Electrochemical Properties of SnCo for Anode Material of Li Ion Batteries

리튬 이온 전지 음극 재료용 SnCo의 전기화학적 특성

  • Published : 2002.09.15

Abstract

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.

Keywords

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

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