| 锂离子电池正极材料 Li2CoxMn1-xSiO4的合成及电化学性能研究 |
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| 引用本文： | 王琳,吕东平,杨勇. 锂离子电池正极材料 Li2CoxMn1-xSiO4的合成及电化学性能研究[J]. 电化学, 2011, 17(3): 318-322. DOI: 10.61558/2993-074X.2847 |
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| 作者姓名： | 王琳 吕东平 杨勇 |
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| 作者单位： | 固体表面物理化学国家重点实验室，厦门大学化学与化工学院，化学系，
福建 厦门361005 |
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| 基金项目： | 国家自然科学基金(20873115); 国家重点基础研究发展规划973课题(2007CB209702)资助 |
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| 摘 要： | 采用水热辅助溶胶凝胶法及球磨包碳技术合成Li2CoxMn1-xSiO4(x=0、 0.1、0.3、0.5、1)与碳纳米管复合材料，X 射线衍射（XRD） 、扫描电镜（SEM）表征复合材料的结构与形貌。用循环伏安（CV） ，交流阻抗（EIS） ，充放电曲线测试材料的电化学性能，并与 Li2MnSiO4/C 和 Li2CoSiO4/C 进行对比。掺钴可以改善Li2MnSiO 4电极的倍率放电性能。
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| 关 键 词： | 锂离子电池 正极材料 正硅酸盐 电化学性能 |
| 收稿时间： | 2011-03-07 |
Synthesis and Electrochemical Behaviors of Li_2Co_xMn_(1-x)SiO_4 as a Cathode Material for Lithium-Ion Batteries |
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| WANG Lin,LV Dong-ping,YANG Yong. Synthesis and Electrochemical Behaviors of Li_2Co_xMn_(1-x)SiO_4 as a Cathode Material for Lithium-Ion Batteries[J]. Electrochemistry, 2011, 17(3): 318-322. DOI: 10.61558/2993-074X.2847 |
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| Authors: | WANG Lin LV Dong-ping YANG Yong |
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| Affiliation: | WANG Lin,LV Dong-ping,YANG Yong(State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China) |
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| Abstract: | We have successfully synthesized Li2CoxMn1-xSiO4/C(x=0,0.1,0.3,0.5,1)/C composites using hydrothermal assisted sol-gel process and ball-milling method.The results of X-ray diffraction show that the solid solutions of Li2CoxMn1-xSiO4 can be achieved when x≤0.3.The initial capacity increases from 70 mAh·g-1 of Li2MnSiO4/C to 105 mAh·g-1 of Li2Co0.3Mn0.7SiO4/C.Cyclic Voltammetry(CV) curves show that the replacement of Mn with Co can reduce the electrochemical polarization,making the insertion-extraction reaction of Li+ much easier.EIS results also prove that Co can decrease the charge transfer impedance of the materials. |
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| Keywords: | Li-ion batttery cathode silicate electrochemical performances |
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