scholarly journals Hierarchical S-doped porous carbon derived from by-product lignin for high-performance supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (20) ◽  
pp. 12089-12097 ◽  
Author(s):  
Jingyang Tian ◽  
Zhangming Liu ◽  
Zhenghui Li ◽  
Wenguang Wang ◽  
Haiyan Zhang
Keyword(s):  
Specific Capacitance ◽  
Porous Carbon ◽  
High Performance ◽  
High Specific Capacitance ◽  
Rate Performance

The S-PC-L-900 exhibits a high specific capacitance and excellent rate performance.

Composites of hierarchical metal–organic framework derived nitrogen-doped porous carbon and interpenetrating 3D hollow carbon spheres from lotus pollen for high-performance supercapacitors

2017 ◽  
Vol 41 (21) ◽  
pp. 12835-12842 ◽  
Author(s):  
Lijun Xin ◽  
Rongrong Chen ◽  
Qi Liu ◽  
Jingyuan Liu ◽  
Zhanshuang Li ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Porous Carbon ◽  
High Performance ◽  
Metal Organic Framework ◽  
High Specific Capacitance ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Metal Organic ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Nitrogen-doped porous carbon prepared via facile carbonization which displays high specific capacitance, is an excellent potential material for supercapacitors.

Copolymer derived micro/meso-porous carbon nanofibers with vacancy-type defects for high-performance supercapacitors

2020 ◽  
Vol 8 (5) ◽  
pp. 2463-2471 ◽  
Author(s):  
Jiye Li ◽  
Weimiao Zhang ◽  
Xu Zhang ◽  
Liyao Huo ◽  
Jiayi Liang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Carbon Nanofibers ◽  
Electrode Material ◽  
Porous Carbon ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
Excellent Cycling Stability

Micro/meso-porous carbon nanofibers have been successfully prepared and directly adopted as a supercapacitor electrode material with high specific capacitance, area normalized capacitance and excellent cycling stability.

scholarly journals A green approach to prepare hierarchical porous carbon nanofibers from coal for high-performance supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 6184-6192 ◽  
Author(s):  
Fenglian Tong ◽  
Wei Jia ◽  
Yanliang Pan ◽  
Jixi Guo ◽  
Lili Ding ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Carbon Nanofibers ◽  
Porous Carbon ◽  
High Performance ◽  
High Specific Capacitance ◽  
Hierarchical Porous Carbon ◽  
Green Method ◽  
Long Cycle Life ◽  
Green Approach ◽  
Hierarchical Porous

A green method is designed to obtain hierarchical porous carbon nanofibers from coal for supercapacitor electrodes with high specific capacitance and long cycle life.

One-step synthesis of polyhydroquinone–graphene hydrogel composites for high performance supercapacitors

2015 ◽  
Vol 3 (31) ◽  
pp. 16033-16039 ◽  
Author(s):  
Libin Chen ◽  
Jifeng Wu ◽  
Aijuan Zhang ◽  
Anan Zhou ◽  
Zhifeng Huang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Rate Performance ◽  
One Step ◽  
Hydrogel Composites

Polyhydroquinone–graphene hydrogel composites were prepared via a one-step reaction, and showed high specific capacitance and rate performance as electrode materials for supercapacitors.

scholarly journals Fabrication of Hierarchical NiMoO4/NiMoO4 Nanoflowers on Highly Conductive Flexible Nickel Foam Substrate as a Capacitive Electrode Material for Supercapacitors with Enhanced Electrochemical Performance

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1143 ◽  
Author(s):  
Anil Yedluri ◽  
Tarugu Anitha ◽  
Hee-Je Kim
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrode Material ◽  
High Performance ◽  
Nickel Foam ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Charge Discharge

Hierarchical NiMoO4/NiMoO4 nanoflowers were fabricated on highly conductive flexible nickel foam (NF) substrates using a facile hydrothermal method to achieve rapid charge-discharge ability, high energy density, long cycling lifespan, and higher flexibility for high-performance supercapacitor electrode materials. The synthesized composite electrode material, NF/NiMoO4/NiMoO4 with a nanoball-like NF/NiMoO4 structure on a NiMoO4 surface over a NF substrate, formed a three-dimensional interconnected porous network for high-performance electrodes. The novel NF/NiMoO4/NiMoO4 nanoflowers not only enhanced the large surface area and increased the electrochemical activity, but also provided an enhanced rapid ion diffusion path and reduced the charge transfer resistance of the entire electrode effectively. The NF/NiMoO4/NiMoO4 composite exhibited significantly improved supercapacitor performance in terms of a sustained cycling life, high specific capacitance, rapid charge-discharge capability, high energy density, and good rate capability. Electrochemical analysis of the NF/NiMoO4/NiMoO4 nanoflowers fabricated on the NF substrate revealed ultra-high electrochemical performance with a high specific capacitance of 2121 F g−1 at 12 mA g−1 in a 3 M KOH electrolyte and 98.7% capacitance retention after 3000 cycles at 14 mA g−1. This performance was superior to the NF/NiMoO4 nanoball electrode (1672 F g−1 at 12 mA g−1 and capacitance retention 93.4% cycles). Most importantly, the SC (NF/NiMoO4/NiMoO4) device displayed a maximum energy density of 47.13 W h kg−1, which was significantly higher than that of NF/NiMoO4 (37.1 W h kg−1). Overall, the NF/NiMoO4/NiMoO4 composite is a suitable material for supercapacitor applications.

