Nickel-decorated TiO2 nanotube arrays as a self-supporting cathode for lithium-sulfur batteries

被引:12
作者
Chen, Yuming [1 ]
Tang, Wenhao [1 ]
Ma, Jingru [1 ]
Ge, Ben [1 ]
Wang, Xiangliang [1 ]
Wang, Yufen [2 ]
Ren, Pengfei [1 ]
Liu, Ruiping [1 ]
机构
[1] China Univ Min & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Tianjin Normal Univ, Coll Phys & Mat Sci, Energy & Mat Engn Ctr, Tianjin 300387, Peoples R China
关键词
lithium-sulfur battery; TiO2; self-supporting; polysulfide intermediate; NANOWIRE ARRAYS; SHELL; COMPOSITE;
D O I
10.1007/s11706-020-0509-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Lithium-sulfur batteries are considered to be one of the strong competitors to replace lithium-ion batteries due to their large energy density. However, the dissolution of discharge intermediate products to the electrolyte, the volume change and poor electric conductivity of sulfur greatly limit their further commercialization. Herein, we proposed a self-supporting cathode of nickel-decorated TiO(2)nanotube arrays (TiO2NTs@Ni) prepared by an anodization and electrodeposition method. The TiO2NTs with large specific surface area provide abundant reaction space and fast transmission channels for ions and electrons. Moreover, the introduction of nickel can enhance the electric conductivity and the polysulfide adsorption ability of the cathode. As a result, the TiO2NTs@Ni-S electrode exhibits significant improvement in cycling and rate performance over TiO2NTs, and the discharge capacity of the cathode maintains 719 mA center dot h center dot g(-1)after 100 cycles at 0.1 C.
引用
收藏
页码:266 / 274
页数:9
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