Abstract Manganese oxide is a promising anode material in next-generation rechargeable batteries due to its high theoretical specific capacity and low reduction potential. Here we report a facile and scalable approach to fabricate the novel Mn3O4 and nitrogen-doped porous carbon hybrid nanocomposite (Mn3O4/C N) as lithium-ion battery anodes. The obtained nanocomposite has numerous nanosized Mn3O4 nanoparticles (∼30 nm), which are uniformly dispersed in N-doped porous carbon matrix (the N content is ∼12.2%). The N-doped porous carbon matrix can not only improve the electronic conductivity and increase the Li+ storage active sites, but also accommodate the structural stress generated by volume change of Mn3O4 nanoparticles during cycling. Remarkably, the Mn3O4/C N anode exhibits long-term cycling stability for a reversible discharge capacity of 945 mA h g−1 (the specific capacity is calculated using the mass of the whole hybrid) at a current density of 1 A g−1 after 400 cycles, indicating a capacity retention of 94.7%. The Mn3O4/C N anode with excellent performance shows its immense potential for lithium-ion batteries.

中文翻译：

---

基于Mn3O4/氮掺杂多孔碳混合结构的高性能锂离子电池负极

摘要 锰氧化物具有较高的理论比容量和较低的还原电位，是下一代可充电电池中很有前景的负极材料。在这里，我们报告了一种简便且可扩展的方法来制造新型 Mn3O4 和掺氮多孔碳混合纳米复合材料 (Mn3O4/CN) 作为锂离子电池阳极。获得的纳米复合材料具有许多纳米尺寸的 Mn3O4 纳米粒子（~30 nm），它们均匀地分散在 N 掺杂的多孔碳基质中（N 含量为~12.2%）。N掺杂的多孔碳基体不仅可以提高电子电导率和增加Li+存储活性位点，还可以适应循环过程中Mn3O4纳米颗粒体积变化产生的结构应力。值得注意的是，Mn3O4/CN 负极在 1 A g-1 的电流密度下在 400 次循环后表现出长期循环稳定性，可逆放电容量为 945 mA hg-1（比容量使用整个混合体的质量计算），表明容量保持率为 94.7%。性能优异的 Mn3O4/CN 负极显示出其在锂离子电池方面的巨大潜力。