Graphene-Rich Wrapped Petal-Like Rutile TiO₂ tuned by Carbon Dots for High-Performance Sodium Storage

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• 作者：Yan Zhang ; Christopher W. Foster ; Craig E. Banks ; Lidong Shao ; Hongshuai Hou ; Guoqiang Zou ; Jun Chen ; Zhaodong Huang and Xiaobo Ji
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：November 9, 2016
• 年：2016
• 卷：28
• 期：42
• 页码：9391-9399
• 全文大小：1753K
• ISSN：1521-4095

文摘

Carbon dots inducing petal-like rutile TiO₂ wrapped by ultrathin graphene-rich layers are proposed to fabricate superior anodes for sodium-ion batteries, featuring high-rate capabilities and long-term cyclelife, benefiting from promoted electron transport and a shortened Na⁺ diffusion length. High capacities of 144.4 mA h g⁻¹ (at 837.5 mA g⁻¹) after 1100 cycles and 74.6 mA h g⁻¹ (at 3350 mA g⁻¹) after 4000 cycles are delivered outstandingly.