In-situ template cooperated with thiourea to prepare oxygen/nitrogen co-doped porous carbons with adjustable pore structure for supercapacitors

Zhou, Yuhao; Ren, Xue; Song, Mingyuan; Du, Yueyao; Wan, Jiafeng; Wu, Guozhang; Ma, Fangwei

doi:10.1016/j.renene.2020.02.075

Cited by 37 publications

(9 citation statements)

References 59 publications

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“…Moreover, the high capacitance retention (90.2% between 1 and 100 A g –1 ) also confirms the highly reversibility because of the cross-linked structure. The assembled cell delivers a high power density of 14.3 kW kg –1 , which is higher than that of other reported porous carbon. − The high value of power output further demonstrates that the cross-linked structure could improve the power density of the device. The cell also presents excellent cycling stability with 97.5% retention after 20,000 cycles at 5 A g –1 , demonstrating good lifetime and durability.…”

Section: Resultsmentioning

confidence: 85%

Flexible Cross-Linked Electrospun Carbon Nanofiber Mats Derived from Pitch as Dual-Functional Materials for Supercapacitors

Tian

Song

et al. 2020

Energy Fuels

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Freestanding and binder-free electrospun carbon nanofiber mats with a cross-linked structure (CLCF) were fabricated by using pitch as the precursor. The cross-linked structure can be tuned easily by controlling the preoxidation degree of electrospun nanofibers. This cross-linking strategy can not only convert low value pitch into economical efficient energy storage materials but also reduce contact resistance and enhance ion diffusion kinetics of the as-obtained CLCF by reducing the fiber diameter, balancing porous structure, and conductivity. The CLCF electrode with a moderate preoxidation degree exhibits remarkable rate performance (160 F g–1 at 100 A g–1, 85.6% of its initial capacity at 1 A g–1) in 6 M KOH aqueous electrolyte, compared with carbon nanofibers without and with an overdose of cross-linked structure. Moreover, as a scaffold for depositing NiMoO4, impressive electrochemical performance can be achieved. The assembled asymmetrical device based on CLCF and NiMoO4-anchored CLCF delivers a stable working voltage of 1.6 V with a high energy output of 14.9 Wh kg–1 and a maximum power density of 14.3 kW kg–1. The intriguing electrochemical performance can be credited to the cross-linked fibrous structure that endows the CLCF with rapid ion diffusion kinetics and fast electron transfer as well as robust structural stability to bear the volume fluctuation of NiMoO4 during the repeated charge/discharge process. Therefore, our work provides a new strategy to design high performance carbon nanofiber mats with a cross-linked structure as a dual-functional material for supercapacitor devices by using pitch.

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Section: Resultsmentioning

confidence: 85%

Flexible Cross-Linked Electrospun Carbon Nanofiber Mats Derived from Pitch as Dual-Functional Materials for Supercapacitors

Tian

Song

et al. 2020

Energy Fuels

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“…It needs to be stressed that PSN‐PSC exhibits relatively narrow pore size distributions, including micropores ∼2 nm and mesopores centered in the range of 2–3 nm. This phenomenon can be ascribed to the addition of thiourea which is served as a micropore template that contributed to the formation of more micropores [40] . Table 1 showed the structure parameters of P‐PSC, PN‐PSC and PSN‐PSC.…”

Section: Resultsmentioning

confidence: 99%

“…This phenomenon can be ascribed to the addition of thiourea which is served as a micropore template that contributed to the formation of more micropores. [40] Table 1 showed the structure parameters of P-PSC, PN-PSC and PSN-PSC. The specific surface area and total pore volume of PSN-PSC (2046.54 m 2 g À 1 and 1.01 cm 3 g À 1 ) were larger than that of P-PSC (310.25 m 2 g À 1 and 0.46 cm 3 g À 1 ) and PN-PSC (540.17 m 2 g À 1 , 0.43 cm 3 g À 1 ), which was possibly on account of the synergistic effect of potassium phosphate activation and thiourea addition due to the pore-forming effect of gases released from thermolabile thiourea.…”

