Scalable synthesis SiO@C anode by fluidization thermal chemical vapor deposition in fluidized bed reactor for high-energy lithium-ion battery

Abstract

The traditional preparation method of silicon monoxide (SiO) electrode is suffer from easy to agglomerate, rigour synthesis conditions and high cost, which seriously impede its application in power battery. In order to restrain aggregation or cake of powder particles during heating reaction and improve the dispersion performance of SiO powders, we adopt a novel fluidization thermal chemical vapor deposition (FTCVD) synthesis strategy. The strategy of this study is carried out in a kilogram-scale fluidization bed reactor. This approach is simple, manageable, inexpensive and scalable-productive, which can use for a large-scale production and commercial application. Here, the SiO@C composite through low cost micron-scale SiO powders as raw material no further grinding. The SiO@C anode material shows a high capacity of 501 mAh g−1 after 300 cycles at a current density of 1.2 A g−1, and an initial coulomb efficiency of 82% and high capacity retention of 93.3%. The new method can be applied to a large-scale production and commercial application.