Significantly Improved Electrochemical Performance in Li3V2(PO4)3/C Promoted by SiO2 Coating for Lithium-Ion Batteries

Li3V2(PO4)3/C (LVP/C) coated with various amounts of SiO2 has been synthesized, and the effect of surface modification by SiO2 on the performance of LVP has been systematically investigated with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), magnetic susceptibility, Raman spectroscopy, and electrochemical measurements. Based on the analysis of XRD, XPS, and TEM, it is confirmed that SiO2 coating on the surface of LVP particles does not change the monoclinic structure of LVP. The XAS, XPS, and magnetic susceptibility results indicate that the valence of V in both the pristine and SiO2-coated LVP are close to +3. Furthermore, our results reveal that the electrochemical performance of LVP/C can be significantly improved by the SiO2 coating, which is due to the enhanced structural stability and reduced charge-transfer resistance.

[1]  Jian-qing Zhang,et al.  Effects of the nanostructured SiO2 coating on the performance of LiNi0.5Mn1.5O4 cathode materials for high-voltage Li-ion batteries , 2007 .

[2]  Yongli Gao,et al.  Effects of Ti and Mg Codoping on the Electrochemical Performance of Li3V2(PO4)3 Cathode Material for Lithium Ion Batteries , 2011 .

[3]  Zhen Zhou,et al.  Preparation and electrochemical studies of Fe-doped Li3V2(PO4)3 cathode materials for lithium-ion batteries , 2006 .

[4]  J. Barker,et al.  Electrochemical Properties of Lithium Vanadium Phosphate as a Cathode Material for Lithium-Ion Batteries , 2002 .

[5]  U. Heider,et al.  Challenge in manufacturing electrolyte solutions for lithium and lithium ion batteries quality control and minimizing contamination level , 1999 .

[6]  Jiangfeng Xiang,et al.  Hydrothermal synthesis of carbon-coated lithium vanadium phosphate , 2008 .

[7]  X. Ouyang,et al.  Synthesis and electrochemical performance of La-doped Li3V2−xLax(PO4)3 cathode materials for lithium batteries , 2011 .

[8]  Yunhui Huang,et al.  High-performance Li3V2(PO4)3/C cathode materials prepared via a sol–gel route with double carbon sources , 2012 .

[9]  J. Tu,et al.  Synthesis of plate-like Li3V2(PO4)3/C as a cathode material for Li-ion batteries , 2011 .

[10]  I-Ming Hung,et al.  Effect of Vanadium Incorporation on Electrochemical Performance of LiFePO4 for Lithium-Ion Batteries , 2011 .

[11]  J. Tu,et al.  Electrochemical performance of carbon-coated Li3V2(PO4)3 cathode materials derived from polystyrene-based carbon-thermal reduction synthesis , 2010 .

[12]  Q. Kuang,et al.  Synthesis and electrochemical properties of Co-doped Li3V2(PO4)3 cathode materials for lithium-ion batteries , 2010 .

[13]  Yanming Zhao,et al.  Synthesis of Li3V2(PO4)3 with high performance by optimized solid-state synthesis routine , 2006 .

[14]  M. Zhao,et al.  Effect of MgO nanolayer coated on Li3V2(PO4)3/C cathode material for lithium-ion battery , 2010 .

[15]  Yu Zhou,et al.  Synthesis and electrochemical performances of Li3V2(PO4)3/(Ag + C) composite cathode , 2010 .

[16]  J. Barker,et al.  Experimental and computational study of the structure and electrochemical properties of monoclinic LixM2(PO4)3 compounds , 2003 .

[17]  J. Barker,et al.  Performance characteristics of lithium vanadium phosphate as a cathode material for lithium-ion batteries , 2003 .

[18]  Changsong Dai,et al.  Synthesis and performance of Li3(V1−xMgx)2(PO4)3 cathode materials , 2010 .

[19]  Rita Baddour-Hadjean,et al.  Raman microspectrometry applied to the study of electrode materials for lithium batteries. , 2010, Chemical reviews.

[20]  Yufeng Tang,et al.  Synthesis and characterization of Li3V(2 − 2x/3)Mgx(PO4)3/C cathode material for lithium-ion batteries , 2010 .

[21]  Zhen Zhou,et al.  Li ion battery materials with core-shell nanostructures. , 2011, Nanoscale.

[22]  Youzhong Dong,et al.  Preparation and electrochemical performance studies on Cr-doped Li3V2(PO4)3 as cathode materials for lithium-ion batteries , 2009 .

[23]  Chusheng Chen,et al.  A comparative study on the low-temperature performance of LiFePO4/C and Li3V2(PO4)(3)/C cathodes for lithium-ion batteries , 2011 .

[24]  S. Ferrari,et al.  Mn influence on the electrochemical behaviour of Li 3V 2(PO 4) 3 cathode material , 2011 .

[25]  Zhiyong Liang,et al.  Synthesis and electrochemical properties of Na-doped Li3V2(PO4)3 cathode materials for Li-ion batteries , 2011 .

[26]  Nikolai Uvarov,et al.  Electrochemical behavior of Li3−xM′xV2−yM″y(PO4)3 (M′ = K, M″ = Sc, Mg + Ti)/C composite cathode material for lithium-ion batteries , 2011 .

[27]  M. Morcrette,et al.  A comparative structural and electrochemical study of monoclinic Li3Fe2(PO4)3 and Li3V2(PO4)3 , 2003 .

[28]  Kaiyu Liu,et al.  Aluminothermal synthesis and characterization of Li3V2−xAlx(PO4)3 cathode materials for lithium ion batteries , 2011 .

[29]  Yonglang Guo,et al.  Effect of reduction agent on the performance of Li3V2(PO4)3/C positive material by one-step solid-state reaction , 2009 .

[30]  Ji‐Guang Zhang,et al.  Nano-Structured Li3V2(PO4)3 /Carbon Composite for High Rate Lithium Ion Batteries , 2010 .

[31]  Yunhui Huang,et al.  Improved Electrochemical Performance in Li3V2(PO4)3 Promoted by Niobium-Incorporation , 2011 .

[32]  Baohua Li,et al.  Electrochemical performance of SiO2-coated LiFePO4 cathode materials for lithium ion battery , 2011 .

[33]  Xueping Gao,et al.  Electrochemical performance of nanocrystalline Li3V2(PO4)3/carbon composite material synthesized by a novel sol–gel method , 2006 .

[34]  Xueping Gao,et al.  Core−Shell Li3V2(PO4)3@C Composites as Cathode Materials for Lithium-Ion Batteries , 2008 .

[35]  L. Nazar,et al.  Nanostructured Composites: A High Capacity, Fast Rate Li3V2(PO4)3/Carbon Cathode for Rechargeable Lithium Batteries , 2002 .

[36]  G. P. Kalaignan,et al.  Synthesis and electrochemical characterizations of Nano-SiO2-coated LiMn2O4 cathode materials for rechargeable lithium batteries , 2008 .

[37]  X. Tao,et al.  Synthesis and electrochemical properties of Nb-doped Li3V2(PO4)3/C cathode materials for lithium-ion batteries , 2011 .