Preparation and application of Ce-Cu based metal organic framework/biomass carbon composites in energy storage.

• A new 3-D bimetal organic framework (CeCu-MOF) was hydrothermally prepared. • The plant-charcoal obtained by hydrothermal method has the best electrochemical performance. • Different amounts of plant-charcoal was employed to form CeCu-MOF/C composites to improve the electrical conductivity. • For lithium-ion batteries, 10 wt% plant-charcoal performed best, while for supercapacitors, 20 wt% of plant-charcoal is best. [Display omitted] We prepared a novel three dimensional (3-D) 3d-4f MOF (named as CeCu-MOF; C 10 H 10 CeCu 2 N 4 O 12) which exhibits triclinic symmetry P-1 space group, and applied it to the study of electrode materials in organic system and aqueous solution system respectively. In order to overcome the shortcomings of poor electrical conductivity of MOF, we prepared several plant-charcoal materials with discarded grapefruit peel by different carbonization methods. The best electrochemical performance is selected for detailed study. In this paper, different amounts of plant-charcoal and MOF were used as electrode materials for supercapacitors and lithium-ion batteries, and their electrochemical properties were investigated. The results showed that the addition of plant-charcoal did help to improve the electrochemical performance compared with the single-phase MOF. [ABSTRACT FROM AUTHOR]