High yield fabrication of hollow vesica-like silicon based on the Kirkendall effect and its application to energy storage

摘要: Recently, a unique process based on the Kirkendall effect was employed to generate hollow nanostructures with wide variety of materials. However, similar structure silicon fabrication mechanism is still not proposed. Here, we provide an extensible synthesis method for high yield uniform vesica-like Si material from SiO2 in molten salt reduction process. Significantly, without further modification, as-prepared exhibits electrochemical storage capacity and long cycling properties (∼712 mA h g−1 at 0.36 A over 200 cycles).