Ti3C2/CNTs Macroporous Conductive Network Boosts Li4Ti5O12-TiO2 Anode Performance for Practical Li Ion and Mg Ion Batteries

被引:11
作者
Zhang, Wenhan [1 ,2 ]
Li, Yong [1 ,3 ]
Lv, Taolin [1 ]
Liu, Wen [1 ]
Luo, Ying [1 ]
Guo, Rui [1 ]
Pei, Haijuan [1 ]
Lai, Chunyan [2 ]
Xie, Jingying [1 ]
机构
[1] Shanghai Inst Space Power Sources, State Key Lab Space Power Sources Technol, Shanghai 200245, Peoples R China
[2] Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai 200090, Peoples R China
[3] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China
基金
中国国家自然科学基金;
关键词
CNTs; Li-ion batteries; Mg-ion batteries; LITHIUM; MICROSPHERES; NANOCRYSTALS; NITROGEN;
D O I
10.1149/1945-7111/abe8b8
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Spinel lithium titanate (Li4Ti5O12) 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 (Ti(3)C(2)s) and used for the modification of Li4Ti5O12-TiO2. Owing to the excellent mechanical properties of CNTs and Ti(3)C(2)s, the prepared Ti(3)C(2)s-CNTs-Li4Ti5O12/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 Ti(3)C(2)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.
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页数:8
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