Direct Pyrolysis of Molybdophosphate-based Ionic Salt for One-step Synthesis of N,P Co-doped Carbon/MoO_3-x Hybrids with Superior Lithium Storage Performance

Abstract

N,P co-doped carbon/MoO_3-x hybrids(NPC/MoO_3-x) were synthesized via one-step pyrolysis of molyb-dophosphate-based ionic salt precursor. Doped carbon and oxygen vacancies(OVs) were synchronously introduced into the NPC/MoO_3-x hybrids without any other redundant procedure. As anodes for lithium-ion batteries, the NPC/MoO_3-x hybrids delivered a high initial Coulombic efficiency(ICE) of 81% as well as high charge capacity of 516 mA·h/g after 100 cycles at 1 A/g, indicating the excellent reversibility and rate capability. The enhanced lithium storage performance was attributed to the rational combination of surface engineering and OVs, which is beneficial to the more active sites and fast ionic/electronic transport.

Keywords

Lithium ion battery / Anode / Molybdenum oxide / Doped carbon / Oxygen vacancy

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