Surface structure and electrochemical properties of surface-fluorinated petroleum cokes for lithium ion battery

Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery

“…The results of elemental analysis of surface-fluorinated petroleum coke samples are given in Table 1 [22]. Fluorine contents were relatively higher in PC, in particular in the sample fluorinated at 300 8C.…”

“…The fluorine contents were in the range of 0.3-0.6 at.% for PC1860, PC2300 and PC2800 when fluorinated at 300 8C. Table 2 shows binding energies of C1s, O1s and F1s electrons and surface composition of petroleum coke samples and those fluorinated at 300 8C [22]. The binding energies for F1s electron are close to that for C-F covalent bond (binding energy of F1s electron: 689-690 eV [1][2][3]) though they decreased from 688.8 eV to 687.3 eV with increasing crystallinity of petroleum coke.…”

“…The BET surface areas of petroleum cokes and surfacefluorinated samples are summarized in Table 4 [22]. The surface area of PC is large, however, decreasing to half or less than half by heat-treatment.…”

Surface-Fluorinated Carbon Materials for Supercapacitor

“…This result demonstrates that the fluorine functional groups are electrochemically active and increase the specific capacitance of the F-AC electrode, whereas other electrochemically active functional groups, such as oxygen or nitrogen, induce a pseudo-faradaic reaction [25,[27][28][29].…”

Microstructure and Charge–Discharge Characteristics of Ag–AgCl Coated Natural Bamboo Carbon

“…Surface modification of carbon materials is an effective method to improve the electrochemical characteristics of carbonaceous electrodes. In recent years, some methods of surface modification have been attempted viz., surface oxidation, 2) surface fluorination, 3) metal or metaloxide coating 4,5) and carbon coating. 6) According to our previous study, 5) carbon coating is a highly efficient interface reaction.…”