A Highly Resilient Mesoporous SiOx Lithium Storage Material Engineered by Oil–Water Templating. Issue 4 (9th January 2015)

• Record Type: Journal Article
• Authors: Park, Eunjun; Park, Min‐Sik; Lee, Jaewoo; Kim, Ki Jae; Jeong, Goojin; Kim, Jung Ho; Kim, Young‐Jun; Kim, Hansu
• Is Part Of: ChemSusChem. Volume 8:Issue 4(2015:Feb.)
• Page Start: 688
• Page End: 694
• Publication Date: 2015-01-09
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201402907
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Mesoporous silicon‐based materials gained considerable attention as high‐capacity lithium‐storage materials. However, the practical use is still limited by the complexity and limited number of available synthetic routes. Here, we report carbon‐coated porous SiO_{<italic>x</italic>} as high capacity lithium storage material prepared by using a sol–gel reaction of hydrogen silsesquioxane and oil–water templating. A hydrophobic oil is employed as a pore former inside the SiO_{<italic>x</italic>} matrix and a precursor for carbon coating on the SiO_{<italic>x</italic>}. The anode exhibits a high capacity of 730 mAh g⁻¹ and outstanding cycling performance over 100 cycles without significant dimensional changes. Carbon‐coated porous SiO_{<italic>x</italic>} also showed highly stable thermal reliability comparable to that of graphite. These promising properties come from the mesopores in the SiO_{<italic>x</italic>} matrix, which ensures reliable operation of lithium storage in SiO_{<italic>x</italic>}. The scalable sol–gel process presented here can open up a new avenue for the versatile preparation of porous SiO_{<italic>x</italic>} lithium storage materials.</p> </abstract>