High capacitance and energy density supercapacitor based on biomass-derived activated carbons with reduced graphene oxide binder

Choi, Jong Bo; Lee, Chong Min; Cho, Sung-Whan; Moon, Geon Dae; kim, Byung-su; Chang, Hyunju; Jang, Hee Dong

doi:10.1016/j.carbon.2018.01.105

Cited by 143 publications

(44 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These are the characteristic Raman peaks for carbon materials. The peak at approximately 1500 cm −1 is characteristic of amorphous sp 2 ‐hybridized carbon, whereas the broad peak at approximately 1170 cm −1 indicates the presence of functional groups, such as C=O . The ratio of the relative integrated intensity of the D and G bands (I D /I G ) represents the degree of graphitization.…”

Section: Resultsmentioning

confidence: 99%

“…Supercapacitors are being considered as promising energy storage devices because of their high power density, high reversibility, and long cycle life. The large surface area and high electronic conductivity of electrode materials are in demand because the capacitances of supercapacitors depend on the electrochemical double layer (EDL) formed by the interaction between the surface of the electrode materials and the electrolyte . Porous carbon materials are most commonly used as electrode materials for supercapacitors because they are economically, ecologically, and technologically acceptable according to modern green chemistry principles .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen‐Immobilized, Ionic Liquid‐Derived, Nitrogen‐Doped, Activated Carbon for Supercapacitors

et al. 2020

View full text Add to dashboard Cite

To synthesize nitrogen‐remained activated carbon (AC) following KOH activation, nitrile‐functionalized ionic liquid (IL) that immobilizes nitrogen atoms in the form of aromatic amines, such as graphitic, pyridinic, or pyrrolic nitrogen, was synthesized and used as a carbon precursor. Aromatic amines are more robust in adverse conditions than aliphatic amines. The nitrogen‐doped (N‐doped) AC was prepared by activating the carbon derived from the nitrile‐functionalized IL that acts as both a carbon precursor and a nitrogen‐doping source. The N‐doped AC had an optimized doped nitrogen and porous structure, and was prepared by controlling the activation conditions. The nitrogen residue in the N‐doped AC after KOH activation enhanced electrochemical properties of the N‐doped AC. Thus, it is important to use a carbon precursor that includes immobilized nitrogen to effectively prepare the AC after the KOH activation.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen‐Immobilized, Ionic Liquid‐Derived, Nitrogen‐Doped, Activated Carbon for Supercapacitors

et al. 2020

View full text Add to dashboard Cite

show abstract

“…A super-capacitor has very high value of capacitance more than other capacitors [129]. The storage ability of super-capacitors is 10 to 100 times more than electrolytic capacitors.…”

Section: Transition Metal Oxides-graphene Compositesmentioning

confidence: 99%

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

Hussain

Ihrar

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

Two-dimensional (2D) graphene and its outstanding properties such as, enormous conductivities, mechanical strength, optical and electrical properties brought it one of the most studied materials for the production of energy using renewable resources. The composites of graphene with the same morphological materials such as layered transition metal oxides will be the most aspiring combination to boost their conducting, optoelectronic and mechanical properties. Furthermore, the transition metal chalcogenides materials attracted significant attention due to their atomically thin layers and enormous optical, conducting and electrical properties. The layered materials offer mostly atomically thin 2D plane to the charge carrier with superior conducting properties. The thickness at atomic level, band gap, spin orbit coupling electronic and optoelectronics properties of transition metal dichalcogenides makes them one of the promising entities in energy harvesting technologies. The review suggests some strategies to improve the transition metals-composites stability conducting properties to be tailored in various applications.

show abstract

“…As shown in Figure b, the frequencies at which the resistance and reactance have equal magnitudes for AMFGW and AWC are 0.75 and 0.51 Hz, respectively, corresponding to the characteristic relation time constants of 1.33 and 1.96 s ( τ 0 =1/ f 0 ). This τ 0 value of AMFGW is considerably smaller than that of reported willow catkin based N, S co‐doped porous carbon nanosheets (4.54 s), activated graphene‐based carbon (1.67 s), N‐doped ordered mesoporous few‐layer carbon (2.10 s), seaweed based porous carbon (2.4 s), boron and nitrogen co‐doped porous carbon tube bundle (4.42 s) [38] and significantly lower than that of commercial active carbons (10–100 s) . The small τ 0 signal fast ion transport of AMFGW and corresponds to its superior rate capability …”

Section: Resultsmentioning

confidence: 85%

Rational Design of Highly Conductive Nitrogen‐Doped Hollow Carbon Microtubes Derived from Willow Catkin for Supercapacitor Applications

et al. 2019

View full text Add to dashboard Cite

The rational design of carbon materials with high electrical conductivity, low tortuosity, large specific surface area, and sufficient heteroatom doping for high-performance supercapacitor application is highly desired but remains as a major challenge. Herein, by templating the natural microtubular and thin-walled structure of willow catkin, a highly conductive nitrogen-doped hollow carbon microtube material was synthesized through an integrated procedure including polymerization, pyrolysis, and activation. Robust N-doped crosslinked graphene was grafted on the internal and external walls of carbonized hollow catkin to form a sandwich structure of the derived carbon. The obtained carbon microtubes exhibit a large specific surface area (2608 m 2 g À 1 ), short and unimpeded ion-diffusion paths, high-level heteroatom doping (O: 12.5 at %, N: 3.4 at %), and excellent electrical conductivity (128 S m À 1 ). Benefitting from its desirable textural properties and favorable elemental composition, the derived electrode, without the addition of conductive additives, delivers impressive capacitance values of 408 F g À 1 (0.5 A g À 1 ) in 6 M KOH electrolyte and 420.8 F g À 1 (1 A g À 1 ) in 1 M H 2 SO 4 , as well as an outstanding rate capability and excellent cycling stability. In addition, the assembled symmetric supercapacitor displays an ultrahigh energy density of 27.3 Wh kg À 1 at 182 W kg À 1 in 1 M Na 2 SO 4 electrolyte. These advanced characteristics ensure the carbon microtubes hold great promise for energy storage/conversion applications.

show abstract

High capacitance and energy density supercapacitor based on biomass-derived activated carbons with reduced graphene oxide binder

Cited by 143 publications

References 51 publications

Nitrogen‐Immobilized, Ionic Liquid‐Derived, Nitrogen‐Doped, Activated Carbon for Supercapacitors

Nitrogen‐Immobilized, Ionic Liquid‐Derived, Nitrogen‐Doped, Activated Carbon for Supercapacitors

A review on graphene based transition metal oxide composites and its application towards supercapacitor electrodes

Rational Design of Highly Conductive Nitrogen‐Doped Hollow Carbon Microtubes Derived from Willow Catkin for Supercapacitor Applications

Contact Info

Product

Resources

About