scholarly journals Facile fabrication of hierarchical porous carbon for a high-performance electrochemical capacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46329-46335 ◽  
Author(s):  
Guixiang Du ◽  
Qiuxiao Bian ◽  
Jingbo Zhang ◽  
Xinhui Yang
Keyword(s):  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
Electrochemical Capacitor ◽  
High Specific Capacitance ◽  
Cycling Performance ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Facile Fabrication ◽  
Rapid Pyrolysis

A facile and rapid pyrolysis method is developed for the synthesis of 3D hierarchical porous carbon, which exhibits a high specific capacitance, good rate capability and good cycling performance.

One-step Synthesis of O-self-doped Honeycomb-like Hierachically Porous Carbons for Supercapacitors

2021 ◽  
pp. 1-19
Author(s):  
Shiying Lin ◽  
Lanlan Mo ◽  
Feijun Wang
Keyword(s):  
Electrode Material ◽  
Porous Carbon ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Electrode System ◽  
Porous Carbon Material ◽  
Hierarchical Porous ◽  
One Step ◽  
Porous Carbon Electrode

Abstract A facile and environmentally friendly approach to produce self-doped hierachically porous carbon as electrode material for high-performance supercapacitor was demonstrated. 3D honeycomb-like hierarchically porous carbon was successfully obtained by one-step carbonization and activation of sodium carboxymethyl cellulose (CMC) via K2CO3. With the optimized temperature of carbonization and activation, the porous carbon material achieved well-shaped hierarchically pores (micro-, meso and macropores) like a honeycomb, ultrahigh specific surface area (1666 m2·g-1), as well as highly O-self-doping (3.6 at.%), endowing an excellent electrochemical properties for the electrode in three-electrode system. The porous carbon electrode material delivered a high specific capacitance of 300.8 F·g-1 at 1 A·g-1, an eminent rate capability of 228.4 F·g-1 at the current density up to 20 A·g-1 and outstanding cycle stability of 94.3% retention after 10000 cycles. Therefore, the CMC derived hierarchical porous carbon activated by K2CO3 would have promising foreground in application of supercapacitors.

Manganese silicate drapes as a novel electrode material for supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105771-105779 ◽  
Author(s):  
Hong-Yan Wang ◽  
Yue-Ya Wang ◽  
Xue Bai ◽  
Huan Yang ◽  
Jian-Ping Han ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Electrode Material ◽  
High Specific Capacitance ◽  
Rate Performance ◽  
Hydrothermal Time ◽  
Manganese Silicate

Manganese silicate drapes (hydrothermal time of 3 h) exhibit high specific capacitance and excellent rate performance.

scholarly journals Atomic Modulation of 3D Conductive Frameworks Boost Performance of MnO2 for Coaxial Fiber-Shaped Supercapacitors

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiaona Wang ◽  
Zhenyu Zhou ◽  
Zhijian Sun ◽  
Jinho Hah ◽  
Yagang Yao ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Superior Performance ◽  
High Mass ◽  
Mass Loading ◽  
Energy Storage Devices ◽  
Free Standing ◽  
Cell Potential

Abstract Coaxial fiber-shaped supercapacitors are a promising class of energy storage devices requiring high performance for flexible and miniature electronic devices. Yet, they are still struggling from inferior energy density, which comes from the limited choices in materials and structure used. Here, Zn-doped CuO nanowires were designed as 3D framework for aligned distributing high mass loading of MnO2 nanosheets. Zn could be introduced into the CuO crystal lattice to tune the covalency character and thus improve charge transport. The Zn–CuO@MnO2 as positive electrode obtained superior performance without sacrificing its areal and gravimetric capacitances with the increasing of mass loading of MnO2 due to 3D Zn–CuO framework enabling efficient electron transport. A novel category of free-standing asymmetric coaxial fiber-shaped supercapacitor based on Zn0.11CuO@MnO2 core electrode possesses superior specific capacitance and enhanced cell potential window. This asymmetric coaxial structure provides superior performance including higher capacity and better stability under deformation because of sufficient contact between the electrodes and electrolyte. Based on these advantages, the as-prepared asymmetric coaxial fiber-shaped supercapacitor exhibits a high specific capacitance of 296.6 mF cm−2 and energy density of 133.47 μWh cm−2. In addition, its capacitance retention reaches 76.57% after bending 10,000 times, which demonstrates as-prepared device’s excellent flexibility and long-term cycling stability.

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