Facile synthesis of hierarchical porous carbon derived from carboxyl graphene oxide/phenolic foam for high performance supercapacitors

Li, Xiaozheng; Li, Xi; Zhou, Jian; Dong, Yaping; Xie, Zhipeng; Cai, Weiquan; Zhang, Chaocan

doi:10.1039/c7ra08602d

Cited by 19 publications

(3 citation statements)

References 75 publications

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“…Using an easy and cost effective method, graded porous carbon materials have been synthesized by foaming and carbonization of phenolic resin‐carboxyl graphene oxide composite. [ 117 ] The fabricated foams consisted of macropores, mesopores, and micropores due to the foaming process, ester group degradation, and polymer carbonization was confirmed by morphological analysis. The rational distribution of hierarchical porous structures facilitates the transport of electrons and ions by achieving excellent electrical conductivity, by decreasing the distance of ion transport and increasing the charge accommodation.…”

Section: Introductionmentioning

confidence: 93%

A comprehensive review on phenol‐formaldehyde resin‐based composites and foams

Ravindran

Sreekala

et al. 2022

Polymer Composites

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This article covers the introduction to polymer composites, phenol formaldehyde resin, phenol formaldehyde composites, and foams along with their properties and applications. The previous research in the fields of phenol formaldehyde composites, nanocomposites, and PF foams is also covered in depth. Various combinations of nanomaterials and processes have been investigated in the field of structural composites to meet the requirements of industries such as automotive, aerospace, military, civil, and construction. Due to their different features and possibilities when compared to equivalents composed of other polymers, particularly thermosets, phenol-formaldehyde reinforced composites are commonly used for large load bearing structural applications. Composite properties can be improved by using nanoparticles, which are materials that have been developed as a result of advances in nanotechnology. This research focuses on a literature review of nanofillers' use to improve the structural properties of phenol-formaldehyde composites and foams published in the last two decades. The use of nanomaterials to modify composites is examined in depth.

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Section: Introductionmentioning

confidence: 93%

A comprehensive review on phenol‐formaldehyde resin‐based composites and foams

Ravindran

Sreekala

et al. 2022

Polymer Composites

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“…For example, Li et al . reported the use of foaming to prepare hierarchical porous carbon materials from phenolic resin and carboxyl graphene oxide, [34] but this process was limited by its requirement of analytical grade chemicals and multiple processing steps. The preparation of ACNSs from banana leaves, in contrast, would not only minimize costs but also help convert biowaste to valued materials, hence providing an economic argument for the sustainability of supercapacitor technology.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hierarchical Porous Activated Carbon from Banana Leaves for High‐performance Supercapacitor: Effect of Type of Electrolytes on Performance

Roy

Shah

Reaz

et al. 2021

Chemistry An Asian Journal

105

103

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We demonstrate a facile efficient way to fabricate activated carbon nanosheets (ACNSs) consisting of hierarchical porous carbon materials. Simply heating banana leaves with K2CO3 produce ACNSs having a unique combination of macro‐, meso‐ and micropores with a high specific surface area of ∼1459 m2 g−1. The effects of different electrolytes on the electrochemical supercapacitor performance and stability of the ACNSs are tested using a two‐electrode system. The specific capacitance (Csp) values are 55, 114, and 190 F g−1 in aqueous 0.5 M sodium sulfate, organic 1 M tetraethylammonium tetrafluoroborate in acetonitrile, and pure ionic liquid 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([BMIM][PF6]) electrolytes, respectively. The ACNSs also shows the largest potential window of 3.0 V, the highest specific energy (59 Wh kg−1) and specific power (750 W kg−1) in [BMIM][PF6]. A mini‐prototype device is prepared to demonstrate the practicality of the ACNSs.

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“…Ultimately limiting the accessibility of the electrolytes present. 28,[30][31][32] Fabrication of three-dimensional (3D) architecture of graphene is an alternative strategy to resist aggregation and lamellar stacking of rGO. [33][34][35][36][37][38] The 3D-structure of rGO can significantly enhance the surface area.…”

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confidence: 99%

Performance Improvement of Supercapacitor Materials with Crushed 3D Structured Graphene

Reaz¹,

Saha²,

Roy³

et al. 2022

J. Electrochem. Soc.

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Conventional 2D-graphene sheets (2D-rGO) often demonstrate poor performance as capacitor materials, especially in cyclability due to the lamellar stacking and agglomeration of the electrode materials. Herein, we have proposed that crushed 3D-graphene (c-3D-rGO) can overcome the limitation. A simplistic way to prepare 3D-crushed graphene structures has been presented utilizing metal rGO core-shell (Ni@rGO) followed by acid leaching. The electrochemical performances of the prepared c-3D-rGO were evaluated as capacitor material using a three-electrode system with aqueous 0.5 M Na2SO4 solution through cyclic voltammetry and galvanostatic charge-discharge measurements. 2D-rGO was separately prepared to compare the performance with 3D-crushed graphene structures. It has been observed that the calculated specific capacitance (Csp) value of the prepared c-3D-rGO was 335 Fg-1 at a current density of 0.15 Ag-1, which was about three times higher than that of the 2D-rGO. The c-3D-rGO electrode retained 100% capacitance of its initial value after 10000 cycles, demonstrating the material’s excellent electrochemical stability. Furthermore, to show the performance in hybrid capacitor, manganese oxide (MnOx) with c-3D-rGO. The presence of c-3D-rGO significantly improved the capacitive performance MnOx.

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Facile synthesis of hierarchical porous carbon derived from carboxyl graphene oxide/phenolic foam for high performance supercapacitors

Abstract: Hierarchical porous carbon materials were prepared using a facile and low-cost method from phenolic resin and carboxyl graphene oxide by foaming and carbonization and exhibited an excellent capacitive performance.

Cited by 19 publications

References 75 publications

A comprehensive review on phenol‐formaldehyde resin‐based composites and foams

A comprehensive review on phenol‐formaldehyde resin‐based composites and foams

Preparation of Hierarchical Porous Activated Carbon from Banana Leaves for High‐performance Supercapacitor: Effect of Type of Electrolytes on Performance

Performance Improvement of Supercapacitor Materials with Crushed 3D Structured Graphene

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