【摘 要】
：
Micro-nano structured LiFe1-xMnxPO4/C (0 ≤ x ≤ 0.05) cathodes were prepared by spray drying,followed by calcination at 700℃.The spherical LiFe1-xMnxPO4/C (0≤ x≤0.05) particles with the size of 0.5 to 5.0μm are composed of lots of nanoparticles of 20 to 30
【机 构】
：
Liaoning Key Lab for New Energy Battery, Dalian Jiaotong University, Dalian 116028, Liaoning, China;
论文部分内容阅读
Micro-nano structured LiFe1-xMnxPO4/C (0 ≤ x ≤ 0.05) cathodes were prepared by spray drying,followed by calcination at 700℃.The spherical LiFe1-xMnxPO4/C (0≤ x≤0.05) particles with the size of 0.5 to 5.0μm are composed of lots of nanoparticles of 20 to 30nm,and have the well-developed interconnected pore structure.In contrast,when Mn doping content is 3 mol％ (x=0,03),the LiFe0.97Mn0.03PO4/Cdemonstrates maximum specific surface area of 31.30m2/g,more uniform pore size and relatively better electrochemical performance.The initial discharge capacities are 161.59,157.04 and 153.13 mAh/g at a discharge rate of 0.2,0.5 and 1 C,respectively.Meanwhile,the discharge capacity retentions are ～100％ after 120 cycles.The improved electrochemical performance should be attributed to higher specific surface,smaller polarization voltage,and a high Li+ diffusion rate due to the micro-nano porous structure and lattice expansion produced by Mn doping.
其他文献
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
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