电沉积法制备锂离子电池锡铜合金负极及表面修饰

稀有金属材料与工程, 2006, 35(z2): 359-364.

电沉积法制备锂离子电池锡铜合金负极及表面修饰

任建国 ^1, , 蒲薇华 ^2, , 何向明 ^3, , 万春荣 ^4, , 姜长印 ^5,

1.清华大学,北京,102201

2.清华大学,北京,102201

3.清华大学,北京,102201

4.清华大学,北京,102201

5.清华大学,北京,102201

关键词：锂离子电池 , 锡铜合金 , 热处理 , 表面修饰

Synthesis and Surface Modification of Tin-Copper Alloy Anode for Lithium Ion Battery by Electrodeposition Process

采用脉冲电沉积与热处理相结合的工艺制备铜锡合金,并作为锂离子电池的负极考察其电化学性能.在集流体铜箔上直接沉积锡,然后进行热处理形成铜锡合金层.锡电极在200℃和300℃热处理过程中分别形成了Sn/Cu6Sn5/Cu3Sn和Sn/Cu3Sn复相结构,合金相的产生提高了电极的循环性能,但降低了电极的比容量.通过在锡电极表面覆铜,改变了锡电极热处理后的表面成分,由Sn/Cu6Sn5混合相转变为Cu/Cu6Sn5混合相,有效提高了锡电极长期循环的结构稳定性,使电极同时具备了较高的活性和较好的循环性能.

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电沉积法制备锂离子电池锡铜合金负极及表面修饰

Synthesis and Surface Modification of Tin-Copper Alloy Anode for Lithium Ion Battery by Electrodeposition Process

参考文献