Honeycomb-Spherical Co3O4-TiO2 Hybrid Materials for Enhanced Lithium Storage. (20th December 2016)

• Record Type: Journal Article
• Authors: Li, Youpeng; Shang, Kaina; Zhou, Wenjie; Tan, Linyin; Pan, Xuexue; Liao, Mingna; Lei, Jianfei; Zhao, Lingzhi
• Is Part Of: Electrochimica acta. Volume 222(2016)
• Page Start: 1642
• Page End: 1649
• Publication Date: 2016-12-20
• Subjects: Lithium-ion battery -- Anode materials -- Co3O4 -- Honeycomb-spherical -- TiO2; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.11.153
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: The honeycomb-spherical Co3 O4 -TiO2 composite has been successfully synthesised though a hydrothermal method with deionized water and ethanol as solvent. The Co3 O4 -TiO2 composite displays a enhanced electrochemical performance compared with pure Co3 O4. Highlights: We introduces an effective route to prepare a honeycomb-spherical Co3 O4 -TiO2 anode material for lithium ion batteries. The composite shows improved cycling ability and rate performance when being used in half and full cells. The honeycomb-spherical Co3 O4 and the introduction of TiO2 are responsible for the enhanced electrochemical performance. Abstract: This work introduces an effective, inexpensive and large-scale production route to the fabrication of a novel honeycomb-spherical Co3 O4 -TiO2 nanocomposite anode material for use in rechargeable lithium ion batteries. The microstructure and phase composition of the Co3 O4 -TiO2 product were characterized systematically. The Co3 O4 -TiO2 nanocomposite electrode yielded fairly high reversible capacity of ∼1000 mAh/g at 200 mA/g after 100 cycles. Moreover, the electrode exhibited extraordinary rate ability and could regain its original specific capaities as reversing to the low current densities. Meanwhile, when being applied as anode material in full cells, it still achieved remarkably improved electrochemical performance compared with traditional graphite material. Noticeably, in-situ XRD measurement verified the conversion mechanism for the Co3 O4 -TiO2 electrode. The likely contributing factors to these outstanding electrochemical properties of the Co3 O4 -TiO2 nanocomposite could be related to the distinctive morphology including interlaced Co3 O4 nanoflakes (NFs) and the TiO2 nanoparticles (NPs), which contains superior structural stability and allows more channels for the Li + insertion/extraction reaction. This research shows that the as-prepared Co3 O4 -TiO2 nanocomposite could be suitable for use as a favorable cycle performance anode material for lithium ion batteries.