Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Application In Synthesis of 1-Bromo-4-ethynylbenzene, 766-96-1, Name is 1-Bromo-4-ethynylbenzene, molecular formula is C8H5Br, belongs to bromides-buliding-blocks compound. In a document, author is Jang, Jihye, introduce the new discover.
Surfactant-based selective assembly approach for Si-embedded silicon oxycarbide composite materials in lithium-ion batteries
High-capacity silicon anode materials have attracted significant attention for application in lithium-ion batteries (LIBs), even though the drastic volumetric changes of the silicon materials result in rapid capacity degradation. Here, an Si-embedded silicon oxycarbide (SiOC) was synthesized using a selective assembly-based method. We utilized cetrimonium bromide (CTAB), a cationic surfactant, to facilitate interfacial interactions between Si nanoparticles and silicone oil using the hydrophobic property of the CTAB tail groups. The synthesis method includes a simple pyrolysis process at 900 degrees C followed by the surface modification of Si nanoparticles with the CTAB surfactant to obtain a SiOC matrix with homogeneously embedded Si particles. The final composite exhibits improved electrochemical properties as a LIB anode material and displays a stable cycle life (1312 mAh.g(-1) for the 100th cycle at 0.5 A.g(-1)) in addition to enhanced power characteristics (634 mAh.g(-1) at the high current density of 5 A.g(-1)). The SiOC matrix effectively suppressed the volumetric change of the inner Si particles in addition to enhancing the conductivity due to the free carbon in SiOC materials.
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