Excellent electrochemical properties of graphene-like carbon obtained from acid-treating natural black talc as Li-ion battery anode

Fluorination of MXene by Elemental F2 as Electrode Material for Lithium‐Ion Batteries

“…[41] An additional peak is found in the FMX3 spectrum at ah igher BE of 689.4 eV attributed to CF 2 as is also seen from the C1ss pectrum (see Figure 3a). [42] The spectrum from the FMX24s ample shows only two peaks that are related to TiÀOÀFb onds and covalently bonded Fw ith ah igh surface coverage. Withh igher fluorination times it is confirmed that the samples start to be dominated by two types of F, the TiÀ OÀFb ond and denselyp acked covalently bonded F (F HD ÀC).…”

“…It has also been reported that these peaks are attributed to semi‐ionic (F LD −C) and covalent (F HD −C) C−F bonding . An additional peak is found in the FMX3 spectrum at a higher BE of 689.4 eV attributed to CF 2 as is also seen from the C 1s spectrum (see Figure a) . The spectrum from the FMX24 sample shows only two peaks that are related to Ti−O−F bonds and covalently bonded F with a high surface coverage.…”

“…Therefore, the plateau observed in Figure b for FMX3 is not caused by formation of a solid–electrolyte interphase but rather from the reversible electrochemical reactions with TiF 3 , as is also seen in the subsequent cycles in Figure c . It is expected that with increased fluorination time more surface F, which is known to reduce irreversibly, would be present (with the exception of FMX24), as seen from Table . The capacity loss for FMX6 is thus from F surface groups that reduced irreversibly during the first discharge.…”

“…[36] It is expected that with increased fluorination time more surfaceF ,w hich is knownt o reduce irreversibly,w ould be present (with the exception of FMX24), as seen from Table 2. [42,49] The capacity loss for FMX6 is thus from Fs urface groups that reduced irreversibly during the first discharge.Aplateaua ta pproximately 0.9 Vi nt he second discharge profile of FMX6 is consistentw ith discharge profiles of TiOF 2 ,w hich is evidenced in the XRD data (see Figure 1c). In the XRD results, TiOF 2 (see Figure 1d)i sm uch more prominenti nt he FMX24 sample, and thus the plateau at approximately 0.9 Visthe resultofanamorphization process.…”

Green Synthesis of a Reduced‐Graphene‐Oxide Wrapped Nickel Oxide Nano‐Composite as an Anode For High‐Performance Lithium‐Ion Batteries

“…In case of GO electrode, a large current from 0.6 to 0.01 V vs. Li/Li + was observed in the 1 st cycle. This is attributed to the formation of solid electrolyte interphase (SEI) [52–54] . The RGO electrode exhibited two cathodic peaks at 1.1 and 0.8 V vs. Li/Li + in the 1 st cycle due to the SEI formation and irreversible reaction of Li ions with residual oxygen functional groups, respectively [17,52–54] .…”