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锂离子电池Si_(1.81)Co_(0.6)Cr_(0.6)Zn_(0.2)/MGS复合负极材料的制备与性能

Preparation and electrochemical properties of Si_(1.81)Co_(0.6)Cr_(0.6)Zn_(0.2)/MGS/MGS as anode material for Li-ion batteries
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摘要 采用两步高能球磨法制备了一种新的锂离子电池硅基复合负极材料Si1.81Co0.6Cr0.6Zn0.2/MGS.用X射线衍射(XRD)和扫描电镜(SEM)表征了材料的组成和形貌结构.电化学测试表明,Si1.81Co0.6Cr0.6Zn0.2/MGS作锂离子电池负极材料有较好的电化学性能:首次可逆容量为561 mAh.g-1,50个循环后,可逆容量的保持率为91%.Si1.81Co0.6Cr0.6Zn0.2/MGS循环性能的改善归因于电极结构在循环过程中的稳定性. A new Si-based composite material（Si1.81Co0.6Cr0.6Zn0.2/MGS） as anode for lithium-ion batteries was prepared by two-step high energy ball milling（HEBM） technique.X-ray diffraction（XRD） and scanning electron microscope（SEM） were used to examine the compositions and morphology of the composite material.Electrochemical measurement indicates that Si1.81Co0.6Cr0.6Zn0.2/MGS displays good electrochemical properties.The initial reversible capacity is 561 mAh·g-1 and 91% of it may be maintained after 50 cycles.The improvement of Si1.81Co0.6Cr0.6Zn0.2/MGS in cycle performance should be attributed to the structural stability of electrode.
作者 李明齐
机构地区 西华师范大学化学化工学院
出处 《吉林化工学院学报》 CAS 2010年第2期10-13,共4页 Journal of Jilin Institute of Chemical Technology
基金 国家科技部重大项目(No.2006CB932703) 四川省教育厅项目(09ZB090)
关键词 Si1.81Co0.6Cr0.6Zn0.2/MGS 复合材料 负极 锂离子电池 电化学性能 Si1.81Co0.6Cr0.6Zn0.2/MGS composite material anode Lithium-ion batteries electrochemical property
分类号 TB33 [一般工业技术—材料科学与工程]
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参考文献9

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吉林化工学院学报
2010年 第2期

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