An initial specific dischargecapacity of 153 mAhg−1 and a specific discharge capacity of 128.4 mAhg−1 after the 8thcharge/discharge cycling at 1C is recorded.
📌 3 Key Takeaways
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Objective & Hypothesis:We synthesized Nb-doped LiFePO4/C nano composite cathode materials bymechanochemical activation followed by a single step calcination.
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Key Findings & Data:The startingchemicals of Li2CO3, FeC2O4.2H2O, NH4H2.PO4and C6H8O7as lithium, iron,phosphate, and carbon sources are mixed in a high energy ball mill (250 rpm, 5h)and calcined at 650 °C and 10 hours.
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Conclusion & Impact:An initial specific dischargecapacity of 153 mAhg−1 and a specific discharge capacity of 128.4 mAhg−1 after the 8thcharge/discharge cycling at 1C is recorded.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters
Abstract
We synthesized Nb-doped LiFePO4/C nano composite cathode materials bymechanochemical activation followed by a single step calcination. The startingchemicals of Li2CO3, FeC2O4.2H2O, NH4H2.PO4and C6H8O7as lithium, iron,phosphate, and carbon sources are mixed in a high energy ball mill (250 rpm, 5h)and calcined at 650 °C and 10 hours. The resultant materials are structurally (XRD,SEM, TEM) and electrochemically characterized and high purity LiFePO4with highelectrochemical performance is obtained. Voltage vs. specific capacity, discharge capacityvs. cycle number in manufactured battery is presented. An initial specific dischargecapacity of 153 mAhg−1 and a specific discharge capacity of 128.4 mAhg−1 after the 8thcharge/discharge cycling at 1C is recorded.
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Cite This Article
AKYILDIZ, Ö., BAĞCI, C. (2022). Synthesis, characterization and electrochemical performance of Nb doped LiFePO4/C cathodes. Hittite Journal of Science and Engineering, Cilt: 5 - Sayı: 1, 49–55. https://ajindex.com/articles/538034
Xie G, Zhu H-J, Liu X-M, and Yang H. A core–shell LiFePO4/C nanocomposite prepared via a sol–gel method assisted by citric acid. Journal of Alloys and Compounds 574 (2013) 155–160
Johnson ID, Blagovidova E, Dingwall PA, Brett DJL, Shearing PR. Darr JA. High power Nb-doped LiFePO4 Li-ion battery cathodes; pilot-scale synthesis and electrochemical properties. Journal of Power Sources 326 (2016) 476e481 3. Toprakci O, Toprakci HAK, Ji L, Zhang X. Fabrication and electrochemical characteristics of LiFePO4 powders for lithium-ion batteries. Kona Powder and Particle Journal 28 (2010) 50-72
Franger S, Cras FL, Bourbon C, Rouault H. Comparison between different LiFePO4 synthesis routes and their influence on its physico-chemical properties. Journal of Power Sources 119–121 (1) (2003) 252–257
Franger S, Benoit C, Bourbon C, Cras FL. Chemistry and electrochemistry of composite LiFePO4 materials for secondary lithium batteries. Journal of Physics and Chemistry of Solids. 67 (5-6) (2006) 1338–1342
Park CK, Hwang JT, Cho WI and Jang H. The origin of the residual carbon in LiFePO4 synthesized by wet milling. Bull Korean Chem Soc. 32 (2) (2011) 536-540
Shin HC, Park SB, Jang H, Chung KY, Cho WI, Kim CS, Cho BW. rate performance and structural change of cr-doped LiFePO4/C during cycling. Electrochemica Acta 53 (2008) 7946–7951
Li C, Hua N, Wang C, Kang X. Effect of Mn2+ doping in LiFePO4 and the low temperature electrochemical performances. Journal of Alloys and Compounds 509 (2011) 1897–1900
Park CK, Park SB, Park CH, Shin HC, Cho WI and Jang H. The root cause of the rate performance improvement after metal doping: a case study of LiFePO4. Bull Korean Chem Soc. 32 (3) (2011) 921-926
Ma Z, Shao G, Wang G, Zhang Y and Du J. Effects of Nbdoped on the structure and electrochemical performance of LiFePO4/C composites. Journal of Solid State Chemistry 210 (1) (2014) 232–237
Zhang, Q, Wang S, Zhou Z, Ma G, Jiang W, Guo X, Zhao S. Structural and electrochemical properties of Nd-doped LiFePO4/C prepared without using inert gas. Solid State Ionics 191 (2011) 40–44
Zhuang D, Zhao X, Xie J, Tu J, Zhu T, Cao G. One-step Solidstate Synthesis and Electrochemical Performance of Nbdoped LiFePO4/C. ActaPhys.Chim.Sin. 22 (2006) 840–844
Morales J, Trócoli R, Rodríguez-Castellón E, Franger S, Santos-Peña J. Effect of C and Au additives produced by simple coaters on the surface and the electrochemical properties of nanosized LiFePO4. Journal