Preparation of $ LiFe_{0.98} $$ M_{0.02} $$ PO_{4} $/C cathode material for lithium-ion battery
Abstract The $ LiFe_{0.98} $$ M_{0.02} $$ PO_{4} $/C (M = Ni, V, and Mn) composite materials were synthesized by solid state reaction using $ Fe_{2} $$ O_{3} $ as a mixed iron source and citric acid as a carbon source. The crystal structure features and particle morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The electrochemical properties of samples were characterized by charge-discharge testing, cyclic voltammetry (CV), and electrochemical impedance spectra (EIS). It is found that $ Ni^{2+} $, $ V^{5+} $, and $ Mn^{2+} $ doping do not destroy the olivine structure of $ LiFePO_{4} $/C but can stabilize the crystal structure and decrease average particle size. Electrochemical test results indicate $ Ni^{2+} $ and $ V^{5+} $ doping decrease charge transfer resistance and enhance $ Li^{+} $ ion diffusion velocity and thus improve cycling and high-rate capability of the $ LiFePO_{4} $/C. Especially, the $ LiFe_{0.98} $$ V_{0.02} $$ PO_{4} $/C shows the best cycling stability and rate capability among all the doped samples. The maximum discharge capacities of $ LiFe_{0.98} $$ V_{0.02} $$ PO_{4} $/C at 0.1, 0.2, 0.5, 1.0, and 2.0C are 152, 140.9, 130.3, 119.8, and 105.9 mAh/g, respectively,which are significantly higher than other samples..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2014 |
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| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:21 |
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| Enthalten in: |
Ionics - 21(2014), 2 vom: 21. Nov., Seite 319-324 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Guowei [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
| Anmerkungen: |
© Springer-Verlag Berlin Heidelberg 2014 |
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| doi: |
10.1007/s11581-014-1308-8 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
OLC2087619727 |
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| 100 | 1 | |a Zhang, Guowei |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Preparation of $ LiFe_{0.98} $$ M_{0.02} $$ PO_{4} $/C cathode material for lithium-ion battery |
| 264 | 1 | |c 2014 | |
| 336 | |a Text |b txt |2 rdacontent | ||
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| 500 | |a © Springer-Verlag Berlin Heidelberg 2014 | ||
| 520 | |a Abstract The $ LiFe_{0.98} $$ M_{0.02} $$ PO_{4} $/C (M = Ni, V, and Mn) composite materials were synthesized by solid state reaction using $ Fe_{2} $$ O_{3} $ as a mixed iron source and citric acid as a carbon source. The crystal structure features and particle morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The electrochemical properties of samples were characterized by charge-discharge testing, cyclic voltammetry (CV), and electrochemical impedance spectra (EIS). It is found that $ Ni^{2+} $, $ V^{5+} $, and $ Mn^{2+} $ doping do not destroy the olivine structure of $ LiFePO_{4} $/C but can stabilize the crystal structure and decrease average particle size. Electrochemical test results indicate $ Ni^{2+} $ and $ V^{5+} $ doping decrease charge transfer resistance and enhance $ Li^{+} $ ion diffusion velocity and thus improve cycling and high-rate capability of the $ LiFePO_{4} $/C. Especially, the $ LiFe_{0.98} $$ V_{0.02} $$ PO_{4} $/C shows the best cycling stability and rate capability among all the doped samples. The maximum discharge capacities of $ LiFe_{0.98} $$ V_{0.02} $$ PO_{4} $/C at 0.1, 0.2, 0.5, 1.0, and 2.0C are 152, 140.9, 130.3, 119.8, and 105.9 mAh/g, respectively,which are significantly higher than other samples. | ||
| 650 | 4 | |a Doping | |
| 650 | 4 | |a Coating | |
| 650 | 4 | |a Lithium ferrous phosphate | |
| 650 | 4 | |a Lithium-ion battery | |
| 700 | 1 | |a Han, Enshan |4 aut | |
| 700 | 1 | |a Zhu, Lingzhi |4 aut | |
| 700 | 1 | |a Jing, Qiming |4 aut | |
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| 773 | 1 | 8 | |g volume:21 |g year:2014 |g number:2 |g day:21 |g month:11 |g pages:319-324 |
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