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Author Chen, Minghua ♦ Qi, Meili ♦ Yin, Jinghua ♦ Chen, Qingguo
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CAPACITORS ♦ ELECTROCHEMISTRY ♦ ELECTRON TRANSFER ♦ ENERGY CONVERSION ♦ ENERGY STORAGE ♦ HYDROTHERMAL SYNTHESIS ♦ IONS ♦ NANOSTRUCTURES ♦ NICKEL HYDROXIDES ♦ OXIDATION ♦ POROUS MATERIALS ♦ SURFACE AREA ♦ THIN FILMS ♦ TITANIUM OXIDES
Abstract Highlights: • Construct TiO{sub 2}/Ni(OH){sub 2} core/shell arrays by ALD-assisted HS method. • Ni(OH){sub 2} nanoflake shells show high energy storage. • Porous core/shell structure is favorable for fast ion/electron transfer. - Abstract: Integration of different functional materials into core/shell composite arrays is of great importance for high-performance energy storage. In this work, we controllably synthesize Ni(OH){sub 2} nanoflake shell on the single-crystalline TiO{sub 2} nanorod cores forming composite core/shell arrays (CSAs). Interconnected Ni(OH){sub 2} nanoflakes of 20–30 nm are uniformly coated on the TiO{sub 2} nanorods of 80–120 nm via atomic layer deposition assisted hydrothermal method. Furthermore, porous network with numerous nanopores and large surface area is formed in this core/shell structure. In view of this advantageous architecture, the designed Ni(OH){sub 2}/TiO{sub 2} CSAs are studied as cathode of alkaline batteries and show high energy storage performance with a capacity of 121 mAh g{sup −1} at 1 A g{sup −1} and 91 mAh g{sup −1} at 5 A g{sup −1}, respectively. The boosted electrochemical properties are owing to the porous core/shell architecture with improved active area and accelerated ion/electron transfer characteristics.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-12-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 96


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