The Synthesis of Nitrogen-Doped Mesoporous Carbon Spheres for Hydrogen Storage

2016 ◽  
Vol 852 ◽  
pp. 864-869 ◽  
Author(s):  
Zi Qiang Wang ◽  
Li Xian Sun ◽  
Fen Xu ◽  
Xiao Jun Peng
Keyword(s):  
Hydrogen Storage ◽  
Mesoporous Carbon ◽  
Hydrogen Adsorption ◽  
Activated Carbons ◽  
Phenol Formaldehyde ◽  
Carbon Sources ◽  
Soft Template ◽  
Carbon Spheres ◽  
High Nitrogen ◽  
Nitrogen Doped

The nitrogen-doped mesoporous carbon spheres have been synthesized via soft-template and hydrothermal synthetic strategies using phenol/formaldehyde resins as carbon sources and melamine as a nitrogen source. The obtained carbon spheres exhibit a spherical morphology with a size range of 3-5 μm, which possess the narrow microporosity (ca. 1.2 nm) and mesoporosity (ca. 4 nm), large surface area (560-1200 m2 g-1) and high nitrogen contents (up to 15.7 wt%). Due to the well-developed porous structure and high nitrogen content, the carbon spheres show high performance for hydrogen storage, and the hydrogen adsorption capacities are in the range of 140-185 cm3 g-1, which is better than that of most activated carbons. The incorporation of nitrogen into carbons is favored for hydrogen uptake in low pressure.

Rational design of high nitrogen-doped and core–shell/mesoporous carbon nanospheres with high rate capability and cycling longevity for pseudocapacitive sodium storage

2020 ◽  
Vol 8 (19) ◽  
pp. 9768-9775
Author(s):  
Jiayi Mao ◽  
Dechao Niu ◽  
Nan Jiang ◽  
Guangyu Jiang ◽  
Meiwan Chen ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Rational Design ◽  
Rate Capability ◽  
High Rate ◽  
Soft Template ◽  
Core Shell ◽  
High Nitrogen ◽  
Carbon Nanospheres ◽  
Nitrogen Doped

A facile soft-template strategy is developed to construct high-nitrogen-doped and core–shell/mesoporous carbon nanospheres for high-rate and long-term stable sodium-ion batteries.

scholarly journals High Capacity and Fast Kinetics of Potassium-Ion Batteries Boosted by Nitrogen-Doped Mesoporous Carbon Spheres

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jiefeng Zheng ◽  
Yuanji Wu ◽  
Yong Tong ◽  
Xi Liu ◽  
Yingjuan Sun ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Active Sites ◽  
Carbon Materials ◽  
Potassium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Carbon Spheres ◽  
Fast Kinetics ◽  
Nitrogen Doped ◽  
Economic Price

AbstractIn view of rich potassium resources and their working potential, potassium-ion batteries (PIBs) are deemed as next generation rechargeable batteries. Owing to carbon materials with the preponderance of durability and economic price, they are widely employed in PIBs anode materials. Currently, porosity design and heteroatom doping as efficacious improvement strategies have been applied to the structural design of carbon materials to improve their electrochemical performances. Herein, nitrogen-doped mesoporous carbon spheres (MCS) are synthesized by a facile hard template method. The MCS demonstrate larger interlayer spacing in a short range, high specific surface area, abundant mesoporous structures and active sites, enhancing K-ion migration and diffusion. Furthermore, we screen out the pyrolysis temperature of 900 °C and the pore diameter of 7 nm as optimized conditions for MCS to improve performances. In detail, the optimized MCS-7-900 electrode achieves high rate capacity (107.9 mAh g−1 at 5000 mA g−1) and stably brings about 3600 cycles at 1000 mA g−1. According to electrochemical kinetic analysis, the capacitive-controlled effects play dominant roles in total storage mechanism. Additionally, the full-cell equipped MCS-7-900 as anode is successfully constructed to evaluate the practicality of MCS.

scholarly journals Pinecone-Derived Activated Carbons as an Effective Medium for Hydrogen Storage

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2237
Author(s):  
Sara Stelitano ◽  
Giuseppe Conte ◽  
Alfonso Policicchio ◽  
Alfredo Aloise ◽  
Giovanni Desiderio ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Hydrogen Storage ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Hydrogen Adsorption ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Textural Properties ◽  
Biomass Waste ◽  
Wavelength Dispersive Spectrometry

Pinecones, a common biomass waste, has an interesting composition in terms of cellulose and lignine content that makes them excellent precursors in various activated carbon production processes. The synthesized, nanostructured, activated carbon materials show textural properties, a high specific surface area, and a large volume of micropores, which are all features that make them suitable for various applications ranging from the purification of water to energy storage. Amongst them, a very interesting application is hydrogen storage. For this purpose, activated carbon from pinecones were prepared using chemical activation with different KOH/precursor ratios, and their hydrogen adsorption capacity was evaluated at liquid nitrogen temperatures (77 K) at pressures of up to 80 bar using a Sievert’s type volumetric apparatus. Regarding the comprehensive characterization of the samples’ textural properties, the measurement of the surface area was carried out using the Brunauer–Emmett–Teller method, the chemical composition was investigated using wavelength-dispersive spectrometry, and the topography and long-range order was estimated using scanning electron microscopy and X-ray diffraction, respectively. The hydrogen adsorption properties of the activated carbon samples were measured and then fitted using the Langmuir/ Töth isotherm model to estimate the adsorption capacity at higher pressures. The results showed that chemical activation induced the formation of an optimal pore size distribution for hydrogen adsorption centered at about 0.5 nm and the proportion of micropore volume was higher than 50%, which resulted in an adsorption capacity of 5.5 wt% at 77 K and 80 bar; this was an increase of as much as 150% relative to the one predicted by the Chahine rule.

One-pot synthesis of nitrogen-doped ordered mesoporous carbon spheres for high-rate and long-cycle life supercapacitors

Carbon ◽  
2018 ◽  
Vol 127 ◽  
pp. 85-92 ◽  
Author(s):  
Jian-Gan Wang ◽  
Hongzhen Liu ◽  
Huanhuan Sun ◽  
Wei Hua ◽  
Huwei Wang ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
Cycle Life ◽  
High Rate ◽  
Carbon Spheres ◽  
One Pot ◽  
Nitrogen Doped ◽  
Long Cycle Life ◽  
One Pot Synthesis ◽  
Ordered Mesoporous

Synthesis of mesoporous carbon spheres via soft-template route for catalyst support in PEMFC cathode

Soft Matter ◽  
2021 ◽  
Author(s):  
Hassan Javed ◽  
Shubhashree Pani ◽  
Jithin Antony ◽  
Mariappan Sakthivel ◽  
Jean-Francois Drillet
Keyword(s):  
Mesoporous Carbon ◽  
Catalyst Support ◽  
Industrial Applications ◽  
Soft Template ◽  
Time Cost ◽  
Carbon Spheres ◽  
Pemfc Cathode

Synthesis of carbon spheres via soft-template route should be further improved for industrial applications especially in terms of time, cost and scalability. The present work reports on relative fast production...

Silica-Assisted Assembly for Synthesis of Nitrogen-Doped Hollow Mesoporous Carbon Spheres as Supercapacitors

2017 ◽  
Vol 164 (9) ◽  
pp. A1918-A1923 ◽  
Author(s):  
Yuying Wang ◽  
Juan Du ◽  
Hongliang Zhang ◽  
Lei Liu ◽  
Yifeng Yu ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Carbon Spheres ◽  
Nitrogen Doped
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