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Self-supporting TiO2@NiCo2S4 Arrays Composite on the Flexible Ti Foil for a High-performance Asymmetric Supercapacitors |
LI Han1,SUN Zhipeng1,2,,JIA Dianzeng1,
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1 Key Laboratory of Energy Material Chemistry (Ministry of Education),Institute of Applied Chemistry,Xinjiang University,Urumqi 830046,China
2 Materials and Energy school,Guangdong University of Technology,Guangzhou Higher Education Mega Center,Panyu District,Guangzhou 510006,China |
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Abstract Wearable electronic devices have attracted significant attention owing to their very high portability. However, the implementation of these electronic devices places high requirements on corresponding power supply systems, such as light weight, high flexibility, high energy and power densities. We attempt to use metal foil as electrodes for flexibility supercapacitors(SCs), which offer unique properties such as high mechanical strength and high electrochemical capacitance. Nowadays, Highly ordered TiO2 nanobelts@NiCo2S4 nanoplates core/shell arrays on the Ti foil substrate (TiO2@NiCo2S4) have been controllable fabricated via a stepwise hydrothermal approach and further investigated as additive-free anode materials for SCs exhibit a positive synergistic effect and display high capacity, good rate capacity and excellent cycle stabi-lity. The unique structure not only greatly promotes the transmission of electrons and charges, but also effectively reduces the volume expansion in redox reaction, and has good electrochemical performance in terms of specific capacitance and rate capability. Furthermore, the asymmetric supercapacitors based on TiO2@NiCo2S4//coal-based porous carbon electrodes demonstrate a high energy density (41.6 Wh·kg-1 at 400 W·kg-1) . To verify the feasibility of TiO2@NiCo2S4//CPC capacitors for energy supply, a two-series battery was assembled to drive the green LED. The device can power the LED for 10 minutes. The design of this interwoven three-dimensional (3D) frame architecture and flexible substrate opens up new opportunities to obtain high comprehensive performance flexible substrate electrode materials in the energy storage field.
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Published: 15 January 2020
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Fund:This work was financially supported by the National Natural Science Foundation of China (21663029, 21461024, 21301147, 21661029), the Guangdong Introducing Innovative and Enterpreneurial Team (2016ZT06C412), the Guangdong University of Technology Hundred Talents Program (220418136). |
About author:: Han Li received her M.S. degree in June 2019 from Xinjiang University. Focusing on the Design, preparation and basic Application of Electrochemical Supercapacitor Materials. Zhipeng Sun, Ph.D. supervisor, School of Materials and Energy, Guangdong University of Technology. Graduated from Nanjing University of Aeronautics and Astronautics. His research interest is mainly engaged in the synthesis and assembly of the chemical power supply and the electrode material, mainly comprises the design, the preparation and the basic application research of the negative electrode material of the lithium ion battery and the electrochemical supercapacitor material, the design, the synthesis and the biological detection of the noble metal-based composite nano-assembly structure, research on the application of chemical sensing and electrocatalysis. Dianzeng Jia, vice president of Xinjiang University,director of Institute of Applied Chemistry, Xinjiang University, received his Ph.D. in material physics and chemical engineering, Sichuan University. Mainly engaged in low-heat solid-phase chemical reaction, coal-based carbon material and energy storage material. |
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