Preparation of silicon oxycarbide (SiOC) anodes for high performance Li-ion batteries using competitive relationship between crosslinking and polymerization

Synthesis of Silicon Oxycarbide Beads from Alkoxysilane as Anode Materials for Lithium-Ion Batteries

“…The intensity ratios I D / I G of DM0 and DM1 were 4.69 and 1.31, respectively. This indicates that defects of carbon were also less in DM1 …”

“…As the number of cycles increased, the cells using the SiOC anodes with DMDMS decayed more slowly than the one without DMDMS. From Table 5 , more free carbon on the surface of the DM1 SiOC anode might be of help to its cyclability, 29 as compared to that of DM0. On the other hand, the SiOC DM0 + 5%APS anode indicated that simply adding APS could not improve the cycle performance.…”

“…This indicates that defects of carbon were also less in DM1. 29 Table 3 shows the elemental composition of SiOC beads calcined at different temperatures in an argon atmosphere, and the molar ratio of SiOCs is expressed as SiO 2-2x C x + C free, 30 where C free is the carbon not bonded to silicon. We could see that as the calcination temperature increased, the O/Si ratio decreased accordingly.…”

One-step synthesis of uniformly distributed SiOx–C composites as stable anodes for lithium-ion batteries

“…The charge and discharge curves of the SiO x –C@CNT-900 electrode are consistent with previous reports on SiO x /C composites. 36,37…”

Hydrophobic dispersion-derived Si/rGO nanocomposites in SiOC ceramic matrix as anode materials for high performance lithium-ion batteries

“…In this regard, silicon oxycarbide (SiOC) has recently attracted attention owing to its superior mechanical stability and high theoretical capacity (∼750 mA h g −1 ). 23,24 It is a ceramic material with an amorphous tetrahedral phase, which contributes to the high reversible capacity by simultaneously bonding carbon and oxygen to silicon, and has the advantage of high conductivity owing to the randomly existing free carbon domain. 25 In addition, SiOC is more elastic than the carbonbased material, and unlike silicon anodes, the volume expansion is relatively small; therefore, SiOC is effective as a buffer material to function as the mechanical support.…”