【摘 要】
：
Hierarchical mesoporous MoO2/Mo2C/C microspheres,which are composed of primary nanoparticles with a size of about 30 nm,have been designed and synthesized through polymer regulation and subsequent carbonization processes.The as-synthesized microspheres we
【机 构】
：
Key Laboratory of Green Process and Engineering, Chinese Academy of Sciences, Beijing 100190, China;
论文部分内容阅读
Hierarchical mesoporous MoO2/Mo2C/C microspheres,which are composed of primary nanoparticles with a size of about 30 nm,have been designed and synthesized through polymer regulation and subsequent carbonization processes.The as-synthesized microspheres were characterized by XRD,Raman,SEM,TEM,XPS measurements and so on.It was found that polyethylene glycol acted as a structure-directing agent,mild reducing agent and carbon source in the formation of these hierarchical mesoporous MoO2/Mo2C/C microspheres.Moreover,the electrochemical property of the microspheres was also investigated in this work.Evaluated as an anode material for lithium ion batteries,the hierarchical mesoporous MoO2/Mo2C/C electrode delivered the discharge specific capacities of 665 and 588 mAh/g after 100 cycles at current densities of 100 and 200 mA/g,respectively.The satisfactory cycling performance and controllable process facilitate the practical applications of the hierarchical mesoporous MoO2/Mo2C/C as a potential anode material in high-energy density lithium-ion batteries.
其他文献
Fullerenes and their derivatives are important types of electron acceptor materials and play a vital role in organic solar cell devices.However.the fullerene acceptor material has some difficulties to overcome the intrinsic shortcomings,such as weak absor
Non-porous carbon sphere was used as support to synthesize supported cobalt Fischer-Tropsch catalysts with high activity and durability. Strong metal-support interaction was avoided and intrinsic activity of pristine cobalt nano-particles was studied. The
Non-aqueous redox flow batteries,because of larger operating voltage,have attracted considerable attention for high-density energy storage applications.However,the study of the anolyte is rather limited compared with the catholyte due to the labile proper
Nitrogen doping has been proved to be an effective way to modify the properties of graphene and other carbon materials.Herein,we explore a composite with nitrogen doped carbon overlayers wrapping SiC substrate as a support for Ni (Ni/CN-SiC) and evaluate
In this paper,we present the development of flexible zinc-air battery.Multiwalled carbon nanotubes (MWCNTs) were added into electrodes to improve their performance.It was found that MWCNTs were effective conductive additive in anode as they bridged the zi
Zn(O,S) (zinc oxysulfide) is an important chalcogenide material recently reported to be potentially applied as electrode buffers in thin film solar cells.Both vacuum and solution approaches have enabled the fabrication of Zn(O,S) films.However they either
Thioetherification between mercaptan and diolefin is an efficient process to remove mercaptans in FCC gasoline at mild condition,during which the selective hydrogenation of diolefin to monoolefin is also expected.Here,SiO2 supported transition metal (Ee,C
A serial of protonated and layered transition metal oxides,including layered HTaWO6,HNbMoO6 as well as HNbWO6,were synthesized by solid-state reaction and ion-exchange.The layered HTaWO6 has been systematically studied as a solid acid to realize the dehyd
The catalyst preparation strategy was based on a strict introduction sequence of rhenium and platinum precursors and their strong interaction with carbon support resulted in the formation of 0.5 nm Pt-ReOx species of atomic dispersion,where platinum is me
Lithium-ion hybrid supercapacitors (Li-HSCs) and dual-ion batteries (DIBs) are two types of energy storage devices that have attracted extensive research interest in recent years.Li-HSCs and DIBs have similarities in device structure,tendency for ion migr