Porous LiMn2O4 Microspheres with Different Pore Size: Preparation and Application as Cathode Materials for Lithium Ion Batteries

doi:10.1115/1.4040567

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	Porous LiMn2O4 Microspheres with Different Pore Size: Preparation and Application as Cathode Materials for Lithium Ion Batteries
	Li, Shiyou; Zhu, Konglei; Liu, Jinliang; Zhao, Dongni; Cui, Xiaoling
刊名	Journal of Electrochemical Energy Conversion and Storage
	2019-02-01
卷号	16 期号:1
关键词	Cathodes Electric discharges Gas adsorption Ions Lithium compounds Manganese oxide Microspheres Morphology Nanoparticles Pore size Scanning electron microscopy Silicon compounds Charge-discharge process Discharge capacities Electrochemical behaviors Electrochemical performance Good capacity retentions Lithium manganese oxide Morphology and structures Porous microspheres
ISSN号	23816872
DOI	10.1115/1.4040567
英文摘要	Three types of LiMn2O4 (LMO) microspheres with different pore size are prepared by a facile method, using porous MnCO3-MnO2 and Mn2O3 microspheres as the selfsupporting template, for lithium ion batteries (LIBs) cathode material. Briefly, Mn2O3 and MnO2 microspheres are heated in air at 600 C for 10 h to synthesize porous Mn2O3 spheres. Then the mixture of as-prepared spherical Mn2O3 and LiNO3 is calcined to obtain the LMOs. The morphology and structure of LMOs are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and nitrogen adsorption/desorption analyses. The result shows that the maximum pore diameters of LMOs are 17 nm, 19 nm, and 11 nm, respectively. All LMOs microspheres are composed of similar sized nanoparticles; however, the surface of these microspheres is strewed with dense tinier pores or sparse larger pores. Generally, the nanoparticles will reduce the path of Li- ion diffusion and increases the reaction sites for lithium insertion/extraction. Moreover, the pores can provide buffer spaces for the volume changes during chargedischarge process. The electrochemical performances of LMOs are investigated and LMO2 exhibits extremely good electrochemical behavior, especially the rate capability. The as-prepared LMO2 delivers a discharge capacity of 124.3 mAh g1 at 0.5 C, retaining 79.6 mAh g1 even at 5 C. The LMO2 sample also shows good capacity retention of 96.9% after 100 cycles at 0.5 C. Copyright © 2019 by ASME.
WOS研究方向	Electrochemistry ; Energy & Fuels
语种	英语
出版者	American Society of Mechanical Engineers (ASME)
WOS记录号	WOS:000452772600006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113778]
专题	石油化工学院
作者单位	College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Li, Shiyou,Zhu, Konglei,Liu, Jinliang,et al. Porous LiMn2O4 Microspheres with Different Pore Size: Preparation and Application as Cathode Materials for Lithium Ion Batteries[J]. Journal of Electrochemical Energy Conversion and Storage,2019,16(1).
APA	Li, Shiyou,Zhu, Konglei,Liu, Jinliang,Zhao, Dongni,&Cui, Xiaoling.(2019).Porous LiMn2O4 Microspheres with Different Pore Size: Preparation and Application as Cathode Materials for Lithium Ion Batteries.Journal of Electrochemical Energy Conversion and Storage,16(1).
MLA	Li, Shiyou,et al."Porous LiMn2O4 Microspheres with Different Pore Size: Preparation and Application as Cathode Materials for Lithium Ion Batteries".Journal of Electrochemical Energy Conversion and Storage 16.1(2019).