Yolk–Shell TiO2@C Nanocomposite as High-Performance Anode Material for Sodium-Ion Batteries

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• 作者：Shen Qiu ; Lifen Xiao ; Xinping Ai ; Hanxi Yang ; Yuliang Cao
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：January 11, 2017
• 年：2017
• 卷：9
• 期：1
• 页码：345-353
• 全文大小：551K
• ISSN：1944-8252

文摘

Yolk–shell TiO₂@C nanocomposites have been synthesized successfully through a simple self-catalyzing solvothermal method. The structural and morphological characterizations reveal that TiO₂@C nanocomposite has a yolk–shell microsphere morphology with diameters of 1–2 μm, and both yolk and shell are composed of TiO₂ nanoparticles (∼10 nm). The as-prepared yolk–shell TiO₂@C composites exhibit superior sodium storage properties, with a specific capacity of 210 mAh g^–1, an outstanding cycle life of 85% capacity retention of 2000 cycles and extraordinary rate performance at 40 C rate. All the results indicate that the yolk–shell TiO₂@C nanocomposite can be suggested as a promising anode material for high-performance sodium-ion batteries.