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Xiong P, Zhang X, Zhang F, Yi D, Zhang J, Sun B, Tian H, Shanmukaraj D, Rojo T, Armand M, Ma R, Sasaki T, Wang G. Two-Dimensional Unilamellar Cation-Deficient Metal Oxide Nanosheet Superlattices for High-Rate Sodium Ion Energy Storage. ACS Nano 2018; 12:12337-12346. [PMID: 30427658 DOI: 10.1021/acsnano.8b06206] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cation-deficient two-dimensional (2D) materials, especially atomically thin nanosheets, are highly promising electrode materials for electrochemical energy storage that undergo metal ion insertion reactions, yet they have rarely been achieved thus far. Here, we report a Ti-deficient 2D unilamellar lepidocrocite-type titanium oxide (Ti0.87O2) nanosheet superlattice for sodium storage. The superlattice composed of alternately restacked defective Ti0.87O2 and nitrogen-doped graphene monolayers exhibits an outstanding capacity of ∼490 mA h g-1 at 0.1 A g-1, an ultralong cycle life of more than 10000 cycles with ∼0.00058% capacity decay per cycle, and especially superior low-temperature performance (100 mA h g-1 at 12.8 A g-1 and -5 °C), presenting the best reported performance to date. A reversible Na+ ion intercalation mechanism without phase and structural change is verified by first-principles calculations and kinetics analysis. These results herald a promising strategy to utilize defective 2D materials for advanced energy storage applications.
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Affiliation(s)
- Pan Xiong
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences , University of Technology Sydney , Sydney , NSW 2007 , Australia
- International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan
| | - Xiuyun Zhang
- College of Physical Science and Technology , Yangzhou University , Yangzhou 225002 , China
- Center for Multidimensional Carbon Materials , Institute for Basic Science (IBS) , Ulsan 44919 , Republic of Korea
| | - Fan Zhang
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences , University of Technology Sydney , Sydney , NSW 2007 , Australia
| | - Ding Yi
- Center for Multidimensional Carbon Materials , Institute for Basic Science (IBS) , Ulsan 44919 , Republic of Korea
| | - Jinqiang Zhang
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences , University of Technology Sydney , Sydney , NSW 2007 , Australia
| | - Bing Sun
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences , University of Technology Sydney , Sydney , NSW 2007 , Australia
| | - Huajun Tian
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences , University of Technology Sydney , Sydney , NSW 2007 , Australia
| | | | - Teofilo Rojo
- CIC ENERGIGUNE, Parque Tecnológico de Álava , Miñano 01510 , Spain
| | - Michel Armand
- CIC ENERGIGUNE, Parque Tecnológico de Álava , Miñano 01510 , Spain
| | - Renzhi Ma
- International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan
| | - Takayoshi Sasaki
- International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , Namiki 1-1 , Tsukuba , Ibaraki 305-0044 , Japan
| | - Guoxiu Wang
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences , University of Technology Sydney , Sydney , NSW 2007 , Australia
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