Enhanced electrochemical performance of a novel Li4Ti5O12 composite as anode material for lithium-ion battery in a broad voltage window. Issue 2 (March 2015)

• Record Type: Journal Article
• Authors: Yi, Ting-Feng; Fang, Zi-Kui; Deng, Li; Wang, Lei; Xie, Ying; Zhu, Yan-Rong; Yao, Jin-Han; Dai, Changsong
• Is Part Of: Ceramics international. Volume 41:Issue 2(2015)Part A
• Page Start: 2336
• Page End: 2341
• Publication Date: 2015-03
• Subjects: Lithium-ion battery -- Li4Ti5O12 -- Li2TiO3 -- Electrochemical property -- Rate capability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2014.10.041
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Li4 Ti5 O12 –Li2 TiO3 –TiO2 and pristine Li4 Ti5 O12 electrodes have been synthesized by a solid-state method. The structure and electrochemical performance of these as prepared powders have been characterized by X-ray diffraction (XRD), Raman spectroscopy (RS), scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and the galvanostatic charge–discharge test. All samples have agglomerate structure with the primary particle size of about 1 µm. Electrochemical tests demonstrate that Li4 Ti5 O12 –Li2 TiO3 –TiO2 (LLT5) possesses high capacity and excellent rate capability. The improved electrochemical performance of Li4 Ti5 O12 –Li2 TiO3 –TiO2 (LLT5) is clearly related to the improved electronic conductivity and lithium ion diffusivity. The high cycling performance and wide discharge voltage range, as well as simple synthesis route and low synthesis cost of the Li4 Ti5 O12 –Li2 TiO3 –TiO2 (LLT5) is expected to show a potential commercial application.