Na2 Ti6 O13 Nanorods with Dominant Large Interlayer Spacing Exposed Facet for High-Performance Na-Ion Batteries.
As the delegate of tunnel structure sodium titanates, Na2 Ti6 O13 nanorods with dominant large interlayer spacing exposed facet are prepared. The exposed large interlayers provide facile channels for Na(+) insertion and extraction when this material is used as anode for Na-ion batteries (NIBs). After an activation process, this NIB anode achieves a high specific capacity (a capacity of 172 mAh g(-1) at 0.1 A g(-1) ) and outstanding cycling stability (a capacity of 109 mAh g(-1) after 2800 cycles at 1 A g(-1) ), showing its promising application on large-scale energy storage systems. Furthermore, the electrochemical and structural characterization reveals that the expanded interlayer spacings should be in charge of the activation process, including the enhanced kinetics, the lowered apparent activation energy, and the increased capacity.
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
Kangzhe
K
Cao
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.|Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China.
Lifang
L
Jiao
School of Mechanical, Materials and Mechatronic Engineering Institute for Superconducting & Electronic Materials, Faculty of Engineering, University of Wollongong, NSW, 2522, Australia.
Wei Kong
WK
Pang
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
Huiqiao
H
Liu
School of Mechanical, Materials and Mechatronic Engineering Institute for Superconducting & Electronic Materials, Faculty of Engineering, University of Wollongong, NSW, 2522, Australia.
Tengfei
T
Zhou
School of Mechanical, Materials and Mechatronic Engineering Institute for Superconducting & Electronic Materials, Faculty of Engineering, University of Wollongong, NSW, 2522, Australia.
Zaiping
Z
Guo
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
Yijing
Y
Wang
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China.
Huatang
H
Yuan
Na-ion batteries; enhanced kinetics; large interlayer spacing; sodium titanates; tunnel structures