The effect of pressure and temperature on the structure and electrical transport properties of MoO2

A Composite of Nb2O5 and MoO2 as a High‐Capacity High‐Rate Anode Material for Lithium‐Ion Batteries

“…[10][11][12][13][14] Nb 2 O 5 has a reasonable capacity (200 mAh g À 1 , described by [15,16] but would struggle to compete with high capacity materials such as Si, since, as with many oxides, Nb 2 O 5 is limited by its conductivity. [17] MoO 2 is a rare oxide that is both conductive and has a high capacity towards lithium (838 mAh g À 1 , four electron reaction), [18][19][20][21] where the four-electron reaction is achieved via a Li-ion storage mechanism which is a combination of conversion and intercalation. [22] However, due to the nature of the conversion reaction MoO 2 lacks long term stability, or high-rate capability.…”

“…Nb 2 O 5 has a reasonable capacity (200 mAh g −1 , described by $${{{\rm N}{\rm b}}_{2}{{\rm O}}_{5}+x{{\rm L}{\rm i}}^{+}+x{{\rm e}}^{-}{\rm \ }\leftrightarrow {{\rm L}{\rm i}}_{x}{{\rm N}{\rm b}}_{2}{{\rm O}}_{5}}$$ , when x =2) [15,16] but would struggle to compete with high capacity materials such as Si, since, as with many oxides, Nb 2 O 5 is limited by its conductivity [17] . MoO 2 is a rare oxide that is both conductive and has a high capacity towards lithium (838 mAh g −1 , four electron reaction), [18–21] where the four‐electron reaction is achieved via a Li‐ion storage mechanism which is a combination of conversion and intercalation [22] . However, due to the nature of the conversion reaction MoO 2 lacks long term stability, or high‐rate capability.…”

Comparative Studies on Two-Dimensional (2D) Rectangular and Hexagonal Molybdenum Dioxide Nanosheets with Different Thickness

“…A small variation in Mo valence may cause significant fluctuations in physical properties of the molybdenum oxides. For instance, it is possible to obtain compounds of other oxides with diverse physical properties [23,24].…”

“…Jacob et al described the deformation in MoO 2 at high temperature and acknowledged a phase transition occurring at specific temperature with transformation of distorted rutile structure ( P 2 1 / c ) into a hexagonal rutile structure ( P 4 2 / mnm ) [ 27 ]. In addition, the electronic structure and properties of molybdenum oxide materials vary with thickness [ 16 ], and MoO 2 nanostructures have been widely used in electro-chemical supercapacitors [ 28 ], catalysis [ 18 ], sensing [ 29 ], energy storage [ 30 ], electrochromic displays [ 31 ], and energy conversion regimes [ 32 ] because of their superior charge transport properties [ 24 ]. Furthermore, various methods have been used for synthesis of diverse morphologies MoO 2 for achievement of exceptional properties.…”

Effect of High Pressure on the Dielectric Properties of SrMoO4

“…High pressure as a powerful thermodynamic variable is an important tool to discover new structures and properties of materials. , Pressure-induced phase transition directly affects the dielectric properties of materials. − The interaction between ions, distribution of bound charge, polarization, and relaxation of these ions under external electric field are fundamental issues of structures. The systematic research on dielectric properties under high pressure will be beneficial for optimizing the performance and exploring the potential application of materials.…”