3D ordered mesoporous TiO2@CMK-3 nanostructure for sodium-ion batteries with long-term and high-rate performance. (25th March 2019)

• Record Type: Journal Article
• Authors: Zhang, Dongyang; Liu, Limin; Zhang, Yuan; Wu, Hu; Zheng, Yuansuo; Gao, Guoxin; Ding, Shujiang
• Is Part Of: Nanotechnology. Volume 30:Number 23(2019)
• Publication Date: 2019-03-25
• Subjects: TiO2 -- ordered mesoporous carbon -- 3D network structure -- pseudocapacitance contributions -- sodium ion batteries; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab0812
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Sodium ion battery is abundant in resources and costs low, making it very competitive in the large-scale energy storage devices. The anatase TiO2 electrode material with insertion/extraction mechanism shows stable cycling performance, which is more in line with the technical requirements of large-scale energy storage batteries. To improve the electrical conductivity and stability of the TiO2 electrode materials, we have synthesized anatase TiO2 and CMK-3 composite. TiO2 nanoparticles were deposited on the surface of CMK-3 by hydrothermal reaction, and the anode material of the SIBs with 3D network structure was prepared. With the CMK-3, the structure stability, conductivity and reaction kinetics of TiO2 @CMK-3 composite is improved. The electrochemical behavior is dominated by pseudocapacitance, which gives the material excellent high-rate performance. It delivers a reversible specific capacity of 186.3 mA h g −1 after 100 cycles at the current density of 50 mA g −1, 124.5 mA h g −1 after 500 long-term cycles, meanwhile it shows an outstanding rate performance, a reversible specific capacity of 105.9 mA h g −1 at 1600 mA g −1, 177.3 mA h g −1 when the current density drops to 50 mA g −1 .