Microstructure and electrochemical properties of a nanometer-scale tin anode for lithium secondary batteries
Microstructure and electrochemical properties of a nanometer-scale tin anode for lithium secondary batteries
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DOI：
10.1016/j.jpowsour.2004.05.026
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发表时间：
2004-09
影响因子：
9.2
通讯作者：
Wanuk Choi;J. Y. Lee;B. Jung;H. Lim
中科院分区：
文献类型：
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作者：
Wanuk Choi;J. Y. Lee;B. Jung;H. Lim
采用透射电镜（TEM）研究了不同插锂状态下丝爆法制备的纳米级锡粉的微观结构，并通过恒流充放电实验对锡粉电极的电化学性能进行了表征。在插入锂的过程中形成了几种Li/Sn金属间化合物，即Li1−xSn、l13sn5和Li7Sn2。在有机电解质电化学电池中循环的颗粒表面的钝化层（或固体电解质界面，SEI）通过FT-IR光谱表征为li2co3和ROCO2Li。钝化层的大部分是无定形的，但有一小部分结晶不良。
The microstructure of nanometer-scale tin powder synthesized by the wire electric explosion (WEE) method is examined by transmission electron microscopy (TEM) at different Li insertion states, and then electrochemical properties of the tin power electrode are characterized by galvanostatic charge–discharge experiments. It is found that several Li/Sn inter-metalic compounds are formed during lithium insertion, namely Li1−xSn, L13Sn5and Li7Sn2. The passivation layer (or solid electrolyte interface, SEI) on the surface of particles cycled in an organic electrolyte electrochemical cell is characterized as Li2CO3and ROCO2Li by FT-IR spectroscopy. A great part of the passivation layer is amorphous, but a small is poorly crystallized.