Tin selenide has been considered as one of the most promising anode materials for lithium-ion battery owing to its high theoretical capacity. In this work, a facile colloidal synthetic method was successfully used to obtain nanocomposites comprising ~7 nm SnSe nanocrystals and carbon nanotubes (SnSe NC/CNT). When applied as anode materials in lithium-ion battery, the SnSe NC/CNT nanocomposites exhibited excellent electrochemical performance with a reversible capacity of 706.5 mAh g⁻¹ after 300 cycles at a constant current density of 200 mA g⁻¹. The SnSe NC/CNT nanocomposites also delivered the high reversible capacity of 532.0 mAh g⁻¹ at a high current density of 1.0 A g⁻¹. The SnSe nanocomposites are advantageous to the ion and electron transport. Interconnected by CNT after annealing at 200 °C, SnSe NC/CNT nanocomposites can accommodate the volume expansion even after 300 cycles. The complex conversion and alloying reaction are studied by X-ray diffraction and X-ray absorption near edge structure.

硒化锡因其高理论容量而被认为是最有前途的锂离子电池负极材料之一。在这项工作中，成功地使用一种简便的胶体合成方法获得了包含~7 nm SnSe 纳米晶体和碳纳米管 (SnSe NC/CNT) 的纳米复合材料。当用作负极材料中的锂离子电池应用中，位SnSe NC / CNT纳米复合材料显示出优异的电化学性能用的706.5毫安g的可逆容量^-1处的200毫安g的恒定电流密度下300次循环后^-1。SnSe NC/CNT 纳米复合材料还在1.0 A g ^-1的高电流密度下提供了 532.0 mAh g ^-1的高可逆容量. SnSe 纳米复合材料有利于离子和电子传输。SnSe NC/CNT 纳米复合材料在 200 °C 退火后通过 CNT 互连，即使在 300 次循环后也能适应体积膨胀。通过X射线衍射和X射线吸收近边结构研究了复杂的转化和合金化反应。