Novel silicon nanowire film on copper foil as high performance anode for lithium-ion batteries |
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| Authors: | Xin Wang Lanyan Huang Yongguang Zhang Fuxing Yin Zhumabay Bakenov Nurzhan Umirov Mingliang Jin Guofu Zhou |
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| Institution: | 1.Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou,China;2.Synergy Innovation Institute of GDUT,Heyuan,China;3.Research Institute for Energy Equipment Materials,Hebei University of Technology,Tianjin,China;4.Institute of Batteries LLC, National Laboratory Astana, School of Engineering,Nazarbayev University,Astana,Kazakhstan;5.Institute for Advanced Materials (IAM), Academy of Advanced Optoelectronics,South China Normal University,Guangzhou,China |
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| Abstract: | A novel silicon nanowire film anode was successfully prepared by a combination of magnetron sputtering deposition and metal-catalyzed electroless etching technology. Scanning electron microscopy revealed the formation of a Si film composed of nanowires with a diameter of ~70 nm and lengths of ~3.5 μm. As-prepared Si nanowire film is directly grown on current collectors without binders and carbon additives, which provides a good contact and adhesion of them to current collector. Furthermore, the defined spacing of nanoscale Si nanowire allows Si to undergo large volume change during the alloying/dealloying process without loss of its integrity. These structural features of the resulting Si nanowire make it a promising anode for lithium-ion batteries with remarkably improved electrochemical performance compared with the Si film-based electrode prepared without metal-catalyzed electroless etching process. |
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