scholarly journals Hierarchical NiS/N-doped carbon composite hollow spheres with excellent supercapacitor performance

2017 ◽  
Vol 5 (40) ◽  
pp. 21257-21265 ◽  
Author(s):  
Tao Liu ◽  
Chuanjia Jiang ◽  
Bei Cheng ◽  
Wei You ◽  
Jiaguo Yu
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Hollow Spheres ◽  
Carbon Composite ◽  
Carbon Spheres ◽  
Excellent Electrochemical Performance ◽  
Supercapacitor Performance ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

The synthesized NiS nanosheets anchored on N-doped hollow carbon spheres (NHCSs) exhibit excellent electrochemical performance as electrode materials for supercapacitors.

Encapsulation of selenium in porous hollow carbon spheres for advanced lithium–selenium batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (74) ◽  
pp. 39312-39315 ◽  
Author(s):  
Yanqing Lai ◽  
Fuhua Yang ◽  
Zhian Zhang ◽  
Shaofeng Jiang ◽  
Jie Li
Keyword(s):  
Electrochemical Performance ◽  
Template Method ◽  
Carbon Spheres ◽  
Excellent Electrochemical Performance ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Porous hollow carbon spheres (PHCSs) were synthesized by a simple template method. After selenium encapsulation, the Se/C composite showed excellent electrochemical performance, ascribed to the good electronic and porous hollow-structured properties of PHCSs.

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.

Buckled Amorphous Hollow Carbon Spheres: Facile Fabrication, Buckling Process, and Applications as Electrode Materials for Supercapacitors

2019 ◽  
Vol 11 (33) ◽  
pp. 30116-30124
Author(s):  
Zhifeng Zhu ◽  
Ze Chen ◽  
Gaojian Lin ◽  
Yuanhang Ge ◽  
Yingfeng Tu ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Carbon Spheres ◽  
Facile Fabrication ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

scholarly journals A Nano-Rattle SnO2@carbon Composite Anode Material for High-Energy Li-ion Batteries by Melt Diffusion Impregnation

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 804 ◽  
Author(s):  
Sivarajakumar Maharajan ◽  
Nam Hee Kwon ◽  
Pierre Brodard ◽  
Katharina M. Fromm
Keyword(s):  
Sno2 Nanoparticles ◽  
High Energy ◽  
Carbon Composite ◽  
Diffusion Method ◽  
Composite Electrodes ◽  
Carbon Spheres ◽  
Reversible Process ◽  
Silica Template ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

The huge volume expansion in Sn-based alloy anode materials (up to 360%) leads to a dramatic mechanical stress and breaking of particles, resulting in the loss of conductivity and thereby capacity fading. To overcome this issue, SnO2@C nano-rattle composites based on <10 nm SnO2 nanoparticles in and on porous amorphous carbon spheres were synthesized using a silica template and tin melting diffusion method. Such SnO2@C nano-rattle composite electrodes provided two electrochemical processes: a partially reversible process of the SnO2 reduction to metallic Sn at 0.8 V vs. Li+/Li and a reversible process of alloying/dealloying of LixSny at 0.5 V vs. Li+/Li. Good performance could be achieved by controlling the particle sizes of SnO2 and carbon, the pore size of carbon, and the distribution of SnO2 nanoparticles on the carbon shells. Finally, the areal capacity of SnO2@C prepared by the melt diffusion process was increased due to the higher loading of SnO2 nanoparticles into the hollow carbon spheres, as compared with Sn impregnation by a reducing agent.

Hollow carbon spheres/hollow carbon nanorods composites as electrode materials for supercapacitor

2019 ◽  
Vol 101 ◽  
pp. 244-250 ◽  
Author(s):  
Xinyu Fu ◽  
Lei Liu ◽  
Yifeng Yu ◽  
Haijun Lv ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

scholarly journals Co-Existence of Iron Oxide Nanoparticles and Manganese Oxide Nanorods as Decoration of Hollow Carbon Spheres for Boosting Electrochemical Performance of Li-Ion Battery

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6902
Author(s):  
Karolina Wenelska ◽  
Martyna Trukawka ◽  
Wojciech Kukulka ◽  
Xuecheng Chen ◽  
Ewa Mijowska
Keyword(s):  
Iron Oxide ◽  
Electrochemical Performance ◽  
Manganese Oxide ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Iron Oxide Nanoparticle ◽  
Carbon Spheres ◽  
Oxide Nanorods ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Here, we report that mesoporous hollow carbon spheres (HCS) can be simultaneously functionalized: (i) endohedrally by iron oxide nanoparticle and (ii) egzohedrally by manganese oxide nanorods (FexOy/MnO2/HCS). Detailed analysis reveals a high degree of graphitization of HCS structures. The mesoporous nature of carbon is further confirmed by N2 sorption/desorption and transmission electron microscopy (TEM) studies. The fabricated molecular heterostructure was tested as the anode material of a lithium-ion battery (LIB). For both metal oxides under study, their mixture stored in HCS yielded a significant increase in electrochemical performance. Its electrochemical response was compared to the HCS decorated with a single component of the respective metal oxide applied as a LIB electrode. The discharge capacity of FexOy/MnO2/HCS is 1091 mAhg−1 at 5 Ag–1, and the corresponding coulombic efficiency (CE) is as high as 98%. Therefore, the addition of MnO2 in the form of nanorods allows for boosting the nanocomposite electrochemical performance with respect to the spherical nanoparticles due to better reversible capacity and cycling performance. Thus, the structure has great potential application in the LIB field.

Template-free fabrication of nitrogen-doped hollow carbon spheres for high-performance supercapacitors based on a scalable homopolymer vesicle

2016 ◽  
Vol 4 (31) ◽  
pp. 12088-12097 ◽  
Author(s):  
Hui Sun ◽  
Yunqing Zhu ◽  
Bo Yang ◽  
Yanfang Wang ◽  
Yuping Wu ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Template Free ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Nitrogen-doped hollow carbon spheres were prepared from scalable homopolymer vesicles and used as the electrode materials of high-performance supercapacitors.

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