期刊
NANO ENERGY
卷 12, 期 -, 页码 709-724出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2014.12.019
关键词
Graphene-like; Lithium-containing ternary oxides; Layer-by-layer; Sandwich-like rianostructures; Lithium ion batteries
类别
资金
- National Natural Science Foundation of China [51202297, 51472271, 51002189]
- Program for New Century Excellent Talents in University [NCET-12 0554]
- National Basic Research Program of China (973 Program) [2013CB932901]
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [KC020105-FWP12152]
- DOE by Battelle [DE AC05-76RL01830]
Two-dimensional (2D) graphene-like inorganic materials, because of the short lithium ion diffusion path and unique 2D carrier pathways, become a new research focus of the lithium storages. Some graphene-like binary compounds, such as, MnO2, MoS2 and VO2 ultrathin nanosheets, have been synthesized by the peeling method, which also exhibit enhanced lithium storage performances. However, it still remains a great challenge to synthesize widely-used lithium-containing ternary oxides with graphene-like nanostructures, because the lithium-containing ternary oxides, unlike ternary layered double hydroxides (LDH), are very hard to be directly peeled. Herein, we successfully synthesized ultrathin Li3VO4 nanoribbons with a thickness of about 3 nm by transformation from ultrathin V2O5 xH(2)O nanoribbons, moreover, we achieved the preparation of ultrathin Li3VO4 nanoribbon@graphene sandwich-like nanostructures (LVO/G) through the layer-by-layer assembly method. The unique sandwich-like nanostructures shows not only a high specific reversible capacitance (up to 452.5 mA h g(-1) after 200 cycles) but also an excellent cycling performance (with more than 299.2 mA h g(-1) of the capacity at 10C after 1000 cycles) as well as very high rate capability. Such template strategy, using graphene-like binary inorganic nanosheets as templates to synthesize lithium-containing ternary oxide nanosheets, may be extended to prepare other ternary oxides with graphene-like nanostructures. (C) 2015 Elsevier Ltd. All rights reserved.
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