Highly ordered LiFePO4 cathode material for Li-ion batteries templated by surfactant-modified polystyrene colloidal crystals

Download
  1. (PDF, 814 KB)
  2. (PDF, 963 KB)
  3. Get@NRC: Highly ordered LiFePO4 cathode material for Li-ion batteries templated by surfactant-modified polystyrene colloidal crystals (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2012.01.042
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Power Sources
Volume205
Pages414419; # of pages: 6
SubjectLiFePO4; Li-ion battery; cathode material; three-dimensionally ordered macroporous structure; organic template assisted synthesis
AbstractAn organic template assisted synthesis was developed to obtain highly ordered porous LiFePO4 cathode material. The developed synthesis enabled the use of polystyrene (PS) as template by modifying its surface with a surfactant (Brij 78) to render it hydrophilic. The material was synthesized in high yield and purity as confirmed by X-ray powder diffraction. The TEM and SEM images clearly confirmed the presence of a highly ordered porous structure and the latter showed that the structure has an average pore diameter of 400 nm and a wall thickness and depth of ~100 nm. Thermal scans and elemental analysis showed that the material contains a high amount of carbon reaching 23-28% by weight. The surface area was calculated using the BET method and found to be 7.71m(to the power of 2)g(to the power of-1). Li/LiFePO4 half cells were tested and gave satisfactory discharge capacities; an initial capacity [158mAhg(to the power of -1)] close to the theoretical value and recoverable capacities at high C-rates (2-5 C).
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number53048
NPARC number19554418
Export citationExport as RIS
Report a correctionReport a correction
Record identifierf44190dc-f6a7-4320-b781-44460cccee7f
Record created2012-02-24
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)