Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials

	Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials
	Feng, Kai 1; Cheng, Yi 1,2; Wang, Meiri 1; Zhang, Hongzhang 1; Li, Xianfeng 1,3; Zhang, Huamin 1,3
刊名	journal of materials chemistry a
	2015
卷号	3 期号:38 页码:19469-19475
英文摘要	b-doped compounds li3v2(p1-xbxo4)(3)/c (x = 0, 0.01, 0.03, and 0.07) are prepared by a sol-gel method. the crystal structure, morphology and electrochemical properties of b-doped li3v2(po4)(3) are investigated. x-ray diffraction (xrd) analysis indicates that a b atom enters the crystal structure of li3v2(po4)(3) but does not change the monoclinic structure. cycle stability and rate performance measurements reveal that moderate b doping improves the electrochemical properties of li3v2(po4)(3). among all the b-doped samples, li3v2(p0.97b0.03o4)(3)/c shows the largest initial discharge capacity, best cycle stability and rate performances. in the potential range of 3.0-4.3 v, li3v2(p0.97b0.03o4)(3)/c delivers a discharge capacity of 127.5 ma h g(-1) at 0.2c rate, while at 20c the discharge capacity remains above 100 ma h g(-1). after 100 cycles, the discharge capacity retention is 98%. moreover, electrochemical impedance spectroscopy (eis) and cyclic voltammetry (cv) curves indicate that b doping not only decreases the charge transfer resistance but also increases the li-ion diffusion rate. the excellent electrochemical performance of li3v2(p0.97b0.03o4)(3)/c can be attributed to its larger li ion diffusion, smaller particle size, and higher structural stability and electronic conductivity induced by b doping.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; energy & fuels ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; energy & fuels ; materials science
关键词[WOS]	lithium-ion batteries ; vanadium phosphate ; performance ; li3v2(po4)(3) ; mn ; composites ; electrodes ; fe ; ti
收录类别	SCI
语种	英语
WOS记录号	WOS:000361698600033
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/146559]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Div Energy Storage, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Feng, Kai,Cheng, Yi,Wang, Meiri,et al. Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials[J]. journal of materials chemistry a,2015,3(38):19469-19475.
APA	Feng, Kai,Cheng, Yi,Wang, Meiri,Zhang, Hongzhang,Li, Xianfeng,&Zhang, Huamin.(2015).Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials.journal of materials chemistry a,3(38),19469-19475.
MLA	Feng, Kai,et al."Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials".journal of materials chemistry a 3.38(2015):19469-19475.