期刊
APPLIED SURFACE SCIENCE
卷 605, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.154653
关键词
Na ion batteries; K ion batteries; Heterogenous composite; TiSe2/TiO2/C; MXene derivatives
类别
资金
- National Natural Science Foundation of China [21905058]
- Basic and Applied Research Foundation of Guangzhou [202201010269]
- Guangdong University of Tech-nology Youth Hundred Talents Program [220413671]
A novel MXene derivative consisting of TiSe2/TiO2/C heterostructured hexagonal prism was prepared by a simple solid phase sintering method, showing excellent performance as an anode material for Na/K ion batteries with good cycling and rate capabilities. This work provides a simple approach to design metal oxide/selenide heterostructures toward Na/K ion batteries with superior performance and promotes the application of MXene derivatives in energy storage.
Establishing heterostructure is an effective strategy to improve the cycling and rate properties of electrode due to high charge transfer kinetics. Nevertheless, it is still a great challenge to prepare a reasonable heterojunction material with appropriate electrochemical property as anode for Na/K ion batteries. In this work, a novel MXene derivative consisted of TiSe2/TiO2/C heterostructured hexagonal prism has been prepared by a simple solid phase sintering method to converting Ti3C2Tx MXene to TiSe2/TiO2/C. In this composite, TiSe2 and TiO2 with different work functions can induce a built-in electric field in the heterojunction interface, accelerating the electrochemical courses. Serving as an anode material for Na ion batteries, TiSe2/TiO2/C can keep a discharge capacity of 280 mAh g(-1) at 5 A g(-1) after 1000 cycles and a superior rate capability with 212 mAh g(-1) even at 10 A g(-1). Even using as anode for K ion batteries, TiSe2/TiO2/C can still retain a capacity of 121 mAh g(-1 )at 0.1 A g(-1) after 800 cycles. This work supplies a simple approach to design metal oxide/selenide heterostructures to-ward Na/K ion batteries with excellent performance and promotes the application of MXene derivatives in the field of energy storage.
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