期刊
SOLID STATE IONICS
卷 237, 期 -, 页码 1-7出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2013.02.005
关键词
Lithium-ion battery; Anode; Tin-copper alloy; Three-dimensional porous copper
资金
- National Natural Science Foundation of China [20903016, 21073021]
- Cultivation Fund of the Key Scientific and Technical Innovation Project,
- Ministry of Education of China [708084]
- Special Fund for Basic Scientific Research of Central Colleges, Chang'an University [CHD2010JC006]
Three-dimensional (3D) porous Cu with excellent mechanical strength and interconnected pores with a size of similar to 3 mu m is prepared by electroless plating and used as the substrate for Sn-Cu alloy electrodes. The charge/discharge test results indicate that the Sn-Cu alloy electrode on 3D porous Cu delivered large high-power specific capacity and excellent cycleability thanks to its porous structure. The morphology evolution of Sn-Cu alloy electrode on 3D porous Cu during charging/discharging is investigated by scanning electron microscope (SEM). The results demonstrate that the Sn-Cu alloy can reversibly expand and contract to some extent owing to the pore space that can accommodate volume variation, which is the main reason for its excellent electrochemical performance. Electrochemical impedance spectroscopy (EIS) is also used to characterize electrode resistance variation upon cycling. (C) 2013 Elsevier B.V. All rights reserved.
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