Three-dimensional nitrogen and phosphorus co-doped carbon quantum dots/reduced graphene oxide composite aerogels with a hierarchical porous structure as superior electrode materials for supercapacitors

2019 ◽  
Vol 7 (46) ◽  
pp. 26311-26325 ◽  
Author(s):  
Jingying Li ◽  
Xiaoru Yun ◽  
Zhongliang Hu ◽  
Liujiang Xi ◽  
Na Li ◽  
...  
Keyword(s):  
Porous Structure ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Carbon Quantum Dots ◽  
Hierarchical Porous Structure ◽  
Nitrogen And Phosphorus ◽  
Composite Aerogel ◽  
Reduced Graphene ◽  
Hierarchical Porous ◽  
Composite Aerogels

A novel 3D N, P-CQDs/rGO composite aerogel with a hierarchical porous structure is prepared, and excellent supercapacitive properties are achieved.

Porous nitrogen-doped hollow carbon spheres derived from polyaniline for high performance supercapacitors

2014 ◽  
Vol 2 (15) ◽  
pp. 5352-5357 ◽  
Author(s):  
Jinpeng Han ◽  
Guiyin Xu ◽  
Bing Ding ◽  
Jin Pan ◽  
Hui Dou ◽  
...  
Keyword(s):  
Porous Structure ◽  
High Performance ◽  
Nitrogen Doping ◽  
Electrode Materials ◽  
Carbon Spheres ◽  
Hierarchical Porous Structure ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

The porous nitrogen-doped hollow carbon spheres derived from polyaniline are promising electrode materials for high performance supercapacitors due to their hierarchical porous structure and nitrogen-doping.

scholarly journals Ultra-Sensitive Piezo-Resistive Sensors Constructed with Reduced Graphene Oxide/Polyolefin Elastomer (RGO/POE) Nanofiber Aerogels

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1883 ◽  
Author(s):  
Weibing Zhong ◽  
Haiqing Jiang ◽  
Liyan Yang ◽  
Ashish Yadav ◽  
Xincheng Ding ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Three Dimensional ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Working Pressure ◽  
Nanofiber Composite ◽  
Composite Aerogel ◽  
Polyolefin Elastomer ◽  
Reduced Graphene ◽  
Composite Aerogels

Flexible wearable pressure sensors have received extensive attention in recent years because of the promising application potentials in health management, humanoid robots, and human machine interfaces. Among the many sensory performances, the high sensitivity is an essential requirement for the practical use of flexible sensors. Therefore, numerous research studies are devoted to improving the sensitivity of the flexible pressure sensors. The fiber assemblies are recognized as an ideal substrate for a highly sensitive piezoresistive sensor because its three-dimensional porous structure can be easily compressed and can provide high interconnection possibilities of the conductive component. Moreover, it is expected to achieve high sensitivity by raising the porosity of the fiber assemblies. In this paper, the three-dimensional reduced graphene oxide/polyolefin elastomer (RGO/POE) nanofiber composite aerogels were prepared by chemical reducing the graphene oxide (GO)/POE nanofiber composite aerogels, which were obtained by freeze drying the mixture of the GO aqueous solution and the POE nanofiber suspension. It was found that the volumetric shrinkage of thermoplastic POE nanofibers during the reduction process enhanced the compression mechanical strength of the composite aerogel, while decreasing its sensitivity. Therefore, the composite aerogels with varying POE nanofiber usage were prepared to balance the sensitivity and working pressure range. The results indicated that the composite aerogel with POE nanofiber/RGO proportion of 3:3 was the optimal sample, which exhibits high sensitivity (ca. 223 kPa−1) and working pressure ranging from 0 to 17.7 kPa. In addition, the composite aerogel showed strong stability when it is either compressed with different frequencies or reversibly compressed and released 5000 times.

A metal-catalyst free, flexible and free-standing chitosan/vacuum-stripped graphene/polypyrrole three dimensional electrode interface for high performance dopamine sensing

2014 ◽  
Vol 2 (17) ◽  
pp. 2478-2482 ◽  
Author(s):  
Jing Liu ◽  
Ziming He ◽  
Jingwen Xue ◽  
Timothy Thatt Yang Tan
Keyword(s):  
Porous Structure ◽  
High Performance ◽  
Three Dimensional ◽  
Metal Catalyst ◽  
Hierarchical Porous Structure ◽  
Free Standing ◽  
Catalyst Free ◽  
Hierarchical Porous ◽  
Electrode Interface

