High-performing Sn-Co nanowire electrodes as anodes for lithium-ion batteries

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• 作者：Germano Ferrara^a ; Catia Arbizzani^b ; Libero Damen^b ; Martina Guidotti^b ; Mariachiara Lazzari^b ; Francesco Gioacchino Vergottini^c ; Rosalinda Inguanta^c ; Salvatore Piazza^c ; Carmelo Sunseri^c ; Marina Mastragostino^b ; ^{marina.mastragostino@unibo.it}
• 关键词：Tin ; Tin&ndash ; cobalt alloy ; Nanowire ; Anode ; Vinylene carbonate additive ; Li-ion batteries
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：1 August, 2012
• 卷：211
• 期：Complete
• 页码：103-107
• 文件大小：872 K

摘要

The preparation of Sn₂Co₃ nanowire arrays (NWs) electrogrown inside the channels of polycarbonate membranes and their characterization as anodes for Li-ion batteries both in half-cell vs. Li and in battery configuration are reported. The Sn₂Co₃ NW electrodes tested by deep galvanostatic charge/discharge cycles in ethylene carbonate-dimethylcarbonate (1:1) - LiPF₆ 1聽M displayed 80%capacity retention after 200 cycles at C/2 and 30聽掳C, and a high charge and discharge rate capability at C-rate from C/3 (0.33聽A/g) to 10C (10聽A/g) at 30掳 and 10聽掳C. Electrodes with the highest alloy loading delivered up to 0.6聽mAh聽cm^鈭? at C/2.

The performance of these electrodes in battery configuration with LiFePO₄ as cathode is also reported, as well as the effect of the vinylene carbonate additive on the charge/discharge coulombic efficiency of the Sn₂Co₃ NWs.