Facile Scalable Synthesis of TiO2/Carbon Nanohybrids with Ultrasmall TiO2 Nanoparticles Homogeneously Embedded in Carbon Matrix

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• 作者：Xiaoyan Wang ; Jian-Qiang Meng ; Meimei Wang ; Ying Xiao ; Rui Liu ; Yonggao Xia ; Yuan Yao ; Ezzeldin Metwalli ; Qian Zhang ; Bao Qiu ; Zhaoping Liu ; Jing Pan ; Ling-Dong Sun ; Chun-Hua Yan ; Peter M眉ller-Buschbaum ; Ya-Jun Cheng
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 4, 2015
• 年：2015
• 卷：7
• 期：43
• 页码：24247-24255
• 全文大小：760K
• ISSN：1944-8252

文摘

A facile scalable synthesis of TiO₂/C nanohybrids inspired by polymeric dental restorative materials has been developed, which creates ultrasmall TiO₂ nanoparticles homogeneously embedded in the carbon matrix. The average size of the nanoparticles is tuned between about 1 and 5 nm with the carbon content systematically increased from 0% to 65%. Imaging analysis and a scattering technique have been applied to investigate the morphology of the TiO₂ nanoparticles. The composition, nature of carbon matrix, crystallinity, and tap density of the TiO₂/C nanohybrids have been studied. The application of the TiO₂/C nanohybrids as lithium-ion battery anode is demonstrated. Unusual discharge/charge profiles have been exhibited, where characteristic discharge/charge plateaus of crystalline TiO₂ are significantly diminished. The tap density, cyclic capacities, and rate performance at high current densities (10 C, 20 C) of the TiO₂/C nanohybrid anodes have been effectively improved compared to the bare carbon anode and the TiO₂/C nanohybrids with larger particle size.