Studies of V doping for the LiFePO4-based Li Ion batteries

Ning, Hua; Wang, Chenyun; Kang, Xueya; Wumair, Tuerdi; Han, Ying

doi:10.1016/j.jallcom.2010.04.233

Cited by 70 publications

(40 citation statements)

References 25 publications

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“…These results clearly indicate that the capacity increase observed after metal doping is due to the residual carbon produced during wet milling using acetone and not by the enhancement of electrical conductivity due to metal doping. This is supported by other works that reported capacity improvement of carbon-coated LiFePO 4 /C with simultaneous metal doping rather than metal doping alone [20][21][22].…”

Section: Resultssupporting

confidence: 80%

The distinct role of transition metal doping for LiFePO4 cathode material

Park

Hwang

et al. 2011

Met. Mater. Int.

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This study addresses the controversial issue of the effect of metal ion doping on the electrochemical performance of LiFePO 4 . Metal doping is claimed to be a possible cause for the capacity improvement of LiFePO 4 as carbon coating. Results obtained inthis study show that dry-milled LiFePO 4 and LiFe 0.9 Cr 0.1 PO 4 deliver 119 mAh g −1 and 101 mAh g −1 , while wet-milled LiFePO 4 and LiFe 0.9 Cr 0.1 PO 4 deliver 149 mAh g −1 and 138 mAh g −1 , respectively. This indicates that the capacity improvement by metal doping is due to the carbonaceous materials produced during fabrication and not by the enhancement of ion diffusion. On the other hand, cycle test results show that metal doping enhances the rate capability at high C-rates by accelerating lithium ion diffusion.

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Section: Resultssupporting

confidence: 80%

The distinct role of transition metal doping for LiFePO4 cathode material

Park

Hwang

et al. 2011

Met. Mater. Int.

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“…In order to overcome these problems, all kinds of methods have been proposed including carboncoating on LiFePO 4 surface [7][8][9][10], cation doping [11][12][13][14][15] and particle size minimization [16][17][18]. Wherein, the carbon-coating and particles size minimization can improve the electrochemical performances of LiFePO 4 due to the increasing electronic conductivity and shortening diffusion length of lithium ions, respectively, however, the carbon addition and small particles size will reduce tap density and energy density [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and electrochemical performances of MoO2 and carbon co-coated LiFePO4 cathode materials

Liu

Yin

Wang

et al. 2014

Ceramics International

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“…Until now, one of the effective ways to increase the electronic conductivity is using carbon coating strategy [13][14][15], realized by introducing an organic precursor in the starting materials.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature behavior of Li3V2(PO4)3/C as cathode material for lithium ion batteries

Liu

Kang

et al. 2011

J Solid State Electrochem

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The electrochemical performance of Li 3 V 2 (PO 4 ) 3 /C was investigated at various low temperatures in the electrolyte 1.0 mol dm −3 LiPF 6 /ethyl carbonate (EC)+diethyl carbonate (DEC)+dimethyl carbonate (DMC) (volume ratio 1:1:1). The stable specific discharge capacity is 125.4, 122.6, 119.3, 116.6, 111.4, and 105.7 mAh g −1 at 26, 10, 0, −10, −20, and −30°C, respectively, in the voltage range of 2.3-4.5 V at 0.2 C rate. When the temperature decreases from −30 to −40°C, there is a rapid decline in the capacity from 105.7 to 69.5 mAh g −1 , implying that there is a nonlinear relationship between the performance and temperature. With temperature decreasing, R ct (corresponding to charge transfer resistance) increases rapidly, D (the lithium ion diffusion coefficients) decreases sharply, and the performance of electrolyte degenerates obviously, illustrating that the lowtemperature electrochemical performance of Li 3 V 2 (PO 4 ) 3 /C is mainly limited by R ct , D Li , and electrolyte.

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Studies of V doping for the LiFePO4-based Li Ion batteries

Cited by 70 publications

References 25 publications

The distinct role of transition metal doping for LiFePO4 cathode material

The distinct role of transition metal doping for LiFePO4 cathode material

Synthesis, characterization and electrochemical performances of MoO2 and carbon co-coated LiFePO4 cathode materials

Low-temperature behavior of Li3V2(PO4)3/C as cathode material for lithium ion batteries

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