Electrochemical Properties of SnCo for Anode Material of Li Ion Batteries

리튬 이온 전지 음극 재료용 SnCo의 전기화학적 특성

  • Published : 2002.09.15


SnCo alloy powder prepared by high energy ball milling is examined as an anode material for lithium-ion batteries. As the ball-milling time increased, the crystallinity of SnCo decreased. XRD and TEM SADP showed that nanocrystalline and amorphous phase coexisted after 16 h ball-milling. As the crystallinity decreased, the cycleability increased. At first cycle, there are 4 plateau potentials. The observation of voltage plateau at about 0.68 V confirms the formation of Sn-Li alloy and Co metal. It is considered that The plateau potentials below 0.68 V were reaction between Li and Sn. The change of chemical diffusion coefficient showed that the structure of SnCo alloy abruptly changed at first cycle, and maintained after 2nd cycle.


SnCo;Ball-milling;Chemical Diffusion Coefficient;Amorphous phaser


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