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Effects of Mg2+ and Ti4+ Doping on Performance of LiFePO4 for Lithium-Ion Batteries

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Abstract:

Stoichiometric Mg2+ and Ti4+ with different proportions were doped to prepare the LiFe1-x-yMgxTiyPO4 cathode materials by high temperature solid state method. The samples were investigated with XRD, SEM and charge/discharge measurements. Results show that doping of Mg2+ and Ti4+ distinctly changes the paticle sizes and morphologies, which leads to a improvement of electrochemical performance. The mix-doped LiFe0.98Mg0.01Ti0.01PO4 material shows the best electrochemical performance due to its smaller crystalline particles and lower the polarization. At the discharge rate of 0.1C, the initial specific capacity of LiFe0.98Mg0.01Ti0.01PO4 is 105.78 mAh·g-1, its high-rate performance is also better.

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Periodical:

Advanced Materials Research (Volume 815)

Pages:

423-426

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.815.423

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Online since:

October 2013

Authors:

Xiao Peng Huang, Chao Yang, Yao Chun Yao

Keywords:

Cathode Material, LiFePO4, Lithium-Ion Battery, Ons Doping

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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