Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, Hunan University, Hunan, PR China.
Nanoscale. 2013 Jun 21;5(12):5499-505. doi: 10.1039/c3nr00467h.
SnOx is a promising high-capacity anode material for lithium-ion batteries (LIBs), but it usually exhibits poor cycling stability because of its huge volume variation during the lithium uptake and release process. In this paper, SnOx carbon nanofibers (SnOx@CNFs) are firstly obtained in the form of a nonwoven mat by electrospinning followed by calcination in a 0.02 Mpa environment at 500 °C. Then we use a simple mixing method for the synthesis of SnOx@CNF@graphene (SnOx@C@G) nanocomposite. By this technique, the SnOx@CNFs can be homogeneously deposited in graphene nanosheets (GNSs). The highly scattered SnOx@C@G composite exhibits enhanced electrochemical performance as anode material for LIBs. The double protection strategy to improve the electrode performance through producing SnOx@C@G composites is versatile. In addition, the double protection strategy can be extended to the fabrication of various types of composites between metal oxides and graphene nanomaterials, possessing promising applications in catalysis, sensing, supercapacitors and fuel cells.
SnOx 是一种很有前途的高容量锂离子电池（LIBs）阳极材料，但由于其在锂的吸收和释放过程中体积变化巨大，通常表现出较差的循环稳定性。在本文中，首先通过静电纺丝将 SnOx 碳纳米纤维（SnOx@CNFs）以无纺毡的形式获得，然后在 500°C、0.02 MPa 的环境下进行煅烧。然后，我们使用简单的混合方法合成了 SnOx@CNF@graphene（SnOx@C@G）纳米复合材料。通过该技术，SnOx@CNFs 可以均匀地沉积在石墨烯纳米片（GNSs）上。高度分散的 SnOx@C@G 复合材料作为 LIBs 的阳极材料表现出增强的电化学性能。通过制备 SnOx@C@G 复合材料来提高电极性能的双重保护策略具有通用性。此外，这种双重保护策略可以扩展到金属氧化物和石墨烯纳米材料之间的各种复合材料的制造，在催化、传感、超级电容器和燃料电池等领域具有广阔的应用前景。
