Investigation into the role of silica in lithium polysulfide adsorption for lithium sulfur battery. (September 2015)

• Record Type: Journal Article
• Authors: Kim, Miso; Kang, Sung-Hwan; Manuel, James; Zhao, Xiaohui; Cho, Kwon Koo; Ahn, Jou Hyeon
• Is Part Of: Materials research bulletin. Volume 69(2015:Sep.)
• Page Start: 29
• Page End: 35
• Publication Date: 2015-09
• Subjects: B. Chemical synthesis -- C. Electrochemical measurements -- C. Infrared spectroscopy -- D. Electrochemical properties -- D. Energy storage; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2014.11.004
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Amine functionalized silica nanoparticles (AFSN) were prepared. Polysulfide adsorption studies were carried out with silica nanoparticles and AFSN. Sulfur cathodes were prepared with SN and AFSN for Li–S batteries. AFSN showed excellent polysulfide adsorption. Abstract: A new type of sulfur electrodes with the ability for polysulfide adsorption was prepared by incorporating silica nanoparticles (SN) or amine functionalized silica nanoparticles (AFSN). AFSN was synthesized by a simple and cost-effective method. The functionalization and surface morphology of silica were confirmed with Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. Polysulfide adsorption studies were carried out using UV–vis spectrometer, which confirmed the excellent adsorption of polysulfides by AFSN. Interaction of polysulfides with SN or AFSN was studied using FTIR and FT-Raman spectroscopy. The effective polysulfide adsorption by SN and AFSN leads to good and stable cycle performance of lithium sulfur cells. The results show that the incorporation of SN or AFSN with sulfur is a promising method to prepare cathode material for lithium sulfur batteries.