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Synthesis and electrochemical properties of Li3V2(P1-xBxO4)(3)/C cathode materials
Feng, Kai1; Cheng, Yi1,2; Wang, Meiri1; Zhang, Hongzhang1; Li, Xianfeng1,3; Zhang, Huamin1,3
刊名JOURNAL OF MATERIALS CHEMISTRY A
2015
DOI10.1039/c5ta04724b
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
关键词[WOS]LITHIUM-ION BATTERIES ; VANADIUM PHOSPHATE ; PERFORMANCE ; LI3V2(PO4)(3) ; MN ; COMPOSITES ; ELECTRODES ; FE ; TI
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.
语种英语
WOS记录号WOS:000361698600033
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146559
专题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
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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.
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