1 School of Materials Science and Engineering, Dalian University of Technology, Dalin 116024; 2 Ningbo Branch of China Academy of Ordnance Science, Ningbo 315103
Abstract: Si-Al nanoparticles (Si-Al NPs) possessed the nanocapsule structure with crystal Si shell and monocrystal Al core were prepared by DC arc-discharge plasma method. The hollow Si nanospheres (Si HNSs) were successfully obtained by subsequently removing the Al component from Si-Al NPs through acid pickling process. Both of Si-Al NPs and Si HNSs were investigated as the anode materials for lithium ion battery. The results indicated that electrochemical performances of Si HNSs electrode had been greatly improved compared with Si-Al NPs electrode, because the hollow space in Si nanosphere could provide an effective buffer space for volume change during the intercalation/deintercalation of lithium ions and supplies more migration channels for lithium ions.
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2018, Vol. 32 
