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.

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.

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.

Facile synthesis of novel bowl-like hollow carbon spheres by the combination of hydrothermal carbonization and soft templating

2017 ◽  
Vol 53 (20) ◽  
pp. 2922-2925 ◽  
Author(s):  
Zili Zhang ◽  
Mingli Qin ◽  
Baorui Jia ◽  
Hongzhou Zhang ◽  
Haoyang Wu ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Hydrothermal Carbonization ◽  
Template Method ◽  
Carbon Spheres ◽  
Facile Synthesis ◽  
Soft Templating ◽  
New Strategy ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

A new strategy to synthesize novel bowl-like hollow spheres by the combination of hydrothermal carbonization and an emulsion template method was presented.

Nitrogen-doped hollow carbon spheres with large mesoporous shells engineered from diblock copolymer micelles

2016 ◽  
Vol 52 (3) ◽  
pp. 505-508 ◽  
Author(s):  
Jing Tang ◽  
Jian Liu ◽  
Rahul R. Salunkhe ◽  
Tao Wang ◽  
Yusuke Yamauchi
Keyword(s):  
Diblock Copolymer ◽  
Template Method ◽  
Carbon Spheres ◽  
Nitrogen Doped ◽  
Copolymer Micelles ◽  
Hollow Carbon ◽  
20 Nm ◽  
First Time ◽  
Hollow Carbon Spheres

Nitrogen-doped hollow carbon spheres with engineered large tunable mesoporous (∼20 nm) shells are successfully synthesized for the first time by using a dual-template method.

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).

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

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

Surface Polymerization and Controlled Pyrolysis: Tailorable Synthesis of Bumpy Hollow Carbon Spheres for Energy Storage

Langmuir ◽  
2021 ◽  
Vol 37 (13) ◽  
pp. 4007-4015
Author(s):  
Qianyi Tao ◽  
Zhifeng Zhu ◽  
Sunjie Ye ◽  
Gaojian Lin ◽  
Hui Chen ◽  
...  
Keyword(s):  
Energy Storage ◽  
Carbon Spheres ◽  
Surface Polymerization ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres
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