In this work, hollow carbon nanospheres (HCN) loaded with MnO₂ (denoted as MnO₂@HCN) are investigated as an anode material for lithium-ion batteries. HCN is developed by treatment of 3-aminophenol and formaldehyde resin. MnO₂ is loaded on the outer surface of HCN via the reduction of KMnO₄ to form porous core-shell structures. SEM, TEM and XRD characterizations indicate that the MnO₂@HCN has a spherical morphology with a core consisting of porous carbon nanoparticles and a shell consisting of MnO₂ nanoparticles. The charge-discharge tests demonstrate that this unique configuration endows the resulting MnO₂@HCN with excellent electrochemical performance as anode of a lithium ion battery, delivering a capacity of 604 mA h g⁻¹ at 0.3 C after 200 cycles, compared to 211 mA h g⁻¹ of the HCN. The porous structure consisting of small nanoparticles provides MnO₂@HCN with high surface area and good structural stability, facilitating lithium insertion/extraction, which yields excellent cycling stability of the MnO₂@HCN electrode.

在这项工作中，研究了负载有MnO _2的空心碳纳米球（HCN）（表示为MnO ₂ @HCN）作为锂离子电池的负极材料。HCN是通过处理3-氨基苯酚和甲醛树脂而开发的。通过还原KMnO ₄将MnO ₂负载在HCN的外表面上，以形成多孔核-壳结构。SEM，TEM和XRD表征表明MnO ₂ @HCN具有球形形态，其核由多孔碳纳米颗粒组成，壳由MnO ₂纳米颗粒组成。充放电测试表明，这种独特的配置赋予了生成的MnO ₂@HCN作为锂离子电池的阳极具有出色的电化学性能，在200个循环后，在0.3 C下的容量为604 mA h g ^-1，而HCN则为211 mA h g ^-1。由小的纳米颗粒组成的多孔结构为MnO ₂ @HCN提供了较大的表面积和良好的结构稳定性，有利于锂的插入/萃取，从而产生了MnO ₂ @HCN电极极好的循环稳定性。