Yue Chenghao, Liu Yao, Guan Shaoliang, Fereydooni Alireza, Zeng Yuexi, Wei Zhijie, Wang Yonggang, Chao Yimin
School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
Department of Chemistry, Fudan University, Shanghai 200433, China.
Materials (Basel). 2023 Aug 28;16(17):5884. doi: 10.3390/ma16175884.
Silicon has been proven to be one of the most promising anode materials for the next generation of lithium-ion batteries for application in batteries, the Si anode should have high capacity and must be industrially scalable. In this study, we designed and synthesised a hollow structure to meet these requirements. All the processes were carried out without special equipment. The Si nanoparticles that are commercially available were used as the core sealed inside a TiO shell, with rationally designed void space between the particles and shell. The Si@TiO were characterised using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The optimised hollow-structured silicon nanoparticles, when used as the anode in a lithium-ion battery, exhibited a high reversible specific capacity over 630 mAhg, much higher than the 370 mAhg from the commercial graphite anodes. This excellent electrochemical property of the nanoparticles could be attributed to their optimised phase and unique hollow nanostructure.
硅已被证明是下一代锂离子电池最有前景的负极材料之一。对于电池应用而言，硅负极应具备高容量且必须在工业上可扩展。在本研究中，我们设计并合成了一种空心结构以满足这些要求。所有过程均在无特殊设备的情况下进行。将市售的硅纳米颗粒用作核心，密封在TiO壳内，颗粒与壳之间具有合理设计的空隙空间。使用X射线衍射（XRD）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对Si@TiO进行了表征。优化后的空心结构硅纳米颗粒用作锂离子电池的负极时，表现出超过630 mAh/g的高可逆比容量，远高于商业石墨负极的370 mAh/g。这些纳米颗粒优异的电化学性能可归因于其优化的相和独特的空心纳米结构。
