Direct Synthesis of Carbon-Doped TiO2鈥揃ronze Nanowires as Anode Materials for High Performance Lithium-Ion Batteries

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• 作者：Subrahmanyam Goriparti ; Ermanno Miele ; Mirko Prato ; Alice Scarpellini ; Sergio Marras ; Simone Monaco ; Andrea Toma ; Gabriele C. Messina ; Alessandro Alabastri ; Francesco De Angelis ; Liberato Manna ; Claudio Capiglia ; Remo Proietti Zaccaria
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 18, 2015
• 年：2015
• 卷：7
• 期：45
• 页码：25139-25146
• 全文大小：542K
• ISSN：1944-8252

文摘

Carbon-doped TiO₂鈥揵ronze nanowires were synthesized via a facile doping mechanism and were exploited as active material for Li-ion batteries. We demonstrate that both the wire geometry and the presence of carbon doping contribute to the high electrochemical performance of these materials. Direct carbon doping for example reduces the Li-ion diffusion length and improves the electrical conductivity of the wires, as demonstrated by cycling experiments, which evidenced remarkably higher capacities and superior rate capability over the undoped nanowires. The as-prepared carbon-doped nanowires, evaluated in lithium half-cells, exhibited lithium storage capacity of 鈭?06 mA h g^鈥? (91% of the theoretical capacity) at the current rate of 0.1C as well as excellent discharge capacity of 鈭?60 mAh g^鈥? even at the current rate of 10 C after 1000 charge/discharge cycles.