Improved performance of Li2FeSiO4/C composite with highly rough mesoporous morphology

CORC > 厦门大学 > 材料学院－已发表论文

	Improved performance of Li2FeSiO4/C composite with highly rough mesoporous morphology
	Fu, Rusheng ; Li, Yunsong ; Yang, Hong ; Zhang, Y ; Cheng, X ; Cheng X(程璇) ; Zhang Y(张颖)
刊名	http://dx.doi.org/10.1149/2.009305jes
	2013
关键词	Charge transfer Diffusion Iron Lithium Morphology Sol-gel process Solid state reactions
英文摘要	The Li2FeSiO4/C composites were prepared using iron startingmaterials of either insoluble ferrous (FeC2O4 · 2H2O) or soluble ferric (Fe(NO3)3 · 9H2O) compounds through sol-gel process and solid state reaction. The pure monoclinic P21/n with the rough surface consisting of a large amount of open pores was obtained using ferric iron source, while the sphere-like nanoparticles containing major impurities of Fe 3O4 (γ-Fe2O3) and Li2SiO3 were obtained using ferrous iron source. With less expensive ferric nitrate and faster heating rate, the excellent diffusion coefficients of 1.88 × 10-8 cm2 s-1 at 25°C and 1.42 × 10-7 cm2 s-1 at 55°C were obtained with the highly rough mesoporous morphology due to the enhanced interfacial kinetics with the apparent reductions in the charge transfer resistance and significant reductions in the migration resistance at the higher temperature. Coupled with higher degree of graphitized carbon, the initial and maximum discharge capacities of 213.9 and 239.2 mAh g-1 could be achieved at 55°C and C/16 based on 50 cycles of charge/discharge testing at 25°C. ? 2013 The Electrochemical Society.
语种	英语
出版者	Electrochemical Society Inc.
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87293]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Fu, Rusheng,Li, Yunsong,Yang, Hong,et al. Improved performance of Li2FeSiO4/C composite with highly rough mesoporous morphology[J]. http://dx.doi.org/10.1149/2.009305jes,2013.
APA	Fu, Rusheng.,Li, Yunsong.,Yang, Hong.,Zhang, Y.,Cheng, X.,...&张颖.(2013).Improved performance of Li2FeSiO4/C composite with highly rough mesoporous morphology.http://dx.doi.org/10.1149/2.009305jes.
MLA	Fu, Rusheng,et al."Improved performance of Li2FeSiO4/C composite with highly rough mesoporous morphology".http://dx.doi.org/10.1149/2.009305jes (2013).