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Enhanced electrochemical performance of carbon-LiMn1-xFexPO4 nanocomposite cathode for lithium-ion batteries
- Authors
- Oh, Seung-Min; Jung, Hun-Gi; Yoon, Chong Seung; Myung, Seung-Taek; Chen, Zonghai; Amine, Khalil; Sun, Yang-Kook
- Issue Date
- Aug-2011
- Publisher
- Elsevier BV
- Keywords
- Carbon coating; Olivine; Iron doping; Nanocomposite; Lithium battery
- Citation
- Journal of Power Sources, v.196, no.16, pp 6924 - 6928
- Pages
- 5
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- Journal of Power Sources
- Volume
- 196
- Number
- 16
- Start Page
- 6924
- End Page
- 6928
- ISSN
- 0378-7753
1873-2755
- Abstract
- 4V-class olivine C-LiMn1-xFexPO4 (x = 0 and 0.15) are synthesized by ultrasonic pyrolysis followed by ball milling with AB carbon to evaluate the doping effect of iron. The C-LiMn0.85Fe0.15PO4 shows excellent rate capability having discharge capacity of 150 mAh g(-1) at 0.5C-rate and 121 mAh g(-1) at 2C-rate. The capacity retention of the C-LiMn0.85Fe0.15PO4 is 91% after 50 cycles at 55 degrees C whereas C-LiMnPO4 is limited to 87%. The improved electrochemical performance of the C-LiMn0.85Fe0.15PO4 electrode is attributed to the enhanced electrical conductivity caused by tighter binding on the carbon particles with the LiMn0.85Fe0.15PO4 primary particles as well as by the surface coating of carbon on the primary particles.
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Related Researcher
- Yoon, Chong Seung
- COLLEGE OF ENGINEERING (SCHOOL OF MATERIALS SCIENCE AND ENGINEERING)