A high-performance supercapacitor electrode based on N-doped porous graphene

Dai, Shuge; Liu, Zhen; Zhao, Bote; Zeng, Jianhuang; Hu, Hao; Zhang, Qiaobao; Chen, Dongchang; Qu, Chong; Dang, Dai; Liu, Meilin

doi:10.1016/j.jpowsour.2018.03.055

Cited by 226 publications

(81 citation statements)

References 37 publications

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“…It can be attributed to the formation of a large number of single carbon sheets as illustrated in TEM images . In addition, discontinuity of carbon matrix structure resulting from porous structure also leads to this phenomenon …”

Section: Resultsmentioning

confidence: 98%

“…Carbon materials, such as activated carbon, graphene, carbon nanotubes, porous carbon, and so on, are frequently used as active component in EDLC because of the superior chemical stability, facile preparation, and adjustable structure. Valid specific surface area, appropriate pore size distribution matching ion sizes of electrolyte, and good electrical conductivity are indispensable for improving charge storage ability of EDLC .…”

Section: Introductionmentioning

confidence: 99%

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A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft‐Templating Approach for High‐Performance Supercapacitor

et al. 2020

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Carbon with a 3D foam structure is synthesized by a one‐step strategy using low‐molecular‐weight phenolic resin as the precursor and CsCl as a salt template. Their electrochemical performance as electrodes is studied for symmetric supercapacitors. The distinct effect of CsCl addition amount on morphology, pore structure, electric conductivity, and electrochemical performance is further investigated. With appropriate CsCl addition amount, 3D carbon foam is harvested with abundant micropores and mesopores with a surface area beyond 1590 m2 g−1. It is tested as an electrode in a coin‐type symmetric supercapacitor with 6 m KOH and 1 m TEABF4/MeCN as the electrolyte. The 3D carbon foam electrode displays specific capacitance of 259.3 F g−1 in 6 m KOH and 127.9 F g−1 in 1 m TEABF4/MeCN at 0.5 A g−1. Notably, it exhibits high energy density of 27.7 W h kg−1 in 1 m TEABF4/MeCN. After 10 000 cycles, the specific capacitance remains at 96.9% in 6 m KOH, indicating good cycle stability. The superior performance of 3D carbon foam is attributed to larger surface area, higher electric conductivity, and unique 3D foam structure with sufficient 3D ion‐accessible channels. This work develops a simple, facile method to synthesize high‐performance supercapacitor electrode materials.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft‐Templating Approach for High‐Performance Supercapacitor

et al. 2020

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“…CV curves (a, b), the rate performance (c), the IR drops (d) and life span (e) at 10 a/g. Ragone plots (f) of the CNS3 in 1 M TEABF4/PC and pure EMIMBF4 electrolyte, vs. PCN6@ TEABF4/PC‐2.7 V&EMIMBF4‐3.5 V, PCF‐900@EMIMBF4‐3.5 V, NHP − HA/KOH@TEABF4/AN‐2.7 V& EMIMBF4‐3.5 V, PCG@TEABF4/AN‐2.7 V, A1G@TEABF4/AN‐2.7 V, C‐700@TEABF4/AN‐2.7 V, F310‐800@EMIMBF4‐3.5 V, CDC@TEABF4/AN‐2.7 V&EMIBF4‐3.5 V, HPGCS@TEABF4/AN‐2.7 V, N‐rGO@BMIMBF4‐3.5 V, HPC@ [EMIM][TFSI]‐3.5 V, and CMCN‐7@ EMIMBF4‐3.5 V…”

Section: Resultsmentioning

confidence: 99%

Porous carbon nanospheres with moderately oriented domains for EDLC electrode

Xiao

Chang

Zhang

et al. 2019

J Chinese Chemical Soc

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Porous carbon nanospheres with moderately oriented microcrystalline structures were prepared via a relatively simple synthetic route in this article. CTAB acted as a structure‐directing agent to induce small sulfonated pitch (SP) pieces to assemble orderly. By this means, the formation of carbon nanospheres was simultaneous with the moderate orientation of carbon microcrystalline without additional process. Owing to the moderately oriented microcrystalline structures, the resultant sample CNS3 possessed a high e‐conductivity of 62.5 S/m. When used as an electrode material for EDLCs, it showed excellent electrochemical properties even without any conductive agent. In an organic electrolyte, the resultant sample CNS3 possessed a high specific capacitance of 155 F/g at 20 A/g and outstanding cycle life with 94.2% capacity retention after 10,000 cycles. This work puts forward a novel design for carbon nanospheres with moderately oriented domains by a simple and energy‐efficient means.

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“…This is because pyrrolic‐N is thermally unstable and is gradually transformed into graphitic‐N as the temperature increases . It has been reported that both pyridinic‐N and graphitic‐N can contribute one pair of electrons to the conductive π‐system and greatly enhance the conductivity of carbonaceous materials ,. Pyridinic‐N can also have a large pseudo‐capacitive effect, and graphitic‐N can facilitate electron transfer, promote interactions with anions in the electrolyte, and induce electrical double‐layer capacitance ,.…”

Section: Resultsmentioning

confidence: 99%

Green Conversion of Microalgae into High‐Performance Sponge‐Like Nitrogen‐Enriched Carbon

et al. 2018

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The selective conversion of biomass into high-value carbon materials has recently been attracting increasing attraction. In this study, a microalga with a high nitrogen content, namely Spirulina platensis, was used as both the carbon and nitrogen precursors in the synthesis of sponge-like nitrogen-enriched carbon materials through a one-step activation method with NaHCO 3 as a green activator. The sponge-like nitrogen-enriched carbon materials obtained at different activation temperatures were systematically characterized by using SEM, N 2 adsorption-desorption, XRD, Raman, and XPS techniques. A series of tests were performed to investigate the electrochemical characteristics of the obtained carbon materials to determine their potential use as supercapacitors. The results show that spongelike nitrogen-enriched carbon activated at 700°C, which has a large BET surface area of 865 m 2 /g and a high nitrogen content of 7.5 wt%, gave the largest specific capacitance of 234.0 F/g at a current density of 1 A/g in a 6 M KOH electrolyte.

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A high-performance supercapacitor electrode based on N-doped porous graphene

Cited by 226 publications

References 37 publications

A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft‐Templating Approach for High‐Performance Supercapacitor

A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft‐Templating Approach for High‐Performance Supercapacitor

Porous carbon nanospheres with moderately oriented domains for EDLC electrode

Green Conversion of Microalgae into High‐Performance Sponge‐Like Nitrogen‐Enriched Carbon

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