Fabrication of hierarchical porous hollow carbon spheres with few-layer graphene framework and high electrochemical activity for supercapacitor

2018 ◽  
Vol 443 ◽  
pp. 367-373 ◽  
Author(s):  
Jing Chen ◽  
Min Hong ◽  
Jiafu Chen ◽  
Tianzhao Hu ◽  
Qun Xu
Keyword(s):  
Electrochemical Activity ◽  
Carbon Spheres ◽  
Layer Graphene ◽  
Hierarchical Porous ◽  
Hollow Carbon ◽  
Few Layer Graphene ◽  
Hollow Carbon Spheres

N-doped hierarchical porous hollow carbon spheres with multi-cavities for high performance Na-ion storage

2021 ◽  
Vol 506 ◽  
pp. 230170
Author(s):  
Lantao Liu ◽  
Xiangyu Sun ◽  
Yue Dong ◽  
Dengke Wang ◽  
Zheng Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Spheres ◽  
Hierarchical Porous ◽  
Ion Storage ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

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.

Kinetics Enhanced Nitrogen‐Doped Hierarchical Porous Hollow Carbon Spheres Boosting Advanced Potassium‐Ion Hybrid Capacitors

2019 ◽  
Vol 29 (32) ◽  
pp. 1903496 ◽  
Author(s):  
Daping Qiu ◽  
Jingyu Guan ◽  
Min Li ◽  
Cuihua Kang ◽  
Jinying Wei ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Hybrid Capacitors

High-frequency fabrication of discrete and dispersible hollow carbon spheres with hierarchical porous shells by using secondary-crosslinking pyrolysis

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16141-16149 ◽  
Author(s):  
Min Hong ◽  
Jiafu Chen ◽  
Minxin Zhang ◽  
Xin Huang ◽  
Qun Xu
Keyword(s):  
Specific Capacitance ◽  
High Frequency ◽  
High Specific Capacitance ◽  
Carbon Spheres ◽  
Porous Shell ◽  
Hierarchical Porous ◽  
Discrete Uniform ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Discrete, uniform HCSs with hierarchical porous shell are fabricated by “secondary-crosslinking pyrolysis”, showing high specific capacitance of 192 F g−1.

Homologous Hierarchical Porous Hollow Carbon Spheres Anode and Bowls Cathode Enabling High-Energy Sodium-Ion Hybrid Capacitors

2018 ◽  
Vol 10 (51) ◽  
pp. 44483-44493 ◽  
Author(s):  
Daping Qiu ◽  
Ang Gao ◽  
Zhenyu Xie ◽  
Lun Zheng ◽  
Cuihua Kang ◽  
...  
Keyword(s):  
High Energy ◽  
Sodium Ion ◽  
Carbon Spheres ◽  
Hierarchical Porous ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Hybrid Capacitors

Enhanced catalytic activity of low-Pt content nanocatalysts supported on hollow carbon spheres for the ORR in alkaline media

MRS Advances ◽  
2020 ◽  
Vol 5 (57-58) ◽  
pp. 2961-2972
Author(s):  
P.C. Meléndez-González ◽  
E. Garza-Duran ◽  
J.C. Martínez-Loyola ◽  
P. Quintana-Owen ◽  
I.L. Alonso-Lemus ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Anion Exchange ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Average Particle ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

In this work, low-Pt content nanocatalysts (≈ 5 wt. %) supported on Hollow Carbon Spheres (HCS) were synthesized by two routes: i) colloidal conventional polyol, and ii) surfactant-free Bromide Anion Exchange (BAE). The nanocatalysts were labelled as Pt/HCS-P and Pt/HCS-B for polyol and BAE, respectively. The physicochemical characterization of the nanocatalysts showed that by following both methods, a good control of chemical composition was achieved, obtaining in addition well dispersed nanoparticles of less than 3 nm TEM average particle size (d) on the HCS. Pt/HCS-B contained more Pt0 species than Pt/HCS-P, an effect of the synthesis method. In addition, the structure of the HCS remains more ordered after BAE synthesis, compared to polyol. Regarding the catalytic activity for the Oxygen Reduction Reaction (ORR) in 0.5 M KOH, Pt/HCS-P and Pt/HCS-B showed a similar performance in terms of current density (j) at 0.9 V vs. RHE than the benchmark commercial 20 wt. % Pt/C. However, Pt/HCS-P and Pt/HCS-B demonstrated a 6 and 5-fold increase in mass catalytic activity compared to Pt/C, respectively. A positive effect of the high specific surface area of the HCS and its interactions with metal nanoparticles and electrolyte, which promoted the mass transfer, increased the performance of Pt/HCS-P and Pt/HCS-B. The high catalytic activity showed by Pt/HCS-B and Pt/HCS-P for the ORR, even with a low-Pt content, make them promising cathode nanocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC).

Recent progress on the design of hollow carbon spheres to host sulfur in room-temperature sodium–sulfur batteries

2020 ◽  
Vol 35 (6) ◽  
pp. 630-645
Author(s):  
Jia-ying Yang ◽  
Hao-jie Han ◽  
Hlib Repich ◽  
Ri-cheng Zhi ◽  
Chang-zhen Qu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Recent Progress ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Sodium Sulfur ◽  
Hollow Carbon Spheres
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