Electrochemical Performance Research of Mg Ion Doped LiMnPO4/C

Zeng Fu Wei; Wei Su; Shi Nian Liu

doi:10.4028/www.scientific.net/AMR.554-556.365

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 554-556Electrochemical Performance Research of Mg Ion...

Electrochemical Performance Research of Mg Ion Doped LiMnPO₄/C

Abstract:

LiMn_1-xMg_xPO₄/C(x=0, 0.01, 0.04, 0.05, 0.1) were synthesized by using wet-ballmilling and solid-state calcining with phenolic resin as the carbon source. All samples are single phase with a similar morphology, but the cation substitution results in a crystal lattice shrink because of the smaller ionic radii of Mg²⁺, the particles are small and homogeneous. CV, EIS and charge/discharge measurement shows that the Mg substitution leads to a significantly increased reversible capacity due to the enhanced electrochemical kinetics. LiMn_0.96Mg_0.04PO₄/C calcined at 600°C has a discharge capacity of 144mAh/g at 0.05C. When charging-discharging by CC-CV-CC mode at high rates, LiMn_0.96Mg_0.04PO₄/C composite exhibits a good cycle and rate performance.

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Periodical:

Advanced Materials Research (Volumes 554-556)

Pages:

365-368

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.554-556.365

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Online since:

July 2012

Authors:

Zeng Fu Wei*, Wei Su, Shi Nian Liu

Keywords:

LiMnPO₄, Mg Ion Doped, Phenolic Resin, Solid-State Reaction

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