Structure Effect of Si-Based Powder on Cycle Performance of Lithium Ion Battery

In this study, an inactive material (Ni) is introduced into Si for buffering the volume change causing by the lithium insertion and de-insertion. A porous structure is designed for further reducing of the volume change. The surface-porous structure SiNi powder is prepared by gas atomization method a...

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Bibliographic Details
Main Authors: Shieh, Dt, Yang, Mo-Hua, Guo, Zheng-Zhao, Hsieh, Ping-Hsun, Tsao, Shen, Lin, M.W., Liu, Wei-Ren, Wu, N.L.
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:In this study, an inactive material (Ni) is introduced into Si for buffering the volume change causing by the lithium insertion and de-insertion. A porous structure is designed for further reducing of the volume change. The surface-porous structure SiNi powder is prepared by gas atomization method and wet-etching in an acidic solution, which shows positive effects on cycle performance, high capacity and the efficiency at the first cycle. Coated a carbon layer onto SiNi powders by CVD process can further improve the cycle performance by preventing structure collapse.
ISSN:1938-5862
1938-6737
DOI:10.1149/1.2793573