Benefitting from higher specific capacities, acceptable cost, nontoxicity and unique crystal structures, the molybdenum oxides have been studied as the anode materials for lithium ion batteries (LIBs). Herein, a direct current (DC) arc-discharge plasma technique has been developed to in-situ synthesize carbon-coated monocrystal molybdenum oxides ((MoO₃NRs/MoO₂NPs)@C) nanocomposites, using coarse MoO₃ bulk as the raw material and methane (CH₄) gas as the carbon source. It is indicated that crystallographic traits of MoO₃ and MoO₂ nuclei give rise to an anisotropic growth of monocrystal MoO₃ nanorods (NRs) along <100> direction and an isotropic growth of monocrystal MoO₂ nanoparticles (NPs). The carbon shells on MoO₃/MoO₂ nanostructures are generated from the absorption of carbon atoms in surrounding atmosphere or the release of supersaturated carbon atoms in MoOC solid solution. Unique constitution and pseudo-capacitive behavior of (MoO₃NRs/MoO₂NPs)@C bring merits to excellent cycling performance and rate capability, i.e. a remarkable specific capacity of 840 mA h⋅g⁻¹ after 100 cycles at a current density of 0.1 A g⁻¹ and a retained capacity of 210 mA h⋅g⁻¹ at 6.4 A g⁻¹. This work has offered a simple and efficient approach to fabricate the carbon-coated molybdenum oxides nanostructures for promising anode materials of LIBs.

受益于更高的比容量，可接受的成本，无毒和独特的晶体结构，已经研究了钼氧化物作为锂离子电池（LIB）的负极材料。在此，已开发出直流（DC）电弧放电等离子体技术，以粗MoO ₃块为原料，原位合成碳包覆的单晶氧化钼（（MoO ₃ NRs / MoO ₂ NPs）@C）纳米复合材料。材料和甲烷（CH ₄）气体作为碳源。结果表明，MoO ₃和MoO ₂原子核的晶体学特征引起了单晶MoO ₃的各向异性生长。沿<100>方向的纳米棒（NRs）和单晶MoO ₂纳米颗粒（NPs）的各向同性生长。MoO ₃ / MoO ₂纳米结构上的碳壳是由周围大气中碳原子的吸收或Mo O C固溶体中过饱和碳原子的释放产生的。（MoO ₃ NRs / MoO ₂ NPs）@C的独特构成和拟电容特性使其具有出色的循环性能和倍率性能，即在电流密度为100次循环后的840 mAh⋅g ^-1的显着比容量。 0.1 A g ^-1和210 mAh⋅g ^-1的保留容量在6.4 A g ^-1。这项工作提供了一种简单有效的方法来制造碳包覆的钼氧化物纳米结构，以用于有希望的LIB阳极材料。