| 초록 |
For an anode material in Li-ion battery, graphite has been employed due to its good cycle properties and reasonable theoretical capacity of 372mAh/g. However, to meet increasing demand for high-energy-density batteries the investigation of new anode materials is essential. Silicon is an attractive anode material owing to its high specific capacity (~4200mAh/g), however, the 400% volume change upon insertion and extraction of lithium results in cracking and capacity loss. In present study, we have created new anode materials consist of ion conducting polymers coated silicon nanoparticle (SiNP). The surface capping polymers not only provide the ability to control the spacing between SiNPs but also significantly suppress the deformation of SiNPs during Lithiation/de-lithiation. The cycle properties of composite anodes was examined by galvanostatic methods and the morphological changes of SiNPs during charging/discharging cycles were investigated by combining HRTEM and XRD. |
