Metal-organic framework (MOF) as an active material is a state-of-the-art challenge to improve performance of energy storage devices due to its high porosity, ion diffusion channel and provision of redox sites. Nevertheless, the development of next-generation devices requires overcoming shortcomings such as low electrical conductivity and low MOF stability. Herein, the in situ growth of a nickel-based MOF on a Ni foam and the formation of a Ni-MOF@NiS2@C (NMSC) core-shell hetero-nanostructure is reported to overcome the challenge of using MOFs as active materials. Additionally, a surfactant-assisted approach is demonstrated to construct an ultra-thin 2D nano-accordion structure with interstitial gaps between the nanosheets. The unique nano-accordion structure facilitates faster ion diffusion and decreases the total resistance owing to the excellent charge transfer ability. In particular, the solid-state flexible supercapacitor exhibited a high performance with a specific capacitance of 283.5 F g−1 with an excellent energy density of 77.2 W h kg−1 at a power density of 7000 W kg−1.
|Journal||Chemical Engineering Journal|
|Publication status||Published - 2021 Feb 15|
Bibliographical noteFunding Information:
The authors Chang Soo Lee and Jeong Min Lim contributed equally to this study. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) ( 2018M3A7B4071535 , NRF-2019R1C1C1010283 and NRF-2019R1C1C1002305 ).
© 2020 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering