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Preparation and Electrochemical Performance of Mg2 + Doped Li4Ti5O12 Anode Materials for Lithium-Ion Batteries
- Source :
- Materials Science Forum. 960:238-243
- Publication Year :
- 2019
- Publisher :
- Trans Tech Publications, Ltd., 2019.
-
Abstract
- Spinel Li4Ti5O12 (LTO) doped with Mg2+ was synthesized by solid-phase reaction method. The Mg2+ doping quantity was 3%, 6%, 9%, and 12%, respectively. The structure and electrochemical performance of the prepared LTO composites were investigated by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Electrochemical Impedance Spectroscopy (EIS), and galvanostatic charge-discharge tests. It was found that the doped Mg ion did not change the structure of Li4Ti5O12, and it was evenly distributed around Li4Ti5O12. When Mg2+ doping quantity increased from 3% to 12%, the internal resistance and charge transfer resistance of the composite both decreased. The first discharge specific capacity of 6%-Mg2+ doped LTO composite was 168 mAh/g, which was close to the theoretical capacity of pure lithium titanate (175 mAh/g), and the capacity retention rate was 98% after 100 cycles.
- Subjects :
- Materials science
Mechanical Engineering
Doping
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Electrochemistry
01 natural sciences
0104 chemical sciences
Anode
Ion
chemistry
Chemical engineering
Mechanics of Materials
General Materials Science
Lithium
0210 nano-technology
Subjects
Details
- ISSN :
- 16629752
- Volume :
- 960
- Database :
- OpenAIRE
- Journal :
- Materials Science Forum
- Accession number :
- edsair.doi...........983a67128233473bfddbd970749a594e