Double-shell Li-rich layered oxide hollow microspheres with sandwich-like carbon@spinel@layered@spinel@carbon shells as high-rate lithium ion battery cathode

Surface homogenizing heterostructure coatings induced by Ti 3 C 2 T x MXene for enhanced cycle performance of lithium‐rich cathode materials

“…It is worth noting that the TiO 2 modified samples have a significant shoulder at 654 cm −1 , which is related to the Mn‐O vibration of the spinel phase. Figure S5 shows the crystal structure of the spinel phase . The Raman test results are in accordance with the XRD analysis results.…”

“…Figure S5 shows the crystal structure of the spinel phase. 11 The Raman test results are in accordance with the XRD analysis results.…”

“…It is worth noting that two platforms appear at about 2.6 and 2.9 V in the discharge curves of TiO 2 modified materials ( Figure 3B), corresponding to the spinel phase. 11,28,29 It is also clear to find the anodic peaks of the spinel phase from the corresponding capacity differential curves ( Figure 3C). The formation of interfacial spinel phase plays a good role in promoting the electrochemical performance of the electrode.…”

“…The typical initial charge‐discharge profile was exhibited in Figure A, at the current density of 12.5 mA g −1 . It is worth noting that two platforms appear at about 2.6 and 2.9 V in the discharge curves of TiO 2 modified materials (Figure B), corresponding to the spinel phase . It is also clear to find the anodic peaks of the spinel phase from the corresponding capacity differential curves (Figure C).…”

“…6 In addition, the surface of the electrode is severely corroded by the electrolyte after continuous cycles, which is another reason for performance degradation. Therefore, the researchers tried to alleviate these problems through various modification methods, [9][10][11][12][13][14] and have obtained certain results. Surface coating is widely used as a common and effective modification method.…”