Ti3C2/CNTs Macroporous Conductive Network Boosts Li4Ti5O12-TiO2 Anode Performance for Practical Li Ion and Mg Ion Batteries. Issue 3 (2nd March 2021)

• Record Type: Journal Article
• Authors: Zhang, Wenhan; Li, Yong; Lv, Taolin; Liu, Wen; Luo, Ying; Guo, Rui; Pei, Haijuan; Lai, Chunyan; Xie, Jingying
• Is Part Of: Journal of the Electrochemical Society. Volume 168:Issue 3(2021)
• Publication Date: 2021-03-02
• Subjects: Ti3C2 -- CNTs -- Li4Ti5O12-TiO2 -- Li-ion batteries -- Mg-ion batteries; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/abe8b8
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Spinel lithium titanate (Li4 Ti5 O12 ) has been widely used as anode electrode for long-life lithium ion batteries (LIBs), however, it suffers from inherent poor electronic and ionic conductivity which limits its further development. Here, a composite macroporous conductive network is constructed by carbon nanotubes (CNTs) and few-layer titanium carbide (Ti3 C2 s) and used for the modification of Li4 Ti5 O12 -TiO2 . Owing to the excellent mechanical properties of CNTs and Ti3 C2 s, the prepared Ti3 C2 s-CNTs-Li4 Ti5 O12 /TiO2 (T-C-L) material can be directly used as binder-free electrode. Specifically, CNTs serve as a connection skeleton to stabilize the electrode structure and provide a conductive network to improve electron transport capabilities; the addition of Ti3 C2 s is beneficial to the formation of macropores which can further improve ion diffusion; the existence of TiO2 phase can improve its capacity as well as rate capability. Reasonable design and the synergistic effect of each component endow T-C-L outstanding Li-storage performance and Mg-storage performance. When combined with lithium belt to form a pouch battery, the T-C-L also exhibits satisfactory bending performance, which further expand its practicality. These results show great promise of the prepared T-C-L for LIBs and magnesium ion batteries (MIBs) and provide a modification method for other electrode materials that suffer from poor ion/electron diffusion capabilities.