NDLI: Li0.995Nb0.005Mn0.85Fe0.15PO4/C as a high-performance cathode material for lithium-ion batteries

Content Provider	Springer Nature Link
Author	Lv, Xiao Yan Huang, Qiao Ying Wu, Zhi Su, Jing Long, Yun Fei Wen, Yan Xuan
Copyright Year	2017
Abstract	Li0.995Nb0.005Mn0.85Fe0.15PO4/C was prepared and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and electrochemical tests. The results of XRD and XPS show that Nb5+ and Fe2+ are introduced into the lattice of LiMnPO4 to form solid solution and generate a synergistic effect on the shrinkage of lattice and the formation of metal ion-vacancy pairs. When charged/discharged at 1 C, Li0.995Nb0.005Mn0.85Fe0.15PO4/C delivers a discharge capacity of 146 and 161 mAh g−1 with a capacity retention ratio of ∼100 % after 50 cycles at 25 and 60 °C, respectively. Even charged/discharged at 5 C, this sample still gives a discharge capacity of 100 mAh g−1, exhibiting good rate capability and cycling stability. The improved electrochemical performance can be ascribed to the synergistic effect between Nb5+ and Fe2+, which significantly enhances the dynamic stability of the olivine structure, Li+ diffusion, and electrochemical kinetics. These results further prove that the electrochemical properties of lithium manganese phosphate can be effectively enhanced by Fe2+ and Nb5+ co-doping.
Starting Page	1499
Ending Page	1507
Page Count	9
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	21
Issue Number	5
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-01-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lithium-ion batteries Cathode Lithium manganese phosphate Cation substitution Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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