松针状NiCo2O4@碳布复合材料在锂硫电池中的应用

以碳布（CC）作为柔性基底，采用水热法在其表面原位生长松针状网络结构NiCo₂O₄，制得NiCo₂O₄@CC复合材料，并应用于锂硫电池。NiCo₂O₄在碳纤维表面竖直生长形成三维纳米针簇网络，为硫的存储提供更多的空间，有效缓解硫电极的体积膨胀。通过吸附实验，证明了NiCo₂O₄@CC能有效吸附多硫化物，从而抑制多硫化物的穿梭效应。与CC/S相比（933 mAh·g^-1），NiCo₂O₄@CC/S复合材料用于锂硫电池具有更优异的电池性能，在0.1C下初始放电比容量高达1 467 mAh·g^-1，在0.2C下初始放电比容量为1 098 mAh·g^-1，经200次循环后，放电比容量仍然保持在879 mAh·g^-1，平均每圈衰减率为0.09%，表现出良好的循环性能。

Application of Needle-like NiCo2O4@Carbon Cloth Composites in Lithium-Sulfur Batteries

Using carbon cloth (CC) as a flexible substrate, needle-like network structure NiCo₂O₄ was grown on the surface of CC by hydrothermal method, and then NiCo₂O₄@CC composites were prepared and used for lithium-sulfur battery. NiCo₂O₄ grows vertically on the surface of carbon fiber to form a three-dimensional network of nano-needle clusters, which provides more space for sulfur storage and effectively alleviates the volume expansion of sulfur electrode. Through adsorption experiments, it is proved that NiCo₂O₄@CC can effectively adsorb polysulfide, thus inhibiting the shuttle effect of polysulfide. Compared with CC/S (933 mAh·g^-1), NiCo₂O₄@CC/S composite had better battery performance. The initial discharge specific capacity was as high as 1 467 mAh·g^-1 at 0.1C, and the initial discharge specific capacity was 1 098 mAh·g^-1 at 0.2C, the discharge specific capacity can remain 879 mAh·g^-1 even after 200 cycles, and the average decay rate of each cycle was 0.09%, showing good cycle performance.