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Nanocomposites LiMnxFe1-xPO4/C synthesized via freeze drying assisted sol-gel routine and their magnetic and electrochemical properties

Journal Article


Abstract


  • Nanocomposites LiMnxFe1-xPO4/C (x = 1, 5/6, 2/3, 1/2) are synthesized by a sol-gel route combined with freeze drying. Fe2+ substituted samples coated by high-ordered carbon have the same olivine structure of LiMnPO4/C but reduced cell volumes. Fe2+ substituting greatly influences magnetic characteristics of LiMnPO4/C and slight amounts of Fe2P impurity in Fe2+ doped samples are verified by magnetic tests. Fe2+ substituted samples exhibit much better electrochemical properties. Among them, LiMn1/2Fe1/2PO4/C displays the best rate capacity and cyclic stability. Its initial discharge capacity reaches 140.1 mAh g−1 and remains at 132.5 mAh g−1 after 100 cycles at 2C, remarkably higher than those of LiMnPO4/C. The superior electrochemical performances are mainly attributed to small charge-transfer impedance, fast Li+ diffusion, residual carbon and existence of Fe2P with excellent electronic conductivity.

Authors


  •   Liu, Liying (external author)
  •   Cao, Zujie (external author)
  •   Cui, Yanyan (external author)
  •   Ke, Xi (external author)
  •   Zeng, Guoxun (external author)
  •   Liu, Jun (external author)
  •   Liu, Dan (external author)
  •   Li, Qinghai (external author)
  •   Lai, Jian (external author)
  •   Shi, Zhicong (external author)
  •   Chou, Shulei

Publication Date


  • 2019

Citation


  • Liu, L., Cao, Z., Cui, Y., Ke, X., Zeng, G., Liu, J., Liu, D., Li, Q., Lai, J., Shi, Z. & Chou, S. (2019). Nanocomposites LiMnxFe1-xPO4/C synthesized via freeze drying assisted sol-gel routine and their magnetic and electrochemical properties. Journal of Alloys and Compounds, 779 339-346.

Scopus Eid


  • 2-s2.0-85057115829

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3367

Number Of Pages


  • 7

Start Page


  • 339

End Page


  • 346

Volume


  • 779

Place Of Publication


  • Netherlands

Abstract


  • Nanocomposites LiMnxFe1-xPO4/C (x = 1, 5/6, 2/3, 1/2) are synthesized by a sol-gel route combined with freeze drying. Fe2+ substituted samples coated by high-ordered carbon have the same olivine structure of LiMnPO4/C but reduced cell volumes. Fe2+ substituting greatly influences magnetic characteristics of LiMnPO4/C and slight amounts of Fe2P impurity in Fe2+ doped samples are verified by magnetic tests. Fe2+ substituted samples exhibit much better electrochemical properties. Among them, LiMn1/2Fe1/2PO4/C displays the best rate capacity and cyclic stability. Its initial discharge capacity reaches 140.1 mAh g−1 and remains at 132.5 mAh g−1 after 100 cycles at 2C, remarkably higher than those of LiMnPO4/C. The superior electrochemical performances are mainly attributed to small charge-transfer impedance, fast Li+ diffusion, residual carbon and existence of Fe2P with excellent electronic conductivity.

Authors


  •   Liu, Liying (external author)
  •   Cao, Zujie (external author)
  •   Cui, Yanyan (external author)
  •   Ke, Xi (external author)
  •   Zeng, Guoxun (external author)
  •   Liu, Jun (external author)
  •   Liu, Dan (external author)
  •   Li, Qinghai (external author)
  •   Lai, Jian (external author)
  •   Shi, Zhicong (external author)
  •   Chou, Shulei

Publication Date


  • 2019

Citation


  • Liu, L., Cao, Z., Cui, Y., Ke, X., Zeng, G., Liu, J., Liu, D., Li, Q., Lai, J., Shi, Z. & Chou, S. (2019). Nanocomposites LiMnxFe1-xPO4/C synthesized via freeze drying assisted sol-gel routine and their magnetic and electrochemical properties. Journal of Alloys and Compounds, 779 339-346.

Scopus Eid


  • 2-s2.0-85057115829

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3367

Number Of Pages


  • 7

Start Page


  • 339

End Page


  • 346

Volume


  • 779

Place Of Publication


  • Netherlands