Development of electrochemical performances of carbon black obtained by the surface organosilicon-modified method

Enhanced Li Ion Storage Performances of Carbon Black by Introducing Organosulfur Groups on Surface

“…In order to explore the possibility of organosulfur MCB in actual applications, the amount of CB was expanded to 15 g, compared with our previous report. 12 As shown in Scheme 1, we carried out the organo-chlorination of CB by reaction of CB with thionyl chloride firstly. After C-Cl groups were introduced on the CB surface, the next modified reaction of CB-Cl with ethanethiol proceeded continuously.…”

“…After C-Cl groups were introduced on the CB surface, the next modified reaction of CB-Cl with ethanethiol proceeded continuously. Referring to our previous report (total number of moles of -COOH and -OH of CB are 2.54 © 10 ¹4 mol/g), 12 the amount of thionyl chloride showing at 3.05 © 10 ¹4 mol/g was used firstly. Secondly, the amounts of ethanethiol showing at 3.81 © 10 ¹4 mol/g and 1.27 © 10 ¹3 mol/g were used respectively.…”

“…[9][10][11] Similarly, in our previous studies, we successfully introduced the organosilicon groups such as -OSiR and -COOSiR groups on the surface of CB. 12 In this previous report, with giving the Li + storage capacity to the organosilicon modified CB (MCB), the itself inherent conductivity is not lost, which leads us to consider the organic-inorganic hybrid concept is the one of effective ways to enhance the Li + ion storage capacity of CB.…”

“…The organosulfur MCB shows the excellent Li + ion storage capacity at 671 mAh/g on the first cycle, and 392 mAh/g after cycling the charge-discharg 100 times, which is higher than that of organosilicon MCB. 12 However, in Li + ion storage mechanism, differing from the general Li/S batteries, [13][14][15] the capacitive effects contributed to the noticeable improvement of storage capacity of organosulfur MCB, which was determined by detailed measurements of FT-IR and CV. These results expand the usage of CB in application as anode electrode of LIBs not only, but also give the simple and effective way to improve the electrochemical performances of general carbon materials.…”