Effect of Anatase TiO2 on Electrochemical Properties of Elongated Bending TiO2-Bronze nanowires for Lithium Ion Batteries. (10th February 2016)

• Record Type: Journal Article
• Authors: Yan, Xiao; Liu, Wei; Yan, Wenchao; Sun, Deye; Jin, Yongcheng; Wang, Jing; Xiang, Lan; Munakata, Hirokazu; Kanamura, Kiyoshi
• Is Part Of: Electrochimica acta. Volume 191(2016)
• Page Start: 661
• Page End: 668
• Publication Date: 2016-02-10
• Subjects: Titanium dioxide -- Bronze -- Anatase -- Heterojunction -- Lithium-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.01.136
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: TiO2 -bronze/anatase TiO2 samples were prepared by stirring hydrothermal method. Materials have elongated bending fibril morphology. The ratio of TiO2 -bronze and anatase TiO2 constituents can be adjusted. Optimized materials have excellent cycle stability and rate capability. Abstract: Exploring anode materials with excellent safety, high capacities and superior rate performance for lithium ion batteries remains a persistent objective. Herein, TiO2 -bronze/anatase TiO2 hybrid nanowires are successfully prepared through a facile stirring hydrothermal method, which have elongated bending wire morphology and a heterojunction structure with TiO2 -bronze and anatase TiO2 nanocrystal. The ratio of the two constituents can be easily adjusted by controlling the hydrothermal time, of which the growing orientation of the major TiO2 -bronze is along <110> direction that facilitates the transport of Li + ions. More importantly, the optimized hybrid material with 8.21% of anatase has superior electrochemical performances in terms of specific capacities, rate capability and cycling stability. Typically, the material shows a discharge capacity of 230.6 m Ah g −1 at 1C rate with a capacity retention of 99% after 80 cycles, and also displays a discharge capacity of 145.7 mA h g −1 even at a higher rate of 30C, which make it as promising anode material for high power rechargeable batteries.