| 焦磷酸钒锂的合成及其性能 |
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| 引用本文： | 徐土根,周霄霄,龚建杭,王祎丽. 焦磷酸钒锂的合成及其性能[J]. 杭州师范大学学报(自然科学版), 2012, 0(5): 416-419 |
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| 作者姓名： | 徐土根 周霄霄 龚建杭 王祎丽 |
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| 作者单位： | 杭州师范大学材料与化学化工学院 |
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| 基金项目： | 杭州师范大学攀登工程项目(PD11002008002008) |
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| 摘 要： | 用溶胶-凝胶法合成了焦磷酸钒锂(LiVP2O7)锂电池正极材料,XRD显示该材料属于单斜晶体结构(P21空间群),晶胞参数为a=4.804,b=8.113,c=6.939,β=109.01°,SEM测试表明该材料的粒径大约在500nm-1μm之间,分散性好.该材料首次放电容量达到91mAh.g-1,首次充放电库仑效率在93%以上,46周循环后,放电容量仍能保持在82mAh.g-1,显示出良好的循环稳定性和可逆性.
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| 关 键 词： | 焦磷酸钒锂 正极材料 锂离子电池 溶胶-凝胶法 电化学 |
The Synthesis and Properties of LiVP2O7 |
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| XU Tu-gen,ZHOU Xiao-xiao,GONG Jian-hang,Wang Yi-li. The Synthesis and Properties of LiVP2O7[J]. , 2012, 0(5): 416-419 |
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| Authors: | XU Tu-gen ZHOU Xiao-xiao GONG Jian-hang Wang Yi-li |
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| Affiliation: | (College of Materials and Chemical Engineering,Hangzhou Normal University,Hangzhou 310036,China) |
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| Abstract: | The cathode material for lithium-ion battery with lithium vanadium pyrophosphate(LiVP2O7) was synthesized by the sol-gel method.XRD showed the material belonged to a monoclinic structure with lattice parameters a=4.804,b=8.113,c=6.939,β=109.01°(P21 space group).SEM test showed that the particles of the material were evenly distributed with the sizes of 500nm-1μm.The first discharge capacity of the material reached 91mAh·g-1 and the first columbic efficiency was over 93%.After 46 cycles,the discharge capacity still remained over 82mAh·g-1,which indicated the good cycle capability and reversibility. |
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| Keywords: | LiVP2O7 cathode material lithium-ion battery sol-gel method electrical chemistry |
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