Electronic state of cobalt and oxygen ions in stoichiometric and nonstoichiometric Li1+xCoO2 before and after delithiation according to XPS and DRS

Macroporous Helical Silica Immobilizing Cobalt-Salen Complex Catalyzed Asymmetric Hydrolytic Kinetic Resolution of Epoxides

“…These phenomena were characteristic of Co 3? ions in octahedral coordination, which had been confirmed in previous reports [37,38]. As a reference, the high spin Co 2?…”

Rotor blade grinding and re-annealing of LiCoO2: SEM, XPS, EIS and electrochemical study

“…The surface properties of LiCoO 2 have been previously studied using XPS [16][17][18]. The changes in the XPS spectra during cycling of LiCoO 2 electrodes have also been reported [19,20]. In this study, we report an XPS study on ground and re-annealed LiCoO 2 .…”

“…The Co2p 3/2 profiles were deconvoluted, and the calculated BE values (779.5 and 780.5 eV) are shown in Table 1. The most intense Co2p 3/2 (and Co2p 1/2 ) peaks are ascribable to Co 3+ in the normal sites of the LiCoO 2 framework [20,21]. According to the literature, the peaks at 780.5 (Co2p 3/2 ) and 796 eV (Co2p 1/2 ) are ascribed to Co 2+ ions [22].…”

“…7(a) and Table 3). These carbon atoms come from a very small amount of lithium carbonate forming a film on the LiCoO 2 particlesÕ surface [20,21,23,24]. Carbonation is a common phenomenon for metal oxides [25][26][27][28] and, particularly, in samples containing alkaline elements [28].…”

Doping cobalt hydroxide nanowires for better supercapacitor performance

“…Fig. 2a shows a separation of $15.0 eV, characteristic of a Co(OH) 2 phase [26][27][28][29]. After doping Mn, the separation changed slightly to $15.1 eV, as shown in Fig.…”