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Studies of V doping for the LiFePO4-based Li Ion batteries
Hua Ning; Wang Chenyun; Kang Xueya; Wumair Tuerdi; Han Ying; Kang, XY
2010
Source PublicationJournal of Alloys and Compounds
ISSN9258388
Volume503Issue:1Pages:204-208
AbstractAlien atom doping has been adopted to modify the electrochemical performance of olivine type LiFePO4 for cathode material. Here, we report that vanadium-doping can improve the performance of LiFePO4/C immensely. LiFePO4/C and V-doped LiFePO4/C cathode materials were first synthesized by carbothermal reduction method. Physico-chemical characterizations were done by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Electrochemical behavior of the cathode materials was analyzed using cyclic voltammetry (CV) and galvanostatic measurements. ICP and XRD analyses indicated that V ions were sufficiently doped in LiFePO4 and did not alter its crystal structure and exhibited the variation of lattice parameters with the doped degree. From the CV, the V ion doping affected the Li+ ionic diffusion coefficient during both the delithiation and lithiation processes and it became larger with an appropriate amount doping. From the results, it is noted that vanadium ions doping can improve performance of LiFePO4, especially on the aspect of stable cycle-life at higher C rate.
KeywordOlivine Compound V-ion Doping Li++ Diffusion Coefficient Electrochemical Properties
Subject AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
DOI10.1016/j.jallcom.2010.04.233
Indexed BySCI
WOS IDWOS:000280623000041
Citation statistics
Cited Times:65[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/1827
Collection材料物理与化学研究室
Corresponding AuthorKang, XY
AffiliationXinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Hua Ning,Wang Chenyun,Kang Xueya,et al. Studies of V doping for the LiFePO4-based Li Ion batteries[J]. Journal of Alloys and Compounds,2010,503(1):204-208.
APA Hua Ning,Wang Chenyun,Kang Xueya,Wumair Tuerdi,Han Ying,&Kang, XY.(2010).Studies of V doping for the LiFePO4-based Li Ion batteries.Journal of Alloys and Compounds,503(1),204-208.
MLA Hua Ning,et al."Studies of V doping for the LiFePO4-based Li Ion batteries".Journal of Alloys and Compounds 503.1(2010):204-208.
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