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2022-04-27T08:56:46Z
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Improvement of electrochemical properties of LiNi1/3Co1/3Mn1/3O2 by coating with V2O5 layer
石田, 政義
Liu, Xizheng
He, Ping
Li, Huiqiao
Ishida, Masayoshi
Zhou, Haoshen
The capacity fading and lower rate of layered cathode materials prohibited widely applications in lithium ion batteries. In this paper, V2O5 was coated on the surface of LiNi1/3Co1/3Mn1/3O2 to enhance its electrochemical performance at a voltage range of 2.8–4.5 V. The prepared materials were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM). The capacity retention at the 100th cycle have been increased from 62% to over 80% for the 3 wt.% V2O5 coated sample. The rate performance has been improved by V2O5 coating which mainly because of the coating layer enhance the surface electronic/ionic transport. Cyclic voltammetry (CV) showed that the redox properties of the pristine sample have a more obvirous changes after charge–discharge cycles compared with the coated samples. Electrochemical impedance spectroscopy (EIS) results suggest that the V2O5 coating layer play an important role in suppressing the increase of cell impedance with cycling especially for the increase of charge-transfer resistance (Rct).
journal article
Elsevier B.V.
2012-03
application/pdf
Journal of alloys and compounds
552
76
82
http://hdl.handle.net/2241/118753
0925-8388
AA10817249
https://tsukuba.repo.nii.ac.jp/record/28592/files/JAC_552_76.pdf
eng
10.1016/j.jallcom.2012.10.090
© 2012 Elsevier B.V.
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of alloys and compounds. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in PUBLICATION, VOL.552 (2012) DOI:10.1016/j.jallcom.2012.10.090