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Nano-sized cathode material LiMn0.5Fe0.5PO4/C synthesized via improved sol-gel routine and its magnetic and electrochemical properties
- Source :
- Electrochimica Acta. 255:205-211
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Cathode materials LiMn 0.5 Fe 0.5 PO 4 /C and LiMnPO 4 /C were synthesized by a high-energy ball-milling assisted sol-gel method. The LiMn 0.5 Fe 0.5 PO 4 consists of nanorods and nanoparticles homogeneously wrapped with highly ordering carbon. The increased Neel-temperature and decreased effective magnetic moment of LiMn 0.5 Fe 0.5 PO 4 /C revealed the microstructure differences from LiMnPO 4 /C. Meanwhile, tiny amount of ferromagnetic impurities is detected in LiMn 0.5 Fe 0.5 PO 4 /C by magnetic tests. The synergetic effects of Fe substitution and carbon coating remarkably improve rate capacity and cyclic stability of LiMn 0.5 Fe 0.5 PO 4 /C. This solid solution delivers initial discharge capacities of 128.6 mAh g −1 and 116.3 mAh g −1 and capacity retentions of 93.5% and 90.3% after 100 cycles at 1C and 2C respectively, significantly better than LiMnPO 4 /C.
- Subjects :
- Materials science
General Chemical Engineering
Inorganic chemistry
Nanoparticle
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
Microstructure
01 natural sciences
Cathode
0104 chemical sciences
law.invention
Chemical engineering
Impurity
law
Nanorod
0210 nano-technology
Sol-gel
Solid solution
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 255
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi...........fd60cfc263eaa44970ebda1d7d45735c