期刊
NANO LETTERS
卷 16, 期 7, 页码 4544-4551出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b01805
关键词
Sodium-ion battery; hydrogenation; nanoarray; rate capability
类别
资金
- National Natural Science Foundation of China [51302181, 51372159, 51422206, 21401135]
- Thousand Youth Talents Plan
- Jiangsu Shuangchuang Plan
- Jiangsu Natural Science Foundation [BK20151219, BK20140009, BK20140304]
- China Postdoctoral Science Foundation [2015T80580]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Collaborative Innovation Center of Suzhou Nano Science and Technology
We present a general and rational approach to fabricate highly accessible and affordable sodium-ion battery anodes by engineering three-dimensional hydrogenated Na2Ti3O7 nanoarrays supported on flexible Ti substrates. The hydrogenated Na2Ti3O7 nanoarrays exhibit desirable properties for sodium storage, such as high surface area, high electrical conductivity, and Na+ diffusivity. The as-obtained nanoarrays demonstrate remarkably stable and robust Na-storage performance when tested as binder-free anodes for sodium-ion battery. They can afford a high reversible (desodiation) capacity of 227 mAh g(-1) and retain a capacity of 65 mAh g(-1) over 10,000 continuous cycles at a high rate of 35 C. Therefore, through this synergy of array architecture and hydrogenation, it is possible to engineer numerous anodes that can reversibly store Na+ ions in a fast and stable manner.
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