Synthesis, characterization, and electrochemical performance of V-doped Li2MnSiO4/C composites for Li-ion battery

High-capacity Li2MnSiO4/C (LMS/C) nanoparticles doped with V3+ were prepared using sonochemistry under multibubble sonoluminescence (MBS) conditions, and the physical and electrochemical properties of the nanoparticles were characterized. The results showed that substituting Mn2+ with V3+ was effect...

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Bibliographic Details
Published in:Materials letters 2016-02, Vol.164, p.270-273
Main Authors: Hwang, Chahwan, Kim, Taejin, Noh, Yohan, Cha, Wansik, Shim, Joongpyo, Kwak, Kyungwon, Ok, Kang Min, Lee, Kyung-Koo
Format: Article
Language:English
Subjects:
Carbon-carbon composites
Cathode active material
Crystal structure
Diffusion coefficient
Electrochemical analysis
Grain size
Lithium manganese silicate
Lithium-ion batteries
Nanoparticles
Rechargeable batteries
Sonochemical reaction
Sonoluminescence
Vanadium doping
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Summary:High-capacity Li2MnSiO4/C (LMS/C) nanoparticles doped with V3+ were prepared using sonochemistry under multibubble sonoluminescence (MBS) conditions, and the physical and electrochemical properties of the nanoparticles were characterized. The results showed that substituting Mn2+ with V3+ was effective in reducing the grain size, purifying the crystalline phase, and enhancing the electrochemical properties. In particular, 5 and 10mol% V3+-doped LMS/C exhibited diffusion coefficients of 5.58×10−14cm2s−1 and 1.19×10−13cm2s−1, respectively. •Precursors of V-doped LMS were synthesized by a fast sonochemical reaction.•The oxidation state of vanadium in V-doped LMS is assigned to trivalent.•The diffusion coefficient of LMS can be improved by substituting Mn2+ with V3+.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2015.10.113