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A Bi-doped Li3V2(PO4)(3)/C cathode material with an enhanced high-rate capacity and long cycle stability for lithium ion batteries
Cheng, Yi1,2; Feng, Kai1; Zhou, Wei1,2; Zhang, Hongzhang1; Li, Xianfeng1,3; Zhang, Huamin1,3
Source PublicationDALTON TRANSACTIONS
2015
DOI10.1039/c5dt03225c
Volume44Issue:40Pages:17579-17586
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Inorganic & Nuclear
WOS Research AreaChemistry
WOS KeywordELECTROCHEMICAL PERFORMANCE ; HYDROTHERMAL SYNTHESIS ; BEHAVIOR ; FE ; COMPOSITE ; LIMN2O4 ; MN ; TI
AbstractBi-doped compounds Li3V2-xBix(PO4)(3)/C (x = 0, 0.01, 0.03, 0.05, 0.07) are prepared by a sol-gel method. The effects of Bi doping on the physical and electrochemical properties of Li3V2(PO4)(3) are investigated. X-ray diffraction (XRD) analysis indicates that Bi doping does not change the monoclinic structure of Li3V2(PO4)(3). A detailed analysis of the XRD patterns suggests that Bi3+ ions partly enter into the crystal structure of Li3V2(PO4)(3) and enlarge the lattice volume of Li3V2(PO4)(3). According to the results of cycle and rate performance measurements, moderate Bi3+ doping is beneficial in improving the electrochemical properties of Li3V2(PO4)(3). Among all the samples, Li3V1.97Bi0.03(PO4)(3)/C shows the best cycle and rate performance. At 3.0-4.3 V, the initial discharge capacity of Li3V1.97Bi0.03(PO4)(3)/C is as high as 130 mA h g(-1), close to the theoretical specific capacity of 133 mA h g(-1). The capacity retention of Li3V1.97Bi0.03(PO4)(3)/C is almost 100% after 100 cycles at 3.0-4.3 V. In addition, Li3V1.97Bi0.03(PO4)(3)/C exhibits excellent low-temperature and high-rate performance. Impedance spectroscopy (EIS) and cyclic voltammetry (CV) curves indicate lower charge transfer resistance and a larger Li ion diffusion rate of Li3V1.97Bi0.03(PO4)(3)/C than the primary Li3V2(PO4)(3)/C. The excellent electrochemical performance of Li3V1.97Bi0.03(PO4)(3)/C can be attributed to its larger Li ion diffusion channels, higher electronic conductivity, higher structural stability and smaller particle size.
Language英语
WOS IDWOS:000362362500018
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146580
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, 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, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Yi,Feng, Kai,Zhou, Wei,et al. A Bi-doped Li3V2(PO4)(3)/C cathode material with an enhanced high-rate capacity and long cycle stability for lithium ion batteries[J]. DALTON TRANSACTIONS,2015,44(40):17579-17586.
APA Cheng, Yi,Feng, Kai,Zhou, Wei,Zhang, Hongzhang,Li, Xianfeng,&Zhang, Huamin.(2015).A Bi-doped Li3V2(PO4)(3)/C cathode material with an enhanced high-rate capacity and long cycle stability for lithium ion batteries.DALTON TRANSACTIONS,44(40),17579-17586.
MLA Cheng, Yi,et al."A Bi-doped Li3V2(PO4)(3)/C cathode material with an enhanced high-rate capacity and long cycle stability for lithium ion batteries".DALTON TRANSACTIONS 44.40(2015):17579-17586.
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