Fabrication of Porous SiO<sub>2</sub>@MXene Freestanding Electrode for Minimal Volumetric Expansion
발표자
()
초록
내용
MXene, a two-dimensional(2D) material, has been widely applicated in energy storage because of its excellent electrical conductivity, and high mechanical strength. In our work, we fabricated porous SiO2 and titanium carbide(Ti3C2Tx) MXene composite (porous SiO2@MXene) as a freestanding electrode. The pores are beneficial to compensate for the expansion of SiO2particles, resulting in minimal volumetric expansion of the electrode. The porous electrode can be made using polystyrene(PS) nanoparticles as sacrificial templates, and all the components were homogeneously mixed in water without any treatment. By etching PS nanoparticles with tetrahydrofuran(THF), the porous SiO2@MXene electrode was fabricated without a high-temperature process. We characterized the material properties using atomic force microscopy(AFM), UV-vis spectroscopy, and energy dispersion X-ray spectroscopy(EDS). The structure of each electrode was observed through scanning electron microscopy(SEM)