| 초록 |
Carbon-fluorine (CmFn) functional groups are introduced on the surface of platelet carbon nanofiber (PCNF) and graphitized platelet carbon nanofiber (GPCNF) for enhanced rate performance of lithium-ion battery (LIB) anodes. The CmFn functional groups are selectively introduced via controlled plasma treatment in vacuo with C4F8 gas. Combined XPS, FT-IR and TOF-SIMS analyses demonstrate that the CmFn functional groups had mainly semi-ionic C-F bonds. PCNF treated with the plasma exhibits the largest discharge capacity of 387 mAh/g with increased first-cycle coulombic efficiency and discharge capacity of 293 mAh/g at the 10C rate, which are 1.13- and 1.63-fold higher values, respectively, than those of pristine PCNF |
