Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica

doi:10.1007/s11581-017-2399-9

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	Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica
	Zhang, Qingtang; Yan, Chao; Guo, Junhong; Wang, Xiaomei
刊名	Ionics
	2018-09-01
卷号	24 期号:9 页码:2555-2563
关键词	Amorphous carbon Lithium compounds Mesoporous materials Nanocomposites Nanostructured materials Particle size Particle size analysis Pore structure Silica Solid state reactions Crystalline structure Discharge capacities Electrochemical performance External surfaces Li2FeSiO4 Lithium ion diffusion Nano Silica Structure analysis
ISSN号	09477047
DOI	10.1007/s11581-017-2399-9
英文摘要	Mesoporous Li2FeSiO4/C nanocomposites (LFS-FNS and LFS-NS) were prepared from fumed nano silica (FNS) and nano silica (NS) through facile solid-state reactions, respectively. XRD analysis indicates that the crystalline structures of LFS-FNS and LFS-NS are indexed to monoclinic Li2FeSiO4 of P21. SEM results prove that the particle size of LFS-FNS and FNS (25~40 nm) is smaller than that of LFS-NS and NS, revealing the particle size of Li2FeSiO4/C nanocomposites can be tuned by choosing different silica. TEM further indicates Li2FeSiO4 nanoparticles are uniformly dispersed in the amorphous carbon networking of LFS-FNS. Pore structure analysis indicates the external surface areas of LFS-FNS as well as LFS-NS are 51.4 and 36.1 m2 g−1, indicating the pore properties of mesoporous Li2FeSiO4/C nanocomposites can be controlled by using different silica as silicon resource. The reduced particle size and high external surface area shorten the lithium-ion diffusion path and make LFS-FNS possess better electrochemical performance over LFS-NS. The discharge capacity of LFS-FNS is as high as 172 mA h g−1 at 0.1 C. © 2017, Springer-Verlag GmbH Germany, part of Springer Nature.
WOS研究方向	Chemistry ; Electrochemistry ; Physics
语种	英语
出版者	Institute for Ionics
WOS记录号	WOS:000441555200005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114146]
专题	石油化工学院材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Qingtang,Yan, Chao,Guo, Junhong,et al. Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica[J]. Ionics,2018,24(9):2555-2563.
APA	Zhang, Qingtang,Yan, Chao,Guo, Junhong,&Wang, Xiaomei.(2018).Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica.Ionics,24(9),2555-2563.
MLA	Zhang, Qingtang,et al."Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica".Ionics 24.9(2018):2555-2563.