Nano-Micro Letters

Ultrathin 2D Metal Organic Framework Nanosheets In-situ Interpenetrated by Functional Carbon Nanotubes for Hybrid Energy Storage Device

Feitian Ran1, Xueqing Xu1, Duo Pan2, Yuyan Liu1, Yongping Bai1, Lu Shao1, *

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Nano-Micro Lett. (2020) 12: 46

First Online: 04 February 2020 (Article)

DOI:10.1007/s40820-020-0382-x

*Corresponding author. E-mail: shaolu@hit.edu.cn (Lu Shao)

 

Abstract

 


Toc

The controllable construction of two-dimensional (2D) metal organic framework (MOF) nanosheets with favorable electrochemical performances is greatly challenging for energy storage. Here, we design an in-situ induced growth strategy to construct the ultrathin carboxylated carbon nanotubes (C-CNTs) interpenetrated nickel MOF (Ni-MOF/C-CNTs) nanosheets. The deliberate thickness and specific surface area of novel 2D hybrid nanosheets can be effectively tuned via finely controlling C-CNTs involvement. Due to the unique microstructure, the integrated 2D hybrid nanosheets are endowed with plentiful electroactive sites to promote the electrochemical performances greatly. The prepared Ni-MOF/C-CNTs nanosheets exhibit superior specific capacity of 680 C g-1 at 1 A g-1 and good capacity retention. The assembled hybrid device demonstrated the maximum energy density of 44.4 Wh kg−1 at a power density of 440 W kg−1. Our novel strategy to construct ultrathin 2D MOF with unique properties can be extended to synthesize various MOF-based functional materials for diverse applications.


 

Keywords

Metal-organic frameworks; Carbon nanotubes; Ultrathin 2D nanosheets; Hybrid supercapacitor

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