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题名: Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials
作者: Feng, Kai1;  Cheng, Yi1, 2;  Wang, Meiri1;  Zhang, Hongzhang1;  Li, Xianfeng1, 3;  Zhang, Huamin1, 3
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2015
DOI: 10.1039/c5ta04724b
卷: 3, 期:38, 页:19469-19475
收录类别: SCI
文章类型: Article
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
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.
关键词[WOS]: LITHIUM-ION BATTERIES ;  VANADIUM PHOSPHATE ;  PERFORMANCE ;  LI3V2(PO4)(3) ;  MN ;  COMPOSITES ;  ELECTRODES ;  FE ;  TI
语种: 英语
WOS记录号: WOS:000361698600033
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146559
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
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.
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