Binary Lithium Titanate–Titania Nanocomposite Thin‐Film Electrodes for Electrochemical Energy Storage. Issue 7 (8th April 2016)

• Record Type: Journal Article
• Authors: Yu, Zhaozhe; Xu, Huarui; Zhu, Guisheng; Yan, Dong Liang; Yu, Aibing
• Is Part Of: Energy technology. Volume 4:Issue 7(2016:Jul.)
• Page Start: 798
• Page End: 803
• Publication Date: 2016-04-08
• Subjects: charge storage -- composites -- intercalation -- lithium-ion batteries -- thin films; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201600035
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract: This work introduces a facile approach for preparation of binary nanocomposite thin film electrodes for lithium‐ion batteries with excellent storage capability, high rate performance, and good electrochemical stability. The Li4 Ti5 O12 ‐TiO2 film electrodes are prepared by radio frequency (RF) magnetron sputtering deposition using a Li4 Ti5 O12 and TiO2 powder mixture target as sputtering source in an argon atmosphere. The Li4 Ti5 O12 –TiO2 electrode yields good electrochemical performance in terms of high capacity (295 mAh g −1 ) at a current density of 0.1 C, good cycling stability (≈5 % capacity loss after 100 cycles at 0.1 C), and excellent rate capability (158 mAh g −1 at a current density of 5 C). The factors contributing to the excellent electrochemical performance are related to the binary nanocomposite structure. The results suggest that the Li4 Ti5 O12 –TiO2 nanocomposite thin film can be used as an anode material for high‐performance lithium‐ion batteries. Abstract : No grain no gain : Fabricating binary nanocomposite structures with a high grain boundary density in a thin film is a simple yet very effective approach to enhance ion conductivity. A facile approach is used to prepare binary Li4 Ti5 O12 –TiO2 nanocomposite thin film electrodes with excellent storage capability, high‐rate performance, and good electrochemical stability for lithium‐ion batteries. This opens up new opportunities in constructing high‐performance miniaturized energy storage devices.