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Improving the Electrochemical Performance of LiMn2O4by Amorphous Carbon Coating
- Source :
- Fullerenes, Nanotubes and Carbon Nanostructures. 23:676-679
- Publication Year :
- 2014
- Publisher :
- Informa UK Limited, 2014.
-
Abstract
- A novel cyclohexanone hydrothermal method had been firstly adopted to synthesize LiMn2O4, which was then modified with carbon coating through a post-heat treatment. X-ray diffraction (XRD) and scanning electron microscopy (SEM) exhibited that the particles were well-distributed and the primary grains were about 0.8 μm in size. Transmission electron microscope (TEM) indicated the LiMn2O4/C was uniformly coated with a carbon layer about 1.5 nm in thickness. The as-prepared bare LiMn2O4 exhibited a high initial discharge capacity of 127.9 mAh g−1 at 0.1 C, and the specific capacity increased to 138.5 mAh g−1 at 0.1 C by carbon coating. Moreover, it exhibited more excellent cycling maintaining 97.76% of its initial discharge capacity after 100 charge–discharge cycles. All the tests showed that LiMn2O4 with a carbon layer had excellent electrochemical performance, which was attributed to the carbon layer avoiding the core material direct contact with the acidic electrolyte and suppression of Mn+ dissolution in...
- Subjects :
- Materials science
Scanning electron microscope
Organic Chemistry
Electrolyte
engineering.material
Electrochemistry
Atomic and Molecular Physics, and Optics
Lithium battery
Coating
Amorphous carbon
Chemical engineering
Transmission electron microscopy
engineering
General Materials Science
Physical and Theoretical Chemistry
Dissolution
Subjects
Details
- ISSN :
- 15364046 and 1536383X
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Fullerenes, Nanotubes and Carbon Nanostructures
- Accession number :
- edsair.doi...........af3ebb131b3a1c1d7e1166f39ab5aa13