| 锂离子电池负极合金CoSn和Cu-Sn的制备与表征 |
| Synthesis and Characteristics of CoSn and Cu-Sn Alloys as Anode Materials in Lithium-Ion Cell |
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| 摘要: |
| 关键词: CoSn合金 Cu-Sn 锂离子电池 恒流充放电 |
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| Abstract: CoSn alloy and Cu-Sn samples were synthesized by H2-reduction following solid-state reaction between Co(Ⅱ)， Cu(Ⅱ)， Sn(Ⅳ) and NaOH at ambient temperature. The samples were characterized by XRD， SEM. The results showed that CoSn alloy (80～200nm) is globe-shaped， ultrafine hexagonal material， and Cu-Sn alloy powder consists of two phases， i.e. Cu6Sn5 and Cu3Sn. Cu-Sn powder has spherical morphology and the particle size is estimated to be 60～70nm. The electrochemical performances of CoSn alloy and Cu-Sn powder were studied using lithium-ions model cell Li/LiPF6 (EC+DMC)/CoSn (or Cu-Sn). It was demonstrated the reversible discharge capacities for 10 cycles keep above 280mAh·g-1 for nanophase Cu-Sn， and 60mAh·g-1 for CoSn alloy. Differ-ential capacity plots showed that the reaction mechanisms of Cu-Sn with lithium were reversible. |
| Keywords: CoSn alloy Cu-Sn lithium-ion cell galvanostatic charge/discharge |
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| 米常焕,张校刚,曹高邵.锂离子电池负极合金CoSn和Cu-Sn的制备与表征[J].无机化学学报,2003,19(3):283-286. |
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