scholarly journals Sustainable one-step strategy to highly graphitized capacitive carbons with hierarchical micro-meso-macro porosity

2022 ◽  
Author(s):  
Binbin Chang ◽  
Huili Liu ◽  
Suisui Su ◽  
Heng Wang ◽  
Miaomiao Wang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Pore Size ◽  
Surface Area ◽  
High Performance ◽  
Micropore Surface Area ◽  
One Step

Large micropore surface area, superior electrical conductivity and suitable pore size are simultaneously desired characteristics for high-performance capacitive carbons. However, these desired features tend to be mutually competing, and are...

scholarly journals Synthesis of a hierarchical nanoporous carbon material with controllable pore size and effective surface area for high-performance electrochemical capacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14516-14527 ◽  
Author(s):  
Bing Hu ◽  
Ling-Bin Kong ◽  
Long Kang ◽  
Kun Yan ◽  
Tong Zhang ◽  
...  
Keyword(s):  
Pore Size ◽  
Linear Relationship ◽  
Specific Capacitance ◽  
Surface Area ◽  
Carbon Material ◽  
High Performance ◽  
Electrode Materials ◽  
Effective Surface Area ◽  
Effective Surface ◽  
Nanoporous Carbon Material

There is an excellent linear relationship between E-SSA and specific capacitance of HNC-IPNs as electrode materials for EDLCs.

3D hollow cage copper cobalt sulfide derived from metal–organic frameworks for high-performance asymmetric supercapacitors

CrystEngComm ◽  
2021 ◽  
Author(s):  
Jiaqi Wang ◽  
Yiling Quan ◽  
Guoxiang Wang ◽  
Dazhi Wang ◽  
Jie Xiao ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
High Performance ◽  
Solvothermal Method ◽  
Metal Organic Frameworks ◽  
Cobalt Sulfide ◽  
Large Specific Surface Area ◽  
Asymmetric Supercapacitors ◽  
Metal Organic ◽  
One Step

Metal–organic frameworks (MOFs) attracted considerable attention through their large specific surface area and excellent adjustable voids. A one-step solvothermal method is proposed herein to fabricate the 3D hollow cage copper-cobalt...

scholarly journals Plasma-Assisted Three-Dimensional Lightscribe Graphene as High Performance Supercapacitors

2021 ◽  
Author(s):  
Naser Namdar ◽  
Foad Ghasemi ◽  
Zeinab Sanaee
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Energy Storage ◽  
Surface Area ◽  
High Performance ◽  
Sulfur Hexafluoride ◽  
Effective Surface Area ◽  
Effective Surface ◽  
Practical Applications ◽  
Sequential Processes

Abstract Graphene-based supercapacitors demonstrate extraordinary energy storage capacity due to their layered structure, large effective surface area, high electrical conductivity and acceptable chemical stability. Herein, reduced graphene oxide (rGO)-based supercapacitors were introduced in a simple, green, fast and inexpensive method. For this purpose, graphene oxide (GO) was synthesized by the modified Hummers’ method and then easily reduced to desired patterns of rGO using a commercial LightScribe DVD drive. In order to increase the effective surface area, as well as the electrical conductivity of rGO layers, oxygen/sulfur hexafluoride plasma was applied to the rGO followed by laser irradiation. By performing such sequential processes, an rGO-based supercapacitor was introduced with a capacitance of about 10.2 F/cm3, which had high stability for more than 1000 consecutive charge-discharge cycles. The fabrication steps of the electrodes were investigated by different analyses such as SEM, TEM, Raman, surface resistance and XPS measurements. Results show that these rGO-based electrodes fabricated by sequential processes are very interesting for practical applications of energy storage.

A one-step synthesis of porous V2O3@C hollow spheres as a high-performance anode for lithium-ion batteries

2018 ◽  
Vol 54 (53) ◽  
pp. 7346-7349 ◽  
Author(s):  
Jianbiao Wang ◽  
Zhenwei Liu ◽  
Wenjuan Yang ◽  
Lijing Han ◽  
Mingdeng Wei
Keyword(s):  
Specific Surface ◽  
Lithium Ion Batteries ◽  
Surface Area ◽  
High Performance ◽  
Hollow Spheres ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Large Specific Surface Area ◽  
High Reversible Capacity ◽  
One Step

V2O3@C hollow spheres with a large specific surface area exhibited high reversible capacity for LIBs.

Mordant inspired wet-spinning of graphene fibers for high performance flexible supercapacitors

2019 ◽  
Vol 7 (12) ◽  
pp. 6869-6876 ◽  
Author(s):  
Nanfei He ◽  
Weitao Shan ◽  
Julia Wang ◽  
Qin Pan ◽  
Jiangang Qu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Surface Area ◽  
High Performance ◽  
Large Surface Area ◽  
Wet Spinning ◽  
High Electrical Conductivity ◽  
Flexible Supercapacitors ◽  
Large Capacitance ◽  
Graphene Fibers

Al3+ coagulated wet-spun graphene fibers show a large surface area and high electrical conductivity, resulting in large capacitance.

