Nanocomposite C/Li2MnSiO4 cathode material for lithium ion batteries

C/Li2MnSiO4 nanocomposite material was obtained by sol–gel method followed by carbon coating process. Electrochemical properties of nanosized C/Li2MnSiO4 cathode composite were studied in terms of changes in the long range ordering of the crystalline structure. Structural morphology was determined u...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2013-12, Vol.244, p.510-514
Main Authors: Świętosławski, M., Molenda, M., Furczoń, K., Dziembaj, R.
Format: Article
Language:English
Subjects:
Amorphization
Applied sciences
Carbon
Carbon coating
Cathodes
Crystal structure
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemical impedance spectroscopy
Exact sciences and technology
Li-ion batteries
Li2MnSiO4
Lithium-ion batteries
Materials
Nanocomposite
Nanostructure
Order disorder
Sol gel process
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:C/Li2MnSiO4 nanocomposite material was obtained by sol–gel method followed by carbon coating process. Electrochemical properties of nanosized C/Li2MnSiO4 cathode composite were studied in terms of changes in the long range ordering of the crystalline structure. Structural morphology was determined using X-ray diffraction (XRD) and transmission electron microscopy (TEM). Ex-situ XRD studies confirmed amorphization of material during electrochemical process. Even though, C/Li2MnSiO4 composite revealed high discharge capacity (up to 185 mAh g−1) within 1.5–4.8 V, what corresponds to the exchange of more than one lithium-ion per formula unit (1.11 mole Li+). Electrochemical impedance spectroscopy (EIS) studies showed substantial changes in electrical properties of Li2MnSiO4 during amorphization process. The obtained results suggest that electrochemically formed amorphous Li2MnSiO4 has much higher electrical conductivity and Li+ ions diffusibility than as-obtained in sol–gel process crystalline one. •C/Li2MnSiO4 nanocomposite was obtained by sol–gel method and carbon coating process.•Fine and uniform carbon nanocoatings on nanometric Li2MnSiO4 material were obtained.•Amorphous Li2MnSiO4 was formed during electrochemical process.•DLi+ was calculated for charged and discharged C/Li2MnSiO4 material.•C/Li2MnSiO4 nanocomposite revealed high discharge capacity 185 mA h g−1 at 1.5–4.8 V.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2013.02.078