Glucose assisted synthesis of hollow spindle LiMnPO4/C nanocomposites for high performance Li-ion batteries

Download
  1. Get@NRC: Glucose assisted synthesis of hollow spindle LiMnPO4/C nanocomposites for high performance Li-ion batteries (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.electacta.2015.07.031
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleElectrochimica Acta
ISSN0013-4686
Volume178
Article number25308
Pages420428; # of pages: 9
SubjectLithium ion battery; lithium manganese phosphate; solution-phased method; low temperature synthesis; dimethyl sulfoxide
AbstractNano-sized hollow spindle LiMnPO4 with a well-developed olivine-type structure was synthesized with the assistance of glucose in dimethyl sulfoxide (DMSO)/H2O under ambient pressure and 108 °C. The scanning electron microscopy (SEM) and transmission electron microscope (TEM) images show that the LiMnPO4 particles consist of hollow spindles with a mean width of 200 nm, length of 500-700 nm, and wall thickness of about 30-60 nm. The LiMnPO4/C nanocomposite was obtained by sintering nano-sized LiMnPO4 with glucose at 650 °C under an inert atmosphere for 4 h. With a coated carbon thickness of about 10 nm, the obtained composite maintained the morphology and size of the hollow spindle. The electrochemical tests show the specific capacity of LiMnPO4/C nanocomposite is 161.8 mAh g-1 at 0.05C, 137.7 mAh g-1 at 0.1C and 110.8 mAh g-1 at 0.2 C. The retention of discharge capacity maintains 92% after 100 cycles at 0.2 C. After different rate cycles the high capacity of the LiMnPO4/C nanocomposite can be recovered. This high performance is attributed to the composite material's hollow spindle structure, which facilitates the electrolyte infiltration, resulting in an increased solid-liquid interface. The carbon layer covering the hollow spindle also contributes to the high performance of the LiMnPO4/C material as the carbon layer improves its electronic conductivity and the nano-scaled wall thickness decreases the paths of Li deintercalation.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number21276941
Export citationExport as RIS
Report a correctionReport a correction
Record identifier0133138d-8119-4d50-865b-de94f557d1a3
Record created2015-11-10
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)