| 초록 |
Nowadays, Industrialization and economic growth are deriving to a rapidly increase in global energy consumption. This current caused severe environment contamination and depleted fossil resources, so that need to new energy technology. Lithium secondary battery has attracted attention next-generation energy source. Recently Silicon is attracting attention as a lithium secondary battery Anode. Silicon was considerable interest as a high energy density and high theoretical specific capacity (3500~4200 mAh g-1). However, because of large volume changes (＞ 300%) for lithiation–delithiation of silicon while electrochemical progress can bring about pulverization and shatter of silicon anodes, and a rapid decline in capacity. So, in this study, use as an anode material of lithium secondary battery, graphite-silicon composite powders are prepared by ball-milling with silicon nano particles and graphite powder and their electrochemical properties are examined. The graphite-silicon composite anode improved their specific capacity and their life time than silicon based anode. |
