In:
CrystEngComm, Royal Society of Chemistry (RSC), Vol. 25, No. 13 ( 2023), p. 1941-1950
Kurzfassung:
Metal–organic frameworks (MOFs) are regarded as self-sacrificial templates to prepare various transition metal-based electrode materials. However, there is still a lack of information on the electrochemical performance difference of MOF-derived hydroxides, oxides and phosphates in recent research. In addition, the rate capability is still a problem that hampers the application of MOF-based derivatives. Hence, it is necessary to choose suitable materials with outstanding electrical conductivity for MOF-based derivatives. In this study, a series of MOF-based derivatives, namely, Co-MOFs, NiCo-LDH (layered double hydroxide), NiCoO 2 , NiCoP, SAC@NiCo-LDH and SAC@NiCoP were prepared by combining suitable methods such as ion exchange, hydrothermal processes, oxidation and phosphorization. The electrochemical performance of these samples at 1 A g −1 was found in the order of SAC@NiCoP 〉 SAC@NiCo-LDH 〉 NiCoP 〉 NiCo-LDH 〉 NiCoO 2 . SAC@NiCoP exhibits the best specific capacitance and cycling stability when compared with the remaining materials. Phosphating enhances the electrical conductivity, the layer structure facilitates the intercalation/deintercalation of electrolyte ions, and oxidation inhibits the release of electrochemical performance. Hence, the enhancement effect is arranged as follows: phosphorization 〉 layer structure 〉 oxidation. This work analyzes the performance differences of MOF-based materials with different modification methods and crystal structures carefully and provides reliable criteria for the design and screening of advanced electrode materials.
Materialart:
Online-Ressource
ISSN:
1466-8033
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2023
ZDB Id:
2025075-7
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