LiVOPO4: A cathode material for 4 V lithium ion batteries
LiVOPO4: A cathode material for 4 V lithium ion batteries
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DOI：
10.1016/j.jpowsour.2008.07.092
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发表时间：
2009-04
影响因子：
9.2
通讯作者：
M. Ren;Zhen Zhou;Liwei Su;X. P. Gao
中科院分区：
文献类型：
--
作者：
M. Ren;Zhen Zhou;Liwei Su;X. P. Gao
采用溶胶-凝胶法合成了电活性磷酸氧钒锂（β-LiVOPO 4），并在β-LiVOPO 4颗粒网络中加入RuCl 3，制备了β-LiVOPO 4/RuO 2复合材料。X射线衍射分析表明，β-LiVOPO 4具有正交晶系结构，空间群为Pnma。能量色散X射线能谱分析表明，钌在β-LiVOPO 4颗粒中均匀分布。与纯β-LiVOPO 4相比，β-LiVOPO 4/RuO 2复合材料具有更好的电化学嵌锂性能，这是由于其导电性和锂离子扩散能力的增强。如果能通过切实可行的方法提高β-LiVOPO 4的电导率，则其在高压锂离子电池中具有应用前景。
Electroactive lithium vanadyl phosphate, β-LiVOPO4, was synthesized via a sol–gel route, and β-LiVOPO4/RuO2composite was subsequently prepared by heating RuCl3in the network of β-LiVOPO4particles. X-ray diffraction patterns showed that β-LiVOPO4has an orthorhombic structure with space group of Pnma. Energy dispersive X-ray spectroscopy dot mappings revealed that ruthenium was homogeneously distributed among β-LiVOPO4particles. Compared with pristine β-LiVOPO4, β-LiVOPO4/RuO2composite presented better electrochemical Li ion intercalation performances due to the enhanced electrical conductivity and Li ion diffusion. β-LiVOPO4may be prospective for the application to high-voltage Li ion batteries if the electrical conductivity is improved through a practical way.