scholarly journals Construction of S-doped hierarchical porous carbons by acid-free treatment strategy for supercapacitors

2021 ◽  
Vol 228 ◽  
pp. 01007
Author(s):  
Lei Yang ◽  
BiYu Jin ◽  
Hong Qiang Li ◽  
Ting Ting Wu ◽  
Xiao Jun He
Keyword(s):  
Electrode Materials ◽  
Coal Tar ◽  
High Specific Capacitance ◽  
Porous Carbons ◽  
Energy Storage Devices ◽  
Supercapacitor Electrode ◽  
Alternative Technologies ◽  
Hierarchical Pores ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons

The pollution from acid treatment process in the preparation process of hierarchical porous carbons is a substantial challenge for industrial application of supercapacitors (SCs), which necessitates the development of green alternative technologies. In this work, S-doped hierarchical porous carbons (S-HPCs) are prepared from cheap coal tar pitch by a less harmful in situ KHCO3 activation strategy. The sample obtained at 800°C (S-HPC800) possesses 3D framework structure with hierarchical pores, large specific surface area (1485 m2 g-1) and O, S-containing functional groups. Due to these synergistic characteristics, SHPC800 as supercapacitor electrode exhibits high specific capacitance of 246 F g-1 at 0.1 A g-1 with a capacitance retention of 68.3% at 40 A g-1 and excellent cycle stability with 96.7% capacitance retention after 10, 000 charge-discharge cycles. This work provides an environmentally friendly approach to prepare advanced carbon-based electrode materials from industrial by-products for energy storage devices.

scholarly journals Hierarchical porous carbons from carboxylated coal-tar pitch functional poly(acrylic acid) hydrogel networks for supercapacitor electrodes

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 1095-1103
Author(s):  
Haiyang Wang ◽  
Chuan Zhou ◽  
Hongzhe Zhu ◽  
Yixuan Li ◽  
Shoukai Wang ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Specific Capacitance ◽  
Coal Tar ◽  
High Specific Capacitance ◽  
Coal Tar Pitch ◽  
Porous Carbons ◽  
Supercapacitor Electrode ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Poly Acrylic Acid

As a supercapacitor electrode exhibit a high specific capacitance of 292 F g−1 at 1.0 A g−1.

Cation exchanged MOF-derived nitrogen-doped porous carbons for CO2capture and supercapacitor electrode materials

2017 ◽  
Vol 5 (20) ◽  
pp. 9544-9552 ◽  
Author(s):  
Ying Pan ◽  
Yuxin Zhao ◽  
Shanjun Mu ◽  
Yu Wang ◽  
Chunming Jiang ◽  
...  
Keyword(s):  
Active Site ◽  
Electrode Materials ◽  
Porous Carbons ◽  
Supercapacitor Electrode ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Supercapacitor Electrode Materials

N-Doped hierarchical porous carbons with enhanced microporosity were prepared byin situintroduction of active site K+into MOF precursors.

scholarly journals Mechanochemistry-assisted synthesis of hierarchical porous carbons applied as supercapacitors

2017 ◽  
Vol 13 ◽  
pp. 1332-1341 ◽  
Author(s):  
Desirée Leistenschneider ◽  
Nicolas Jäckel ◽  
Felix Hippauf ◽  
Volker Presser ◽  
Lars Borchardt
Keyword(s):  
Electrode Materials ◽  
Liquid Electrolyte ◽  
High Specific Surface Area ◽  
Mechanochemical Reaction ◽  
Porous Carbons ◽  
Ionic Liquid Electrolyte ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Double Layer Capacitors ◽  
Solvent Free Synthesis

A solvent-free synthesis of hierarchical porous carbons is conducted by a facile and fast mechanochemical reaction in a ball mill. By means of a mechanochemical ball-milling approach, we obtained titanium(IV) citrate-based polymers, which have been processed via high temperature chlorine treatment to hierarchical porous carbons with a high specific surface area of up to 1814 m2 g−1 and well-defined pore structures. The carbons are applied as electrode materials in electric double-layer capacitors showing high specific capacitances with 98 F g−1 in organic and 138 F g−1 in an ionic liquid electrolyte as well as good rate capabilities, maintaining 87% of the initial capacitance with 1 M TEA-BF4 in acetonitrile (ACN) and 81% at 10 A g−1 in EMIM-BF4.

Fabrication of nitrogen-doped hierarchical porous carbons from Sargassum as advanced electrode materials for supercapacitors

2021 ◽  
Author(s):  
Feiqiang Guo ◽  
Yinbo Zhan ◽  
Xiaopeng Jia ◽  
Huiming Zhou ◽  
Shuang Liang ◽  
...  
Keyword(s):  
High Performance ◽  
Nitrogen Doping ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Koh Activation ◽  
Porous Carbons ◽  
Nitrogen Doped ◽  
Novel Approach ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons

Using Sargassum as the precursor, a novel approach was developed to synthesize three-dimensional porous carbons as high-performance electrode materials for supercapacitors via KOH activation and subsequent nitrogen-doping employing melamine as...

Template-free preparation of layer-stacked hierarchical porous carbons from coal tar pitch for high performance all-solid-state supercapacitors

2017 ◽  
Vol 5 (30) ◽  
pp. 15869-15878 ◽  
Author(s):  
Taotao Guan ◽  
Kaixi Li ◽  
Jianghong Zhao ◽  
Rijie Zhao ◽  
Guoli Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
High Performance ◽  
Coal Tar ◽  
Coal Tar Pitch ◽  
Porous Carbons ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Template Free

Template-free preparation of layer-stacked hierarchical porous carbons from cheap pitch precursors for high-performance all-solid-state supercapacitors.

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