Sustainable activated carbon fibers from liquefied wood with controllable porosity for high-performance supercapacitors

2014 ◽  
Vol 2 (30) ◽  
pp. 11706-11715 ◽  
Author(s):  
Zhi Jin ◽  
Xiaodong Yan ◽  
Yunhua Yu ◽  
Guangjie Zhao
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
Surface Area ◽  
Carbon Fibers ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Activated Carbon Fibers ◽  
Micropore Surface Area ◽  
Liquefied Wood

The combination of the high micropore surface area and the controlled mesopore size and mesopore/micropore ratio is responsible for high specific capacitance and excellent rate capability.

scholarly journals Plasma Surface Functionalization of Carbon Nanofibres with Silver, Palladium and Platinum Nanoparticles for Cost-Effective and High-Performance Supercapacitors

Micromachines ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 2 ◽  
Author(s):  
Zelun Li ◽  
Shaojun Qi ◽  
Yana Liang ◽  
Zhenxue Zhang ◽  
Xiaoying Li ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Specific Capacitance ◽  
Surface Area ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Low Cost ◽  
Cost Effective ◽  
Carbon Nanofibres ◽  
X Ray ◽  
Active Screen

Due to their relatively low cost, large surface area and good chemical and physical properties, carbon nanofibers (CNFs) are attractive for the fabrication of electrodes for supercapacitors (SCs). However, their relatively low electrical conductivity has impeded their practical application. To this end, a novel active-screen plasma activation and deposition technology has been developed to deposit silver, platinum and palladium nanoparticles on activated CNFs surfaces to increase their specific surface area and electrical conductivity, thus improving the specific capacitance. The functionalised CNFs were fully characterised using scanning electron microscope (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD) and their electrochemical properties were evaluated using cyclic voltammetry and electrochemical impedance spectroscopy. The results showed a significant improvement in specific capacitance, as well as electrochemical impedance over the untreated CNFs. The functionalisation of CNFs via environmental-friendly active-screen plasma technology provides a promising future for cost-effective supercapacitors with high power and energy density.

scholarly journals Polydopamine Doping and Pyrolysis of Cellulose Nanofiber Paper for Fabrication of Three-Dimensional Nanocarbon with Improved Yield and Capacitive Performances

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3249
Author(s):  
Luting Zhu ◽  
Kojiro Uetani ◽  
Masaya Nogi ◽  
Hirotaka Koga
Keyword(s):  
Electrical Conductivity ◽  
Surface Area ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Cellulose Nanofiber ◽  
Supercapacitor Electrode ◽  
Carbohydrate Polymer ◽  
Volume Retention

Biomass-derived three-dimensional (3D) porous nanocarbons have attracted much attention due to their high surface area, permeability, electrical conductivity, and renewability, which are beneficial for various electronic applications, including energy storage. Cellulose, the most abundant and renewable carbohydrate polymer on earth, is a promising precursor to fabricate 3D porous nanocarbons by pyrolysis. However, the pyrolysis of cellulosic materials inevitably causes drastic carbon loss and volume shrinkage. Thus, polydopamine doping prior to the pyrolysis of cellulose nanofiber paper is proposed to fabricate the 3D porous nanocarbons with improved yield and volume retention. Our results show that a small amount of polydopamine (4.3 wt%) improves carbon yield and volume retention after pyrolysis at 700 °C from 16.8 to 26.4% and 15.0 to 19.6%, respectively. The pyrolyzed polydopamine-doped cellulose nanofiber paper has a larger specific surface area and electrical conductivity than cellulose nanofiber paper that without polydopamine. Owing to these features, it also affords a good specific capacitance up to 200 F g−1 as a supercapacitor electrode, which is higher than the recently reported cellulose-derived nanocarbons. This method provides a pathway for the effective fabrication of high-performance cellulose-derived 3D porous nanocarbons.

One-step phosphating synthesis of CoP nanosheet arrays combined with Ni2P as a high-performance electrode for supercapacitors

Nanoscale ◽  
2020 ◽  
Vol 12 (40) ◽  
pp. 20710-20718 ◽  
Author(s):  
Tie Shu ◽  
He Gao ◽  
Qian Li ◽  
Fuxiang Wei ◽  
Yaojian Ren ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Transition Metal ◽  
High Performance ◽  
Metal Phosphide ◽  
Nanosheet Arrays ◽  
Excellent Candidate ◽  
One Step ◽  
High Theoretical Capacity ◽  
Transition Metal Phosphide

A transition metal phosphide is an excellent candidate for supercapacitors due to its superior electrical conductivity and high theoretical capacity.

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