Preparation of hierarchically porous carbon nanofoams for electrode materials of supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70297-70301 ◽  
Author(s):  
Yong Zhang ◽  
Youfu Wang ◽  
Aiguo Hu
Keyword(s):  
Specific Capacitance ◽  
Porous Carbon ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Core Shell ◽  
Hierarchically Porous

Hierarchically porous carbon nanofoams were prepared via the formation of core–shell organosilica nanoparticles and subsequent Friedel–Crafts chemistry. The specific capacitance of them as electrode materials reached 170 F g−1 in an aqueous electrolyte.

A novel eutectic solvent precursor for efficiently preparing N-doped hierarchically porous carbon nanosheets with unique surface functional groups and micro-pores towards dual-carbon lithium-ion capacitors

2021 ◽  
Author(s):  
Kaixiang Zou ◽  
Yuanfu Deng ◽  
Weijing Wu ◽  
Shiwei Zhang ◽  
Guohua Chen
Keyword(s):  
Functional Groups ◽  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Surface Functional Groups ◽  
Carbon Nanosheets ◽  
Hierarchically Porous ◽  
Li Ion ◽  
Unique Surface

High performance carbon-based materials are ideal electrode materials for Li-ion capacitors (LICs), but there are still many challenges such as the complicated preparation preocesses, high cost and low yield. Also,...

Synthesis and Electrochemical Performance of Porous Carbon/Carbon Electrode with Core/Shell Structure

2010 ◽  
Vol 123-125 ◽  
pp. 1099-1102
Author(s):  
Ki Seok Kim ◽  
Soo Jin Park
Keyword(s):  
Electrochemical Performance ◽  
Porous Carbon ◽  
Shell Structure ◽  
Electrode Materials ◽  
In Situ Polymerization ◽  
High Surface ◽  
Hollow Structure ◽  
Core Shell ◽  
Carbon Electrode ◽  
Core Shell Structure

Recently core/shell nanostructures including nanotubes, nanowires, and nanofibers have a considerable attension because multiple or enhanced functionality can be obtained by the synergistic effect of different materials in the formation of a core/shell structure. In this work, porous carbon/carbon core/shell carbon electrode (P-C/C-CE) composed of core graphene and disordered shells were prepared to obtain a new type of carbon electrode materials. The disordered carbon shells were prepared by coating of polyaniline onto the graphene by in-situ polymerization in the presence of nano-sized silica and subsequent carbonization at 850°C. After carbonization, P-C/C-CE showed the hollow structure and crystallinity. In addition, P-C/C-CE exhibited superior electrochemical performance compared to graphene and graphene/PANI composites, which was attributed to the high surface area of P-C/C-CE and the presence of nitrogen groups formed onto carbon electrode after the carbonization of shell polyaniline.

scholarly journals Supercapacitors with graphene coated paper electrodes

2012 ◽  
Vol 27 (2) ◽  
pp. 481-485 ◽  
Author(s):  
Britta Andres ◽  
Sven Forsberg ◽  
Ana Paola Vilches ◽  
Renyun Zhang ◽  
Magnus Hummelgård ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Gold Nanoparticle ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Minor Effect ◽  
Graphite Foil ◽  
Coated Paper ◽  
A Minor

Abstract Paper based supercapacitors are prepared by stacking a paper between two graphene electrodes and soaking these in an aqueous electrolyte. We demonstrate that supercapacitors can easily be manufactured by using proven paper technologies. Several different electrode materials were compared and two types of contacting material, silver and graphite foil were tested. The influence of the paper used as separator was also investigated. The supercapacitors with a graphene-gold nanoparticle composite as electrodes showed a specific capacitance of up to 100 F/g and an energy density of 1.27 Wh/kg. The energy density can further be increased by using other electrolytes. The silver contacts showed a pseudo capacitance, which the graphite contacts did not. The papers tested had a minor effect on the capacitance, but they have an influence on the weight and the volume of the supercapacitor.

