [12,13] KOH activation is the most popular way to create high surface area and Used tea leaves are utilized for preparation of carbon with high surface area and electrochemical properties. Surface area and pore size of tea leaves derived carbon are controlled by varying the amount of KOH as activating agent. The maximum surface area of 2532 m 2 g −1 is observed, which is much higher than unactivated tea leaves (3.6 m 2 g −1 ). It is observed that the size of the electrolyte ions has a profound effect on the energy storage capacity. The maximum specific capacitance of 292 F g −1 is observed in 3 m KOH electrolyte with outstanding cyclic stability, while the lowest specific capacitance of 246 F g −1 is obtained in 3 m LiOH electrolyte at 2 mV s −1 . The tea leaves derived electrode shows almost 100% capacitance retention up to 5000 cycles of study. The symmetrical supercapacitor device shows a maximum specific capacitance of 0.64 F cm −2 at 1 mA cm −2 and about 95% of specific capacitance is retained after increasing current density to 12 mA cm −2 , confirming the high rate stability of the device. An improvement over 35% in the charge storage capacity is seen when increasing device temperature from 10 to 80 °C. The study suggests that used tea leaves can be used for the fabrication of environment friendly high performance supercapacitor devices at a low cost.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

et al. 2017

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“…The deviation in the charge/discharge curves of carbon xerogel electrodes at low current density could be due to the structural properties as well as the dispersion of the particles, resulting in the different rates of adsorption and desorption of electrolyte ions [18,19]. In 6 M KOH electrolyte solution (Figures 7(a) and 7(b)) the ACX electrodes had longer charge/discharge time than the CX electrode, and the ACX-900 electrode exhibited the longest charge/discharge time, which resulted in higher specific capacitance of the ACX electrodes compared to that of the CX electrode.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

The Influence of the Activation Temperature on the Structural Properties of the Activated Carbon Xerogels and Their Electrochemical Performance

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Yang

Chung

et al. 2017

Advances in Materials Science and Engineering

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The effect of activation temperature on the structural properties and the electrochemical performance of KOH-activated carbon xerogel was investigated in range of 700 to 1000 ∘ C. At a high temperature (1000 ∘ C), the chemical activation regenerated a more crystalline network structure of activated carbon xerogels, which was observed by Raman, XRD, and TEM images. Additionally, SEM images, BET, BJH, and -plot were used to study the structural properties of carbon xerogels. The carbon xerogel sample activated at 900 ∘ C was found with the most appropriate structure, which has the high micropore area and a more-balanced porosity between the micropores and mesopores, for using as an electrode material. The highest obtained specific capacitance value was 270 Fg −1 in 6 M KOH electrolyte at scan rate of 5 mVs −1 from the cyclic voltammetry.

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“…The occurrence of this process at the interface of the electrode (GO‐wrapped PANI layer)/electrolyte (H 2 SO 4 ) and the consumption of overall current at the GO surface result in failure for activation of the redox material in PANI due to which the pseudocapacitive behavior is suppressed. (2) At higher current densities, the limited diffusion process occurs which results in lower time interval for the electrolytic ions to diffuse in the inner pores and thus resulting in poor involvement of active material in the redox reaction suppressing the redox behavior of the PANI . This leads to the occurrence of nearly symmetrical GCD curves for all densities in case of PANI/GO 10 nanocomposites respective to their corresponding discharge curves.…”

Section: Resultsmentioning

confidence: 99%

Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

et al. 2019

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This study depicts the chemical synthesis and supercapacitive behavior of nanocomposites of Polyaniline nanorods wrap with graphene oxide (PANI/GO). Synthesis of PANI/GO nanocomposites was carried out by in situ oxidative solution polymerization of aniline in the presence of Nitric acid, acting as a proton donor. The nanocomposites were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy, X‐ray diffraction, Raman spectroscopy, thermal gravimetric analysis, contact angle analysis, cyclic voltammetry, galvanostatic charge–discharge test and electrochemical impedance spectroscopy. FESEM revealed the formation of PANI nanorods with the aspect ratio in the range of 3–5, while TEM revealed the wrapping of GO sheets on the PANI nanorods. Thermal stability showed decreasing trend while surface hydrophobicity was of increasing trend with GO concentration due to partial reduction of GO, as observed in Raman spectra. PANI/10 wt% GO (PANI/GO10) nanocomposite electrode showed highest specific capacitance of 276 F/g as compared with 180 F/g of Pure PANI. Cyclic stability of 80% was retained for PANI/GO10 nanocomposites after 500 cycles at a current density of 0.5A/g as compared with unstable PANI. The enhanced specific capacitance and good cyclic stability with increasing GO concentration revealed the good potential of PANI/GO nanocomposites for supercapacitor applications. POLYM. COMPOS., 40:E1716–E1724, 2019. © 2019 Society of Plastics Engineers

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High-Performance Flexible Supercapacitors obtained via Recycled Jute: Bio-Waste to Energy Storage Approach

Cited by 136 publications

References 61 publications

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

The Influence of the Activation Temperature on the Structural Properties of the Activated Carbon Xerogels and Their Electrochemical Performance

Graphene oxide‐wrapped polyaniline nanorods for supercapacitor applications

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