Changes of electro-deposited Sn-Ni alloy thin film for lithium ion battery anodes during charge discharge cycling
Changes of electro-deposited Sn-Ni alloy thin film for lithium ion battery anodes during charge discharge cycling
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DOI：
10.1016/j.jpowsour.2005.03.043
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发表时间：
2005-08-26
影响因子：
9.2
通讯作者：
Osaka, T
中科院分区：
文献类型：
--
作者：
Mukaibo, H;Momma, T;Osaka, T
我们在过去的工作中报道了不同成分的沉积锡镍合金作为锂离子电池负极材料表现出相当大的不同性能，并且性能非常好（约100%）。研究了不同成分的Sn-Ni合金在充放电循环过程中的结构变化，比较了不同成分的Sn-Ni合金在循环性能上的差异。从XRD结果来看，在Sn 62 Ni 38中观察到的主要相是Ni 3Sn 4相，并且证实了其与Li的可逆反应性。我们认为，这是其高容量和延长循环寿命的关键阶段。从显示低容量的Sn 54 Ni 46，仅确认了接近SnNi结构的亚稳相。Sn 84 Ni 16的结果表明纯Sn和富Sn亚稳相的存在将导致相对快速的电极降解。(c)2005 Elsevier B. V.保留所有权利。
We have reported in our past work that dectrodeposited Sn-Ni alloy with different composition show considerably different performance as anode materials for Li-ion batteries, and the performance was remarkably well (ca. 650mAh g(-1) at 70th cycle) when the composition was controlled to Sn62Ni38, In this work, structural changes during charge discharge cycling of Sn-Ni alloy with different composition were investigated to evaluate their differences in the cycle performance. From the XRD result, Ni3Sn4 phase was the main phase seen in Sn62Ni38, and its reversible reactivity with Li was confirmed. We suggest that this is the key phase for its high capacity and lengthened cycle life. From Sn54Ni46, which showed low capacity, only a metastable phase close to the structure of SnNi was confirmed. The results from Sn84Ni16 indicated the presence of pure Sn and Sn rich metastable phase would lead to relatively fast electrode degradation. (c) 2005 Elsevier B.V. All rights reserved.