Recent Progress on Molybdenum Oxides for Rechargeable Batteries

Abstract

bility during the reaction, andl ow electronic conductivity (ca. 10 À5 Scm À1 ). [28,29] Reduced molybdenum oxides,i ncluding MoO 2 and MoO x (2 < x < 3), with intrinsic oxygen vacancies, comparedwith pure MoO 3 ,can greatly increase the conductivity,a nd have been studied as attractive electrode materials. [30,31] Unfortunately,a s-fabricated batteries based on MoO 2 or MoO x electrodes still suffer from poor cycling stability and low recharge efficiency.T herefore, much effort has been invested over the past few years to pursuet he high energy efficiency, high cycling stability,a nd prominentr ate capability of molybdenum oxide-based electrodes for rechargeable batteries.Herein, we presentabrief summary of recent progress in the use of molybdenum oxides, including MoO 3 and MoO 2 ,a s well their composites, as electrodes for rechargeable batteries, such as LIBs, SIBs, Li-S batteries, Li-O 2 batteries, and other novel battery systems. The charge-storage mechanisms, fabrication of the electrode structures, and electrochemical performances, combined with their relationships, are mainlyd iscussed. This Minireview focuseso nc urrently developed strategies to improvet he energy-storage performances of the electrodes, through morphology modification,d efect engineering, and synergistic effects of hybrid electrodes, and thus, to optimize the electrochemical properties of the batteries. Finally, perspectives on MoO 3 -a nd MoO 2 -based compounds for the future development of rechargeable batteries are also presented.

Pillared Mo2TiC2 MXene for high-power and long-life lithium and sodium-ion batteries

“…53 In these reports on Mo oxides, Li 2 O typically forms amorphous nanosized particles which cannot be observed using techniques which rely on long-range order such as XRD. [54][55][56] Therefore, we used a series of spectroscopic studies (NMR, XPS and Raman) to experimentally validate the charge storage mechanism for the rst time. These techniques are able to probe the local structure and surface environments of materials, and are typically utilised to investigate the formation of Li 2 O as a discharge product in Mo oxides.…”

Nanostructured MoO3 for Efficient Energy and Environmental Catalysis

“…Several current challenges and perspective research directions based on nanostructured MoO 3 are also discussed.Molecules 2020, 25, 18 2 of 26 applications in energy and environmental catalysis on account of their relatively low cost, high activity, and stability [9][10][11][12].Molybdenum oxide (MoO 3 ), a kind of transition metal oxide with a n-type semiconducting, nontoxic nature and high stability, has attracted a lot of attention. In particular, nanostructured MoO 3 has demonstrated superior properties to bulk MoO 3 , which is successfully employed in rechargeable batteries [13], capacitors [14], photocatalysis [15], electrocatalysis [16], gas sensors [17], and other applications [6]. The extended tunnels between the MoO 6 octahedra in MoO 3 are suitable for insert/de-insert mobile ions, such as H + and Li + , and multiple oxidation states can enable rich redox reactions.…”

“…The extended tunnels between the MoO 6 octahedra in MoO 3 are suitable for insert/de-insert mobile ions, such as H + and Li + , and multiple oxidation states can enable rich redox reactions. Moreover, the superiorities of low cost, chemical stability, high theoretical specific capacity (1117 mA·h/g), and the environmentally friendly nature make nanostructured MoO 3 exceptional electrode materials for rechargeable batteries capacitors [13,18]. MoO 3 has been investigated as the photocatalyst in terms of its anisotropic layered structure for absorbing UV, as well as visible light.…”

Core–Sheath Structured MoO3@MoS2 Composite for High-Performance Lithium-Ion Battery Anodes

“…Seen as the feasible choice to take the place of graphite anode material, transition metal oxides (TMOs) are widely investigated by researchers. , Among various TMOs, α-MoO 3 is considered as a potential replacement of graphite because of its high theoretical specific capacity of 1117 mAh/g and high thermal stability . Meanwhile, the graphite-like-layered structure of α-MoO 3 makes it can undergo reversible Li + insertion/extraction during the cycling process. − Resembling TMOs, transition metal dichalcogenides (TMDs) have also attracted great attention due to their high energy density and special structural characteristics. − As a typical representative of TMDs, molybdenum disulfide (MoS 2 ) possesses a complex Li + insertion/extraction mechanism, which makes MoS 2 reveal a more enhanced capacity than its theoretical capacity. ,− Benefitting from those merits, MoO 3 and MoS 2 seem to be promising electrode materials if some intrinsic defects of both can be solved.…”

“…5,6 Among various TMOs, α-MoO 3 is considered as a potential replacement of graphite because of its high theoretical specific capacity of 1117 mAh/g and high thermal stability. 7 Meanwhile, the graphite-like-layered structure of α-MoO 3 makes it can undergo reversible Li + insertion/ extraction during the cycling process. 8−11 Resembling TMOs, transition metal dichalcogenides (TMDs) have also attracted great attention due to their high energy density and special structural characteristics.…”