Graphene wrapped LiFePO /C composites as cathode materials for Li-ion batteries with enhanced rate capability
Journal of Materials Chemistry, ISSN: 0959-9428, Vol: 22, Issue: 32, Page: 16465-16470
2012
- 221Citations
- 1,555Usage
- 110Captures
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Metrics Details
- Citations221
- Citation Indexes220
- 220
- CrossRef200
- Patent Family Citations1
- Patent Families1
- Usage1,555
- Downloads1,516
- 1,516
- Abstract Views39
- Captures110
- Readers110
- 110
Article Description
To reduce the reaction time, electrical energy consumption, and cost, LiFePO /C/graphene has been synthesized by a rapid, one-pot, microwave-assisted hydrothermal method within 15 min at a temperature of 200 °C, followed by sintering at 600 °C for 2 h under a H /Ar (5:95, v/v) atmosphere. The microstructure and morphology of the LiFePO /C/graphene products were characterized by means of X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy. The carbon coated LiFePO /C nanoparticles, around 200 nm in size, are thoroughly wrapped by crumpled micrometer-size graphene sheets. In this kind of structure, the bridging graphene nanosheets can form an effective conducting network and provide interconnected open pores that favor electrolyte absorption and reduce the diffusion path of the lithium ions. The cyclic voltammograms, charge/discharge profiles, and AC impedance measurements indicated that the kinetics of the LiFePO /C/graphene was better than that of LiFePO /C. The LiFePO /C/graphene composite exhibited a discharge capacity of 165 mA h g at 0.1 C and 88 mA h g at 10 C, respectively. Therefore, the LiFePO /C/graphene composite is a promising candidate for the development of high-performance, cost-effective lithium batteries for the hybrid vehicle and electric vehicle markets. © The Royal Society of Chemistry 2012.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84864230230&origin=inward; http://dx.doi.org/10.1039/c2jm32649c; https://xlink.rsc.org/?DOI=c2jm32649c; https://ro.uow.edu.au/engpapers/5310; https://ro.uow.edu.au/cgi/viewcontent.cgi?article=8242&context=engpapers; https://dx.doi.org/10.1039/c2jm32649c; https://pubs.rsc.org/en/content/articlelanding/2012/jm/c2jm32649c
Royal Society of Chemistry (RSC)
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