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。
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
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 capacities increase from 70 mAhg-1??? of Li2MnSiO4/C to 105 mAhg-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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