High Per formance and Flexible Supercapacitors based on Carbonized Bamboo Fibers for Wide Temperature Applications

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

doi:10.1038/srep31704

Cited by 199 publications

(90 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This increasing capacitance is likely due to gradual structural change in the optimized carbon with cycling that allows for better electrolyte ion access into micro‐pores. Similar effects have been previously observed to occur in electrochemical capacitive carbons synthesized from carbonized bamboo fibers …”

Section: Resultssupporting

confidence: 86%

Optimized Electrolytic Carbon and Electrolyte Systems for Electrochemical Capacitors

2020

View full text Add to dashboard Cite

Electrochemical reduction of a molten Li2CO3−Na2CO3−K2CO3 eutectic is used to produce highly amorphous carbon with considerable oxygen functionalization in a process focusing on the conversion of CO2 to value‐added carbon. Electrochemical characterization of materials using multiple techniques in different electrolytes allowed for the optimization of these materials as electrochemical capacitor electrodes. Variation in capacitive performance of the investigated materials has been provided based on their physical characteristics. The synthesized carbons are hybrid materials, showing both pseudocapacitive and electric double layer contributions to the total performance. Annealing under nitrogen at 800 °C is shown to widen pores in the carbon material, resulting in an increase in medium scan rate (5–10 mV.s−1) capacitance. A stable specific capacitance of 425 F.g−1 is obtained at 5 mV s−1 in 0.5 M Na2SO4 after 1000 cycles.

show abstract

Section: Resultssupporting

confidence: 86%

Optimized Electrolytic Carbon and Electrolyte Systems for Electrochemical Capacitors

2020

View full text Add to dashboard Cite

show abstract

“…The retention initially increases to ≈110% of the initial value because of the surface chemical activation of the composite electrode and subsequently better access of the electrolyte ions into the porous LIG assembly during the charging–discharging cycle; a similar behavior has also been reported in the literature. [ 61 ] The measurements were carried in an ambient atmosphere and without any encapsulation and thus establish the suitability of the two‐electrode device as a long‐term energy storage module.…”

Section: Resultsmentioning

confidence: 99%

Recycled Red Mud–Decorated Porous 3D Graphene for High‐Energy Flexible Micro‐Supercapacitor

Bhattacharya

Fishlock

Pritam

et al. 2020

Advanced Sustainable Systems

View full text Add to dashboard Cite

Flexible micro‐supercapacitors, with high energy and power density, and using materials with a low environmental impact are attractive for next‐generation energy storage devices. Carbon‐based materials are widely used for supercapacitors but can be increased in energy density via combination with metal oxides. Red mud is an iron‐oxide‐rich by‐product of aluminum production, which needs to be more widely utilized to reduce its environmental damage. To achieve a flexible micro‐supercapacitor device with increased energy density, a laser‐induced graphene (LIG) supercapacitor is realized from a polyimide substrate, decorated with red‐mud nanoparticles (LIG‐RM), employing a solid‐state ionic liquid electrolyte with a mixture of poly(vinylidene fluoride) (PVDF), 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMI][TFSI]), and 1‐ethyl‐3‐methylimidazolium tetrafluoroborate ([EMIM][BF4]). The fabricated two‐electrode flexible device, in an interdigitated planar design, with inkjet‐printed silver current collectors, has a high energy of 0.018 mWh cm−2 at a power of 0.66 mW cm−2, with 81% of capacitance retained after 4000 cycles and good resistance to bending and flexing. The high energy storage performance, brought about through the combination of graphene and red‐mud nanoparticles, which would—if not utilized—be an environmental liability, shows a promise as a material for future energy storage with low environmental impact.

show abstract

“…Similar behavior was observed in our past results as well as other reports where, with increasing temperature the charge storage capacity of the electrode material increased. [60,61] The cyclic stability of the device was further studied at elevated temperature using galvanostatic measurement. The cyclic performance of the device at 70 °C is shown in Figure 12e.…”

Section: Wwwglobal-challengescommentioning

confidence: 99%

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

et al. 2017

Self Cite

View full text Add to dashboard Cite

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.

show abstract

High Per formance and Flexible Supercapacitors based on Carbonized Bamboo Fibers for Wide Temperature Applications

Cited by 199 publications

References 29 publications

Optimized Electrolytic Carbon and Electrolyte Systems for Electrochemical Capacitors

Optimized Electrolytic Carbon and Electrolyte Systems for Electrochemical Capacitors

Recycled Red Mud–Decorated Porous 3D Graphene for High‐Energy Flexible Micro‐Supercapacitor

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

Contact Info

Product

Resources

About