Synthesis of wood derived nitrogen-doped porous carbon–polyaniline composites for supercapacitor electrode materials

RSC Advances ◽  
2015 ◽  
Vol 5 (39) ◽  
pp. 30943-30949 ◽  
Author(s):  
Shuai Yu ◽  
Duo Liu ◽  
Shuyan Zhao ◽  
Binfu Bao ◽  
Chunde Jin ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Porous Carbon ◽  
Electrode Materials ◽  
Supercapacitor Electrode ◽  
Nitrogen Doped ◽  
Similar Materials ◽  
Polyaniline Composites ◽  
Supercapacitor Electrode Materials

Wood derived carbon–polyaniline composites exhibit comparable specific capacitance (347 F g−1) and energy density (44.4 W h kg−1) to similar materials.

All-around coating of CoNi nanoalloy using a hierarchically porous carbon derived from bimetallic MOFs for highly efficient hydrolytic dehydrogenation of ammonia-borane

2020 ◽  
Vol 44 (7) ◽  
pp. 3021-3027 ◽  
Author(s):  
Min-Jie Chen ◽  
Dai-Xue Zhang ◽  
Dan Li ◽  
Shan-Chao Ke ◽  
Xiao-Chen Ma ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Porous Carbon ◽  
Ammonia Borane ◽  
Core Shell ◽  
Hierarchically Porous ◽  
Highly Efficient

In situ synthesis of core–shell carbon enclosed CoNi alloys achieves efficient heterogeneous catalysis.

Carbon Quantum Dots/Polyaniline Nanocomposite (S-CQD/PANI) for High Capacitive Asymmetric Supercapacitor Device

2020 ◽  
Vol 20 (6) ◽  
pp. 3785-3794 ◽  
Author(s):  
Manohar D. Mehare ◽  
Abhay D. Deshmukh ◽  
S. J. Dhoble
Keyword(s):  
Quantum Dots ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Carbon Quantum Dots ◽  
Electrode System ◽  
Potential Range ◽  
Asymmetric Supercapacitor ◽  
Supercapacitor Application ◽  
Excellent Stability

A sucrose derived carbon quantum dots/polyaniline (S-CQD/PANI) nanocomposite was synthesized as electrode materials by electrodeposition method to achieve excellent electrocapacitive performance for supercapacitor application. The morphology reveals that CQD were distributed uniformly over the surface of PANI. The highest specific capacitance obtained to be 1512.4 Fg−1 at current density 1 Ag−1 for S-CQD/PANI-25 composite in three electrode system with 1 M H2SO4 aqueous electrolyte within the potential range of −0.2 to 0.8 V. In addition asymmetric supercapacitor device was fabricated reveals highest specific capacitance of 295 Fg−1 at 1 Ag−1 with excellent stability over 1000 cycle at 3 Ag−1. Remarkably, the device delivers energy density of 40.86 Whkg−1 at power density 2000 Wkg−1.

scholarly journals Impact of Moisture Sorbed from Air by Activated Carbon Electrodes on their Capacitance in Aqueous Electrolyte of Supercapacitor

2015 ◽  
Vol 16 (3) ◽  
pp. 547-550
Author(s):  
D.G. Gromadskyi
Keyword(s):  
Cyclic Voltammetry ◽  
Activated Carbon ◽  
Impedance Spectroscopy ◽  
Specific Capacitance ◽  
Porous Carbon ◽  
Aqueous Electrolyte ◽  
Carbon Electrodes ◽  
Vacuum Drying ◽  
Porous Carbon Electrodes

Impact of moisture sorbed from air by porous carbon electrodes after vacuum drying on their specific capacitance in aqueous 1.0 M Na2SO4 solution was studied. It was shown by cyclic voltammetry and impedance spectroscopy that electrodes lose more than 20 % of the capacitance after such drying procedure and in order to recover it takes about 1 month.

N-Doped hierarchically porous carbon derived from heterogeneous core–shell ZIF-L(Zn)@ZIF-67 for supercapacitor application

2018 ◽  
Vol 42 (9) ◽  
pp. 6719-6726 ◽  
Author(s):  
Jingcheng Zhang ◽  
Yang Wang ◽  
Kesong Xiao ◽  
Sheng Cheng ◽  
Tianci Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Porous Carbon ◽  
Core Shell ◽  
Hierarchically Porous ◽  
Supercapacitor Application

Hierarchically porous N-C@GC/CNTs directly carbonized from heterogeneous core–shell ZIF-L(Zn)@ZIF-67 exhibit superior electrochemical performance.

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