TiO₂-coated MoP/phosphorus doped carbon nanorods for ultralong-life sodium ion batteries with high capacity

Abstract

How to green synthesize and construct MoP anode electrode materials with advanced structures for sodium-ion batteries still faces great challenges. Herein, TiO2-coated MoP/phosphorus doped carbon (MoP@TiO2/P-C) nanorod with a new...

Nest-Like Molybdenum Diphosphide-Carbon Nanotube Nanocomposite for Lithium-Ion Storage

“…To satisfy the ever-growing demand for high-energy-density lithium-ion batteries (LIBs), new-generation anode materials with high capacity and long-term stability have been extensively explored. − In recent years, phosphorus-based materials, including metal phosphides (MPs) and elemental phosphorus with high theoretical specific capacity (500–1900 mA h g –1 for MPs and 2596 mA h g –1 for phosphorus) have been widely concerned. − ,− The highly delocalized electron and mixed anionic metal band in MPs induce a low oxidation state of metal and strong metal–phosphorus (M–P) covalent bonds. − MPs have better electrical conductivity (10 –12 –10 2 S m –1 for phosphorus and 10 –3 ∼ 10 6 S m –1 for MPs) and higher structural stability than elemental phosphorus, so the MP-based materials are promising anode materials for LIBs. ,,− Moreover, the formation of metallic nanocrystals within phosphorus matrices during charging/discharging cycles also provides additional electron transport pathways, which are required for high-rate anode. ,, Molybdenum phosphides (i.e., monophosphorus phase MoP and phosphorus-rich phase MoP 2 ) as low-cost catalysts for hydrogen evolution reaction and anode materials have been extensively explored. ,,− Molybdenum is an important element with a redox chemistry and better conductivity. The lithium-ion storage capacity of metal phosphides is proportional to the phosphorus content; ,,− thus, MoP 2 is a more attractive material for LIBs .…”