Enhanced high-voltage properties of LiCoO2 coated with Li[Li0.2Mn0.6Ni0.2]O2

Vapor-assisted synthesis of Al2O3-coated LiCoO2 for high-voltage lithium ion batteries

“…Table 1 lists the lattice constants a and c of the two samples obtained by analyzing the XRD patterns (with measurement error of about AE0.1%). The value of a and c are obtained from Rietveld Refinement of X-ray diffraction data [26,27]. It is found that the lattice constants a and c for the pristine sample do not differ significantly from those for the coated sample.…”

Polypyrrole-coated LiCoO 2 nanocomposite with enhanced electrochemical properties at high voltage for lithium-ion batteries

“…LiCoO 2 powder with an average particle size of 10 mm was prepared in our previous work [17]. The PPy-coated LiCoO 2 composite powder was prepared by the chemical polymerization with sodium p-toluenesulfonate (AR, 99%) as the dopant.…”

“…As an alternative, the surface modification of LiCoO 2 with inorganic materials such as LiFePO 4 [12], LiMgPO 4 [13], LiNi 0.5 Mn 1.5 O 2 [8], LiNbO 3 [14], LiMn 2 O 4 [15], Li 4 [17], Al 2 O 3 [18], ZnO [19], LiF [20], MgF 2 [21] and FePO 4 [22] has been extensively investigated and achieved good effect on inhibiting capacity fading. However, the inorganic materials are discontinuously deposited onto the surface of LiCoO 2 , tending to act as an inert layer regarding ionic conduction and also require complex coating process.…”

Spinel MgAl2O4 modification on LiCoO2 cathode materials with the combined advantages of MgO and Al2O3 modifications for high-voltage lithium-ion batteries

“…9b) are composed of two semicircles in the highto-medium frequency range and an inclined line in the low frequency range, similar as previously reported. 11,13,[28][29][30] The inset equivalent circuit in Fig. 9a is used to t the Nyquist plots.…”