Graphene-based nitrogen self-doped hierarchical porous carbon aerogels derived from chitosan for high performance supercapacitors

Hao, Pin; Zhao, Zhenhuan; Leng, Yanhua; Tian, Jian; Sang, Yuanhua; Boughton, Robert I.; Wong, C.P.; Liu, Hong; Yang, Bin

doi:10.1016/j.nanoen.2015.02.035

Cited by 575 publications

(293 citation statements)

References 72 publications

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“…GO is superior because of its excellent electrical, thermal, mechanical, and optical properties. Hao et al [44] produced 'graphene-based-nitrogen self-doped hierarchical porous carbon' with outstanding performance by the carbonization of CS aerogel and activation with KOH. The obtained aerogel had macropores, mesopores, and micropores, as well as a high specific surface area.…”

Section: Wet Spinningmentioning

confidence: 99%

A review: synthesis and applications of graphene/chitosan nanocomposites

Yuan¹,

Meng²,

Park³

2016

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Recently, with continuous developments in the field of materials science, graphene oxide (GO) has emerged as a promising material with excellent electrical, thermal, mechanical, and optical properties, which play important roles in most fields. Researchers have achieved considerable progress with graphene. Chitosan (CS) is a natural polymer that has been studied intensively owing to its specific formation, high chemical resistance, and excellent physical properties. These outstanding properties have led to its universal use in applications such as textile fabrics, tissue engineering, medicine and health, coatings, and paints. By combining the advantages of GO and CS, different types of promising materials can be obtained. This review discusses the preparation of GO-CS fibers, hydrogel and aerogel, and the applications of GO-CS nanocomposites. In addition, directions for future research on graphene material composites are discussed.

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Section: Wet Spinningmentioning

confidence: 99%

A review: synthesis and applications of graphene/chitosan nanocomposites

Yuan¹,

Meng²,

Park³

2016

Carbon letters

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“…Yang's group demonstrated a facile synthesis route to create the N‐self‐doped graphene‐based hierarchical porous carbon aerogel. The resulting materials as the all solid‐state symmetric supercapacitor electrodes show a specific capacitance of ≈197 F g −1 at a current density of 0.2 A g −1 . Although many N‐doped porous carbon materials are prepared using these methods and used for electrode materials, the performances of EDLCs with pure N‐doped carbon nanomaterials are still unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

N,P Dual‐Doped Hierarchically Porous Carbon Derived from a Polyelectrolyte Complex as High‐Performance Electrodes for Supercapacitors

et al. 2019

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Both the surface composition and the pore texture of electrode materials have a significant effect on their electrochemical performances. Herein, a new type of nitrogen and phosphorus dual‐doped hierarchically porous carbon (NP‐HPC), fabricated by simultaneous pyrolysis and activation of the polyelectrolyte complex with chitosan and polyphosphoric acid as the precursor, is demonstrated. The NP‐HPC has a hierarchically interconnected porous structure, high surface area (2933 m2 g−1), and doping of heteroatoms. Due to its unique features, the optimal NP‐HPC‐800 demonstrates a high specific capacitance (289 F g−1 at 0.5 A g−1), excellent rate performance (238 F g−1 at 10 A g−1), and superior cycling stability (96% retention after 5000 cycles at 5 A g−1) in 6 mol L−1 of KOH. Furthermore, NP‐HPC‐800 shows an excellent energy density of 22.5 Wh kg−1 at a power density of 183.3 W kg−1. The low‐cost and facile fabrication process provides a feasible approach to prepare heteroatom‐doped carbon materials from a biomass precursor for energy‐related applications.

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“…Therefore, many polymers with nitrogen element were used as nitrogen-doped agent to fabricate the N-doped graphene aerogels. [49] Moreover, the controllability of the porous structure and the surface area of the N-doped graphene aerogel could make obvious influences on its electrochemical performance. [45,46] Because of good bio-compatibility and non-toxicity, chitosan has been widely used in the field of water purification and ion adsorption.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Nitrogen‐Doped Graphene Aerogels for Electrode Materials in Supercapacitors

et al. 2017

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Three-dimensional porous nitrogen-doped graphene aerogels (NGAs) were synthesized by using graphene oxide (GO) and chitosan (CS) via a self-assembly process by one-pot hydrothermal method. The morphology and structure of the as-prepared materials were characterized by means of scanning electron microscopy, transmission electron microscopy, X-ray diffraction, XPS spectroscopy, Raman spectroscopy, nitrogen adsorption/desorption measurement and Fourier transform infrared spectroscopy. The electrochemical performance of NGAs was studied by cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy measurements. The microstructure, surface area and capacitance of NGAs could be facilely controlled by adding different amounts of chitosan. The prepared NGA-4 showed a specific capacitance of 148.0 F/g at the discharge current density of 0.5 A/g and also retained 95.3% of the initial capacitance after 5000 cycles at the scan rate of 10 mV/s. It provided a possible way to obtain graphene based materials with high surface area and capacitance.

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Graphene-based nitrogen self-doped hierarchical porous carbon aerogels derived from chitosan for high performance supercapacitors

Cited by 575 publications

References 72 publications

A review: synthesis and applications of graphene/chitosan nanocomposites

A review: synthesis and applications of graphene/chitosan nanocomposites

N,P Dual‐Doped Hierarchically Porous Carbon Derived from a Polyelectrolyte Complex as High‐Performance Electrodes for Supercapacitors

Facile Synthesis of Nitrogen‐Doped Graphene Aerogels for Electrode Materials in Supercapacitors

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