Gong, Sanghyuk Lee, Yeongje Choi, Jinkwan Lee, Minah Chung, Kyung Yoon Jung, Hun-Gi Jeong, Sunho Kim, Hyung-Seok 2024-01-19T10:00:39Z 2024-01-19T10:00:39Z 2023-02-03 2023-04 1613-6810 https://pubs.kist.re.kr/handle/201004/113890 SiOx is a promising next-generation anode material for lithium-ion batteries. However, its commercial adoption faces challenges such as low electrical conductivity, large volume expansion during cycling, and low initial Coulombic efficiency. Herein, to overcome these limitations, an eco-friendly in situ methodology for synthesizing carbon-containing mesoporous SiOx nanoparticles wrapped in another carbon layers is developed. The chemical reactions of vinyl-terminated silanes are designed to be confined inside the cationic surfactant-derived emulsion droplets. The polyvinylpyrrolidone-based chemical functionalization of organically modified SiO2 nanoparticles leads to excellent dispersion stability and allows for intact hybridization with graphene oxide sheets. The formation of a chemically reinforced heterointerface enables the spontaneous generation of mesopores inside the thermally reduced SiOx nanoparticles. The resulting mesoporous SiOx-based nanocomposite anodes exhibit superior cycling stability (approximate to 100% after 500 cycles at 0.5 A g(-1)) and rate capability (554 mAh g(-1) at 2 A g(-1)), elucidating characteristic synergetic effects in mesoporous SiOx-based nanocomposite anodes. The practical commercialization potential with a significant enhancement in initial Coulombic efficiency through a chemical prelithiation reaction is also presented. The full cell employing the prelithiated anode demonstrated more than 2 times higher Coulombic efficiency and discharge capacity compared to the full cell with a pristine anode. English Wiley - V C H Verlag GmbbH & Co. In Situ Mesopore Formation in SiOx Nanoparticles by Chemically Reinforced Heterointerface and Use of Chemical Prelithiation for Highly Reversible Lithium-Ion Battery Anode Article 10.1002/smll.202206238 1 Small, v.19, no.16 Small 19 16 N scie scopus 000908902100001 2-s2.0-85146093849 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article; Early Access COMPOSITE ANODES ENERGY-STORAGE POROUS SILICON PERFORMANCE GRAPHENE DESIGN anodes lithium-ion batteries mesoporous prelithiation SiOx nanoparticles