Synthesis and Electrochemical Properties of Carbon-Mixed LiEr0.02Fe0.98PO4 Cathode Material for Lithium-ion Batteries

GÖKTEPE H., Sahan H., ÜLGEN A., PATAT Ş.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, cilt.27, sa.9, ss.861-864, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 9
  • Basım Tarihi: 2011
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.861-864
  • Anahtar Kelimeler: LiFePO4, Cathode, Erbium doping, Lithium batteries, LIFEPO4, PERFORMANCE
  • Erciyes Üniversitesi Adresli: Evet

Özet

LiEr0.02Fe0.98PO4/C composite cathode was synthesized by a simple solution method with polyethylene glycol (PEG) as the reductive agent and carbon source. The effect of erbium doping on the electrochemical behavior of LiFePO4 was studied in this paper. The samples were characterized by X-ray powder diffraction and scanning electron microscopy and the electrochemical properties were investigated by the charge-discharge test. An initial discharge capacity of 149 mAh.g(-1) was achieved for the LiEr0.02Fe0.98PO4/C composite cathode with a rate of 0.1 C. The electronic conductivity of Er doped LiFePO4/C was measured as 10(-2) S.cm(-1). The results indicated that erbium doping did not destroy the lattice structure of LiFePO4 and enlarge the lattice volume. These changes are beneficial to the improvement of the electrochemical performance of the LiFePO4 cathode.