Section: Chemelectrochemmentioning

confidence: 99%

Synthesis of P, S, N, Triple‐Doped Porous Carbon from Steam Explosion Pretreated Peanut Shell as Electrode Material Applied on Supercapacitor

Ding

Liu

et al. 2022

ChemElectroChem

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Triple‐doped (P, S and N) peanut‐shell carbon (PSN‐PSC) was fabricated by a flexible one‐step strategy. The obtained carbon displayed large specific surface area and multiple porous structures, hence it was suitable in applying on supercapacitor as electrode materials. Steam explosion was performed to pretreat peanut shells for the purpose of preliminarily creating pore structure. Potassium phosphate was used as activating agent and supplied phosphorus atom. Thiourea was added as pore‐generating agent, as well as nitrogen and sulfur sources. The extremely high specific surface area (2046 m2 g−1) and hierarchical porous structure of the PSN‐PSC increased the accessibility of the carbon surface to the electrolyte, which shortened the ion diffusion pathway. Besides, the heteroatoms (P, S, N) doping improved the ability of energy storage and capacitive property. The synergistic effect of heteroatom doping and hierarchical structure endowed PSN‐PSC with the highest specific capacitance of 334.7 F g−1 at 0.1 A g−1 and with remarkable cycle stability of 96 % retention for 10000 cycles in 6 m KOH electrolyte in a three‐electrode system with a 3.0 mg cm−2 mass loading of PSN‐PSC. Furthermore, the PSN‐PSC symmetric supercapacitor reached an excellent energy density of 19.92 Wh kg−1 under 70 W kg−1 in a 6 m KOH electrolyte. This work demonstrates a novel, convenient method for fabricating heteroatom doped carbon electrode materials, especially based on pretreated biomass wastes.

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“…Template strategies (hard template, soft template, and dual-template) are efficient for preparing porous materials with controlled pore size distribution and moderate morphologies [ 34 , 35 ]. For instance, B and N were doped in carbon nanosheets via a simple dual-template method ( Figure 6 ) using methyl cellulose as a carbon precursor.…”

Section: Synthesis Of Biopolymeric Materials For Supercapacitorsmentioning

confidence: 99%

Biopolymers-Derived Materials for Supercapacitors: Recent Trends, Challenges, and Future Prospects

et al. 2022

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Supercapacitors may be able to store more energy while maintaining fast charging times; however, they need low-cost and sophisticated electrode materials. Developing innovative and effective carbon-based electrode materials from naturally occurring chemical components is thus critical for supercapacitor development. In this context, biopolymer-derived porous carbon electrode materials for energy storage applications have gained considerable momentum due to their wide accessibility, high porosity, cost-effectiveness, low weight, biodegradability, and environmental friendliness. Moreover, the carbon structures derived from biopolymeric materials possess unique compositional, morphological, and electrochemical properties. This review aims to emphasize (i) the comprehensive concepts of biopolymers and supercapacitors to approach smart carbon-based materials for supercapacitors, (ii) synthesis strategies for biopolymer derived nanostructured carbons, (iii) recent advancements in biopolymer derived nanostructured carbons for supercapacitors, and (iv) challenges and future prospects from the viewpoint of green chemistry-based energy storage. This study is likely to be useful to the scientific community interested in the design of low-cost, efficient, and green electrode materials for supercapacitors as well as various types of electrocatalysis for energy production.

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In-situ template cooperated with thiourea to prepare oxygen/nitrogen co-doped porous carbons with adjustable pore structure for supercapacitors

Cited by 37 publications

References 59 publications

Flexible Cross-Linked Electrospun Carbon Nanofiber Mats Derived from Pitch as Dual-Functional Materials for Supercapacitors

Flexible Cross-Linked Electrospun Carbon Nanofiber Mats Derived from Pitch as Dual-Functional Materials for Supercapacitors

Synthesis of P, S, N, Triple‐Doped Porous Carbon from Steam Explosion Pretreated Peanut Shell as Electrode Material Applied on Supercapacitor

Biopolymers-Derived Materials for Supercapacitors: Recent Trends, Challenges, and Future Prospects

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