Constructing effective TiO2 nano-coating for high-voltage Ni-rich cathode materials for lithium ion batteries by precise kinetic control

Nano-TiO2 coated single-crystal LiNi0.65Co0.15Mn0.2O2 for lithium-ion batteries with a stable structure and excellent cycling performance at a high cut-off voltage

“…7, S11 and S12 † show that the Nyquist curve is composed of three semicircles and an inclined straight line from high to low frequencies, which in turn represent the impedance of Li + across the solid electrolyte interface (R f ), the electron transport resistance inside the active material (R e ), the electron transport resistance at the interface between the electrode and electrolyte (R ct ), and Warburg impedance (Z w ). 53,54 The equivalent circuit diagram is shown in Fig. 7e.…”

Understanding the Stabilizing Effects of Nanoscale Metal Oxide and Li–Metal Oxide Coatings on Lithium-Ion Battery Positive Electrode Materials

“…Therefore, in a highly delithiated state, they cannot withstand the as-produced stress and lead to the formation of microcracks along the grain boundaries , These microcracks can bring structural degradation due to the penetration of an electrolyte. This results in the formation of a thicker surface film and irreversible volume changes which will cause capacity loss. , …”

The role of metal substitutions in the development of Li batteries, part I: cathodes

“…256 Titanium coatings have been shown to be similarly effective. 206,[257][258][259] See Guan for a more rigorous review of cathode coatings. 18 Alternatively, performance can be improved using a coreshell structure, or a core-gradient-shell structure.…”