Controllable Synthesis of TiO2@Fe2O3 Core-Shell Nanotube Arrays with Double-Wall Coating as Superb Lithium-Ion Battery Anodes

• DOI: 10.1038/srep40927
• Publication Date: 2017-01-18T11:57:26Z
• Authors: Yan Zhong; Yifan Ma; Qiubo Guo; Jiaqi Liu; Yadong Wang; Mei Yang; Hui Xia
• Keywords: Titanium oxide

Highlighted by the safe operation and stable performances, titanium oxides (TiO2) are deemed as promising candidates for next generation lithium-ion batteries (LIBs). However, pervasively low capacity is casting shadow on desirable electrochemical behaviors obscuring their practical applications. In this work, we reported a unique template-assisted two-step atomic layer deposition (ALD) method to achieve TiO2@Fe2O3 core-shell nanotube arrays with hollow interior double-wall coating. The as-prepared architecture combines both merits of high specific Fe2O3 structural stability TiO2 backbone. Owing nanotubular advantages integrating facile strain relaxation well rapid ion electron transport, mass loading attained ~520 mA h g-1, exhibiting good rate capability under uprated current density 10 A g-1 especially enhanced cycle (~450 after 600 cycles), outclassing most TiO2@metal oxide composites. results not only provide new avenue hybrid formation, but also offer an insight rational design advanced electrode materials LIBs.