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Si_(1.18)Co_(0.6)B_(0.6)Zn_(0.12)/MGS复合材料作负极的电化学性能

Electrochemical properties of Si_(1.18)Co_(0.6)B_(0.6)Zn_(0.12)/MGS as anode material for Li-ion batteries
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摘要 以Si、Co、B、Zn和改性石墨球(MGS)为前驱体通过高能球磨制备了一种新的锂离子电池复合负极材料(Si1.18Co0.6B0.6Zn0.12/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。恒电流充放电测试表明,Si1.18Co0.6B0.6Zn0.12/MGS复合材料有较好的电化学性能,最高可逆比容量达565mAh/g,50个循环后,首次可逆容量的保持率为94%。Si1.18Co0.6B0.6Zn0.12/MGS电化学性能的改善应归因于电极结构在循环过程中的稳定性。 New Si1.18Co0.6B0.6Zn0.12/MGS was prepared by high energy ball milling (HEBM) using nano-Si, Co, B, Zn and modified graphite sphere (MGS) as precursors. The compositions and morphology of the composite material were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The constant current charge-discharge technique indicates that Si1.18Co0.6B0.6Zn0.12/MGS exhibits obviously improved cyclic performance. The highest reversible capacity of Si1.18Co0.6B0.6Zn0.12/MGS is 565 mAh/g. The first reversible capacity retention is 94% in the tested 50 cycles. The improvement of Si1.18Co0.6B0.6Zn0.12/MGS in electrochemical performance mainly comes from the stability of electrode structure.
作者 李明齐
出处 《电源技术》 CAS CSCD 北大核心 2010年第6期543-545,共3页 Chinese Journal of Power Sources
基金 四川省教育厅项目(09ZB090) 西华师大启动项目(09B005)
关键词 Si1.18Co0.6B0.6Zn0.12/MGS 复合材料 阳极 锂离子电池 电化学性能 Si1.18Co0.6B0.6Zn0.12/MGS composite materials anode Li-ion batteries electrochemical property
作者简介 作者简介:李明齐(1970—),男,四川省人,副教授,博士。主要研究方向为电化学。
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参考文献14

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