Stable Bimetal-MOF Ultrathin Nanosheets for Pseudocapacitors with Enhanced Performance.
Hai-Meng MaJing-Wei YiShuang LiChong JiangJun-Hua WeiYa-Pan WuJun ZhaoDong-Sheng LiPublished in: Inorganic chemistry (2019)
Exploring high-performance metal-organic frameworks (MOFs) for pseudocapacitors is quite meaningful for energy storage. Herein a bimetal NiCo-MOF with ultrathin thickness was prepared via a simple hydrothermal method, which shows excellent electrochemical performance with specific capacitances of 1945.83 and 1700.40 F/g at current densities of 0.5 and 1 A/g, respectively, while maintaining good stability. X-ray photoelectron spectroscopy and X-ray absorption near-edge spectroscopy spectra unravel that the strong coupling between Ni and Co species enhances the valence state of Ni2+ in the ultrathin nanosheets, which facilitates the charge transfer during the electrochemical reaction and results in greatly improved pseudocapacitive reactivity. This work provides guidance on the promising prospect of MOF materials for pseudocapacitor applications.
Keyphrases
- metal organic framework
- high resolution
- gold nanoparticles
- single molecule
- electron transfer
- ionic liquid
- dual energy
- molecularly imprinted
- label free
- optical coherence tomography
- mass spectrometry
- magnetic resonance imaging
- reduced graphene oxide
- municipal solid waste
- highly efficient
- genetic diversity
- liquid chromatography
- anaerobic digestion