A facile synthesis of the hierarchically porous cathode with Mo₂C nanoparticles through the electrospinning technique and heat treatment is proposed. The carbonization temperature of the precursors is the key factor for the formation of Mo₂C nanoparticles on the carbon nanofibers (MCNFs). Compared with the Mo₂N nanoparticles embedded into N-doped carbon nanofibers film (MNNFs) and N-doped carbon nanofibers film (NFs), the battery with MCNFs cathode is capable of operation with a high-capacity (10,509 mAh g⁻¹ at 100 mA g⁻¹), a much reduced discharge-charge voltage gap, and a long-term life (124 cycles at 200 mA g⁻¹ with a specific capacity limit of 500 mAh g⁻¹). These excellent performances are derived from the synergy of the following advantageous factors: (1) the hierarchically self-standing and binder-free structure of MCNFs could ensure the high diffusion flux of Li⁺ and O₂ as well as avoid clogging of the discharge product, bulk Li₂O₂; (2) the well dispersed Mo₂C nanoparticles not only afford rich active sites, but also facilitate the electronic transfer for catalysis.

提出了一种通过静电纺丝技术和热处理简便合成具有 Mo _{2 C 纳米粒子的分级多孔阴极的方法。}前驱体的碳化温度是在碳纳米纤维（MCNF）上形成Mo _{2 C纳米颗粒的关键因素。}与嵌入 N 掺杂碳纳米纤维薄膜 (MNNFs) 和 N 掺杂碳纳米纤维薄膜 (NFs) 中的 Mo _{2 N 纳米粒子相比，具有 MCNFs 阴极的电池能够以高容量运行（10,509 mAh g} ^-1在100 mA g ⁻¹），放电-充电电压差大大减小，寿命长（200 mA g ⁻¹下 124 次循环，比容量限制为 500 mAh g ⁻¹). 这些优异的性能源于以下优势因素的协同作用：（1）MCNFs的分层自立和无粘结剂结构可以保证Li ⁺和O ₂的高扩散通量，同时避免放电产物的堵塞, 散装 Li ₂ O ₂ ; (2)分散良好的Mo ₂ C纳米粒子不仅提供了丰富的活性位点，而且有利于催化的电子转移。