Hollow silica spheres with facile carbon modification as an anode material for lithium-ion batteries

Microsphere‐Like SiO2/MXene Hybrid Material Enabling High Performance Anode for Lithium Ion Batteries

“…This is because of the elimination of Al in MAX and the addition of surface terminations (F, O, OH) in MXene, suggesting that the well‐delaminated MXene is successfully fabricated. The wide peak at 23° is a typical characteristic peak of SiO 2 , which is consistent with powder diffraction file card . The SiO 2 material is amorphous due to a broad diffraction peak in XRD in Figure a.…”

Improved NSGA-II Algorithm for Multi-objective Scheduling Problem in Hybrid Flow Shop

“…The TEM image of S/PAN/SiO2 composite were shown in Figure 2e,f, the "dark dots" were the amorphous SiO2 particles well-dispersed in the composite bulk, which agrees well with the wide peaks in the XRD patterns. The as-prepared ternary composite was enabled to maintain the homogeneous distribution of its components and unchanged morphology during discharge-charge cycling, and retain the reactive sites in its nanosized structure [35]. To further determine the chemical bonds in the S/PAN/SiO2 composite, the XPS analysis of the sample is shown in Figure 3a To further determine the chemical bonds in the S/PAN/SiO 2 composite, the XPS analysis of the sample is shown in Figure 3a-d.…”

Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

“…As the dominant component of sand, SiO 2 is naturally abundant and low‐cost with a relatively low but acceptable theoretical capacity of 1965 mAh g −1 . What's more, the silicate and Li 2 O produced during the lithium storage process are advantageous to buffer the volume change, thus enhancing the cycling stability of the electrodes .…”

“…Fortunately, the much simpler preparation procedure and structure design of synthetic SiO 2 compared with that of Si offer us the possibility to develop a well‐defined form of SiO 2 for LIBs application . The most common method is reducing the SiO 2 size to a nanoscale range and coupling it with carbon materials, which can minimize the Li + migrating path and enhance the conductivity of the electrodes, respectively. For example, An prepared carbon‐coated mesoporous hollow SiO 2 nanospheres via a two‐step method.…”

“…Nevertheless, to our knowledge, these strategies can be classified into two types: two‐step method by preparing nanoscale SiO 2 particles and then coupling them with carbon frameworks; electrospinning method or hydrothermal method by mixing the silica source (such as TEOS and tetramethoxysilane) with carbon source in a homogeneous solution . These strategies exhibit obvious defects: 1) tedious and time‐consuming procedures in two‐step methods; 2) inhomogeneous nanostructure: carbon layers may stack into carbon bulks during the dipping‐carbonizing process, and the inside SiO 2 particles tend to aggregate into larger particles at a relatively high SiO 2 content; 3) limitation of the performance optimization owing to the uncontrollable nanostructure.…”