Rational confinement of molybdenum based nanodots in porous carbon for highly reversible lithium storage

2016 ◽  
Vol 4 (27) ◽  
pp. 10403-10408 ◽  
Author(s):  
Xiang Deng ◽  
Bote Zhao ◽  
Yijun Zhong ◽  
Yanping Zhu ◽  
Zongping Shao
Keyword(s):  
Transition Metal ◽  
Porous Carbon ◽  
Carbon Sources ◽  
Carbon Matrix ◽  
Lithium Storage ◽  
Synthesis Route ◽  
Highly Porous

A rational synthesis route towards <5 nm transition metal-based nanodots confined in a highly porous carbon matrix is proposed without adding external carbon sources and applied for highly reversible lithium storage.

scholarly journals Facile Fabrication of Nitrogen, Phosphorus and Silicon Co-Doped Porous Carbon as an Efficient Oxygen Reduction Catalyst for Primary Zn-Air Battery

NANO ◽  
2019 ◽  
Vol 14 (09) ◽  
pp. 1950108 ◽  
Author(s):  
Renxing Huang ◽  
Ying Lei ◽  
Dandan Zhang ◽  
Huaming Xie ◽  
Xingyong Liu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Porous Carbon ◽  
High Surface ◽  
Carbon Sources ◽  
Carbon Matrix ◽  
Reduction Reaction ◽  
Onset Potential ◽  
Good Surface ◽  
Hierarchical Porous ◽  
Air Battery

It is highly pleasurable but challenging to develop economical and efficient catalysts for accelerating the oxygen reduction reaction (ORR) endowed with sluggish kinetics involved in renewable energy conversion and storage systems such as Zn-air batteries. Herein, N, P and Si tri-doped porous carbon (SiN-PA900) catalysts was prepared by a simple one-step pyrolysis strategy using the mixture of the ionic liquid formed by phytic acid (PA) and N-methylimidazole and tetraethyl orthosilicate (TEOS) as N, P, Si and carbon sources, and the PA as pore-foaming agent. The resulting SiN-PA900 shows favorable catalytic activity toward ORR with an onset potential of 0.94 V versus RHE, half-wave potential of 0.81 V versus RHE, robust stability and excellent tolerance for methanol in alkaline medium, which are comparable to those of the commercial 20% Pt/C. More impressively, the assembled primary Zn-air battery employing the SiN-PA900 as cathode catalysts can achieve a peak power density of 181.4[Formula: see text]mW/cm2. Those encouraging properties could be attributed to a synergistic effect of the doped N, P and Si atoms in the carbon matrix, good surface wettability, high surface areas and hierarchical porous structures for sufficient contact and rapid transportation of the reactants in terms of composition and structures.

scholarly journals The carbonization of aromatic molecules with three-dimensional structures affords carbon materials with controlled pore sizes at the Ångstrom-level

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Tomoki Ogoshi ◽  
Yuma Sakatsume ◽  
Katsuto Onishi ◽  
Rui Tang ◽  
Kazuma Takahashi ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Carbon Sources ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Thermal Polymerization ◽  
Sodium Ion Battery ◽  
Pore Sizes ◽  
Aromatic Molecules ◽  
Template Methods

AbstractCarbon materials with controlled pore sizes at the nanometer level have been obtained by template methods, chemical vapor desorption, and extraction of metals from carbides. However, to produce porous carbons with controlled pore sizes at the Ångstrom-level, syntheses that are simple, versatile, and reproducible are desired. Here, we report a synthetic method to prepare porous carbon materials with pore sizes that can be precisely controlled at the Ångstrom-level. Heating first induces thermal polymerization of selected three-dimensional aromatic molecules as the carbon sources, further heating results in extremely high carbonization yields (>86%). The porous carbon obtained from a tetrabiphenylmethane structure has a larger pore size (4.40 Å) than those from a spirobifluorene (4.07 Å) or a tetraphenylmethane precursor (4.05 Å). The porous carbon obtained from tetraphenylmethane is applied as an anode material for sodium-ion battery.

Spatially Confined Formation of Single Atoms in Highly Porous Carbon Nitride Nanoreactors

ACS Nano ◽  
2021 ◽  
Author(s):  
Yunpeng Zuo ◽  
Tingting Li ◽  
Ning Zhang ◽  
Tianyun Jing ◽  
Dewei Rao ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Nitride ◽  
Single Atoms ◽  
Highly Porous

Titanium and nitrogen co-doped porous carbon for high-performance supercapacitors

2021 ◽  
Author(s):  
Yurou Chen ◽  
Xin Feng ◽  
Qi Wang ◽  
WenXian Gu ◽  
Wanyi Wu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Porous Carbon ◽  
High Performance ◽  
Carbon Materials ◽  
Solvothermal Method ◽  
Capacitive Performance ◽  
Co Doped

This work presents a simple solvothermal method to synthesize Ti, N co-doped carbon materials, in which the inclusion of a small amount of transition metal Ti significantly improved their electrochemical capacitive performance.

Infiltrating sulfur into a highly porous carbon sphere as cathode material for lithium–sulfur batteries

2014 ◽  
Vol 58 ◽  
pp. 204-207 ◽  
Author(s):  
Xiaohui Zhao ◽  
Dul-Sun Kim ◽  
Hyo-Jun Ahn ◽  
Ki-Won Kim ◽  
Kwon-Koo Cho ◽  
...  
Keyword(s):  
Cathode Material ◽  
Porous Carbon ◽  
Carbon Sphere ◽  
Lithium Sulfur Batteries ◽  
Highly Porous ◽  
Lithium Sulfur
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