期刊
ENERGY STORAGE MATERIALS
卷 19, 期 -, 页码 424-431出版社
ELSEVIER
DOI: 10.1016/j.ensm.2019.03.010
关键词
Black phosphorus; Heterostructure; Graphene; Anode; Lithium ion battery
资金
- Science and Engineering Faculty (QUT)
- Australian Research Council (ARC) through ARC Future Fellowship [FT180100387, FT160100281]
- ARC Discovery Early Career Researcher Award (DECRA) project [DE150100280]
- ARC Discovery Project [DP160102627]
A novel 2D-TiO2-2D van der Waals (vdW) heterostructured (BPNs@TiO2@G) hydrogel is developed as a high-performance anode material for lithium ion batteries by coating black phosphorus nanosheets (BPNs) onto porous graphene/TiO2 composite hydrogel (TiO2@G). This unique 2D-TiO2-2D vdW heterostructure not only prevents close restack between 2D nanosheets, but also provides rapid interlayer transfer paths and enhanced interfacial storage, together with some inherited advantages from 2D BPNs and graphene, such as shortened diffusion pathways, improved conductivity, supressed volume changes and lithium dendrite growth over cycling. As a result, BPNs@TiO2@G anode delivers an attractive initial discharge capacity as high as 1336.1 mAh g(-1) (at 0.2 A g(-1)), a superior rate capability (271.1 mAh g(-1) at 5.0 A g(-1)), and a good cycling life (502 mAh g (-1) for 180 cycles) under a potential window close to 3.0 V. This study thus opens a new window for designing novel high-performance electrodes for electrochemical energy storage devices.
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