Electrochemical properties of niobium and phosphate doped spherical   Li-rich spinel LiMn2O4 synthesized by ion implantation method

doi:10.1016/j.cclet.2017.03.035

CORC > 北京大学 > 化学与分子工程学院

	Electrochemical properties of niobium and phosphate doped spherical Li-rich spinel LiMn2O4 synthesized by ion implantation method
	Li, Wei ; Siqin, Gao-Wa ; Zhu, Zhi ; Qi, Lu ; Tian, Wen-Huai
刊名	CHINESE CHEMICAL LETTERS
	2017
关键词	Spinels Ion implantation Li-ion batteries LiMn2O4 Doping CATHODE MATERIALS SECONDARY BATTERIES HIERARCHICAL LINI0.5MN1.5O4 ELECTRODE MATERIALS FACILE SYNTHESIS MN-SPINEL LITHIUM PERFORMANCE TEMPERATURE FLUORINE
DOI	10.1016/j.cclet.2017.03.035
英文摘要	Spherical Li-rich lithium manganese oxide (LMO) spinel material was synthesized by an ion implanted method assisted by polyalcohol doped with Niobium and Phosphate simultaneously. The material was characterized by scanning electron microscopy, X-ray diffraction and BET specific surface area analysis. The electrochemical performances were investigated with galvanostatic techniques and cyclic voltammetry. The synthesis process was investigated with TG/DSC. The results show that the lithium ion can be immersed into the pore of manganese dioxide at a low temperature with the ion implanted method. The prepared materials have a higher discharge capacity and better crystallization than those prepared by solid phase method. The doped Nb can improve the capacity of the Li-rich LMO spinel and reinforce the crystal growth along (111) and (400) planes. The crystal grains show circular and smooth morphology, which makes the specific surface area greatly decreased. Phosphate-doped LMO spinel exhibits good high-rate capacity and structure stability. The prepared Li1.09Mn1.87Nb0.031O3.99(PO4)(0.021) delivers a discharge capacity of 119 mAhg(-1) at 0.2 C (1 C = 148 mAg(-1)) and 112.8 mAhg(-1) at 10 C, the discharge capacity retention reaches 98% at 1 degrees C after 50 cycles at 25 degrees C and 94% at 55 degrees C. (C) 2017 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.; National High Technology Research and Development Program of China (863 Program) [2008AA11A102]; SCI(E); ARTICLE; 7; 1438-1446; 28
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472332]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Li, Wei,Siqin, Gao-Wa,Zhu, Zhi,et al. Electrochemical properties of niobium and phosphate doped spherical Li-rich spinel LiMn2O4 synthesized by ion implantation method[J]. CHINESE CHEMICAL LETTERS,2017.
APA	Li, Wei,Siqin, Gao-Wa,Zhu, Zhi,Qi, Lu,&Tian, Wen-Huai.(2017).Electrochemical properties of niobium and phosphate doped spherical Li-rich spinel LiMn2O4 synthesized by ion implantation method.CHINESE CHEMICAL LETTERS.
MLA	Li, Wei,et al."Electrochemical properties of niobium and phosphate doped spherical Li-rich spinel LiMn2O4 synthesized by ion implantation method".CHINESE CHEMICAL LETTERS (2017).