A free-standing chitosan/vacuum stripped graphene/polypyrrole scaffold with a hierarchical porous structure was demonstrated as a high performance dopamine sensing electrode.

scholarly journals Hazardous Petroleum Sludge-Derived Nitrogen and Oxygen Co-Doped Carbon Material with Hierarchical Porous Structure for High-Performance All-Solid-State Supercapacitors

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2477
Author(s):  
Xiaoyu Li ◽  
Mingyang Zhang ◽  
Zhuowei Tan ◽  
Zhiqiang Gong ◽  
Peikun Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Porous Structure ◽  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Hierarchical Porous Structure ◽  
Petroleum Sludge ◽  
Synthesis Strategy ◽  
Hierarchical Porous ◽  
Co Doped

Rational design and sustainable preparation of high-performance carbonaceous electrode materials are important to the practical application of supercapacitors. In this work, a cost-effective synthesis strategy for nitrogen and oxygen co-doped porous carbon (NOC) from petroleum sludge waste was developed. The hierarchical porous structure and ultra-high surface area (2514.7 m2 g−1) of NOC electrode materials could provide an efficient transport path and capacitance active site for electrolyte ions. The uniform co-doping of N and O heteroatoms brought enhanced wettability, electrical conductivity and probably additional pseudo-capacitance. The as-obtained NOC electrodes exhibited a high specific capacitance (441.2 F g−1 at 0.5 A g−1), outstanding rate capability, and cycling performance with inconspicuous capacitance loss after 10,000 cycles. Further, the assembled all-solid-state MnO2/NOC asymmetrical supercapacitor device (ASC) could deliver an excellent capacitance of 119.3 F g−1 at 0.2 A g−1 under a wide potential operation window of 0–1.8 V with flexible mechanical stability. This ASC device yielded a superior energy density of 53.7 W h kg−1 at a power density of 180 W kg−1 and a reasonable cycling life. Overall, this sustainable, low-cost and waste-derived porous carbon electrode material might be widely used in the field of energy storage, now and into the foreseeable future.

A hierarchical porous graphene/nickel anode that simultaneously boosts the bio- and electro-catalysis for high-performance microbial fuel cells

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 21788-21793 ◽  
Author(s):  
Yan Qiao ◽  
Xiao-Shuai Wu ◽  
Cai-Xia Ma ◽  
Hong He ◽  
Chang Ming Li
Keyword(s):  
Fuel Cells ◽  
Porous Structure ◽  
Microbial Fuel Cells ◽  
High Performance ◽  
Composite Electrode ◽  
Three Dimensional ◽  
Hierarchical Porous Structure ◽  
Porous Graphene ◽  
Hierarchical Porous ◽  
Electro Catalysis

A three-dimensional graphene/nickel composite electrode with a hierarchical porous structure is developed to simultaneously boost the bio- and electro-catalysis for high-performance microbial fuel cells.

A novel fabrication approach for three-dimensional hierarchical porous metal oxide/carbon nanocomposites for enhanced solar photocatalytic performance

2017 ◽  
Vol 7 (9) ◽  
pp. 1965-1970 ◽  
Author(s):  
Huan Liu ◽  
Xuan Liu ◽  
Shanli Mu ◽  
Shuang Wang ◽  
Shulan Wang ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Porous Structure ◽  
Photocatalytic Performance ◽  
Three Dimensional ◽  
Porous Metal ◽  
Hierarchical Porous Structure ◽  
Carbon Nanocomposites ◽  
Novel Approach ◽  
Hierarchical Porous

A novel approach for the fabrication of metal oxide/C composites with a hierarchical porous structure is proposed.

Construction of strawberry-like Ni3S2@Co9S8 heteronanoparticle-embedded biomass-derived 3D N-doped hierarchical porous carbon for ultrahigh energy density supercapacitors

2019 ◽  
Vol 7 (29) ◽  
pp. 17345-17356 ◽  
Author(s):  
Shifu Wang ◽  
Zuoyi Xiao ◽  
Shangru Zhai ◽  
Haisong Wang ◽  
Weijie Cai ◽  
...  
Keyword(s):  
Energy Density ◽  
Porous Structure ◽  
Porous Carbon ◽  
Electrode Materials ◽  
High Surface ◽  
High Surface Area ◽  
Ultrahigh Energy ◽  
Hierarchical Porous Structure ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous

The design of advanced supercapacitors requires electrode materials that combine high surface area with a developed hierarchical porous structure to facilitate ion transport and electrolyte permeability.

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