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 Self-Template Synthesis of Nitrogen-Doped Hollow Carbon Nanospheres with Rational Mesoporosity for Efficient Supercapacitors

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3619
Author(s):  
Xiang Zhao ◽  
Mu Zhang ◽  
Wei Pan ◽  
Rui Yang ◽  
Xudong Sun
Keyword(s):  
Rational Design ◽  
Electrode Materials ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Hierarchical Architecture ◽  
Formaldehyde Resin ◽  
Carbon Nanospheres ◽  
Nitrogen Doped ◽  
Symmetric Supercapacitor ◽  
Hollow Carbon

Rational design and economic fabrication are essential to develop carbonic electrode materials with optimized porosity for high-performance supercapacitors. Herein, nitrogen-doped hollow carbon nanospheres (NHCSs) derived from resorcinol and formaldehyde resin are successfully prepared via a self-template strategy. The porosity and heteroatoms in the carbon shell can be adjusted by purposefully introducing various dosages of ammonium ferric citrate (AFC). Under the optimum AFC dosage (30 mg), the as-prepared NHCS-30 possesses hierarchical architecture, high specific surface area up to 1987 m2·g−1, an ultrahigh mesopore proportion of 98%, and moderate contents of heteroatoms, and these features endow it with a high specific capacitance of 206.5 F·g−1 at 0.2 A·g−1, with a good rate capability of 125 F·g−1 at 20 A·g−1 as well as outstanding electrochemical stability after 5000 cycles in a 6 M KOH electrolyte. Furthermore, the assembled NHCS-30 based symmetric supercapacitor delivers an energy density of 14.1 W·h·kg−1 at a power density of 200 W·kg−1 in a 6 M KOH electrolyte. This work provides not only an appealing model to study the effect of structural and component change on capacitance, but also general guidance to expand functionality electrode materials by the self-template method.

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.

Controlled synthesis of N-doped carbon spheres with different morphologies for supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104642-104647 ◽  
Author(s):  
Zuosong Sun ◽  
Shaodian Shen ◽  
Limeng Ma ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Mesoporous Carbon ◽  
Core Shell ◽  
Controlled Synthesis ◽  
General Strategy ◽  
Carbon Spheres ◽  
Carbon Nanospheres ◽  
Nitrogen Doped

A facile and general strategy has been developed to synthesize nitrogen doped mesoporous carbon nanospheres, newly nitrogen doped lychee exocarp-like mesoporous carbon spheres and nitrogen doped core–shell mesoporous carbon spheres.

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.

Carbon-coated Na3V2(PO4)2F3 nanoparticles embedded in a mesoporous carbon matrix as a potential cathode material for sodium-ion batteries with superior rate capability and long-term cycle life

2015 ◽  
Vol 3 (43) ◽  
pp. 21478-21485 ◽  
Author(s):  
Qiang Liu ◽  
Dongxue Wang ◽  
Xu Yang ◽  
Nan Chen ◽  
Chunzhong Wang ◽  
...  
Keyword(s):  
Cathode Material ◽  
Mesoporous Carbon ◽  
Rate Capability ◽  
Carbon Matrix ◽  
Cycle Life ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Hrtem Image ◽  
Carbon Coated

The HRTEM image and long-term cycle life with capacity retentions of 70% and 50% over 1000 and 3000 cycles at 10C and 30C rates, respectively.

Rational design of MnCo2O4@NC@MnO2 three-layered core–shell octahedron for high-rate and long-life lithium storage

2018 ◽  
Vol 47 (41) ◽  
pp. 14540-14548 ◽  
Author(s):  
Peng Huang ◽  
Ming Zhao ◽  
Bo Jin ◽  
Huan Li ◽  
Zhi Zhu ◽  
...  
Keyword(s):  
Energy Demand ◽  
Rational Design ◽  
Rapid Development ◽  
Lithium Ion ◽  
High Rate ◽  
Core Shell ◽  
Lithium Storage ◽  
Fossil Energy ◽  
Long Life ◽  
Current Energy

With the depletion of fossil energy and rapid development of electronic equipment, the commercial lithium-ion batteries (LIBs) do not meet the current energy demand.

scholarly journals Moving to Aqueous Binder: A Valid Approach to Achieving High-Rate Capability and Long-Term Durability for Sodium-Ion Battery

2018 ◽  
Vol 5 (4) ◽  
pp. 1700768 ◽  
Author(s):  
Jing Zhao ◽  
Xu Yang ◽  
Ye Yao ◽  
Yu Gao ◽  
Yongming Sui ◽  
...  
Keyword(s):  
Rate Capability ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Battery ◽  
High Rate Capability ◽  
Aqueous Binder
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