Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Abstract

In this work, porous NiMn 2 O 4 nanosheets with large surface areas are successfully grown by a hydrothermal method and examined as electrodes for supe rcapac itors. Resu lts h ave sho wn th at the supercapacitor based on NiMn 2 O 4 electrodes exhibits the highest specific capacitance of 1321.6 F g −1 at a scan rate of 2 A g −1 , much higher than those of other supercapacitors made of metal oxides and composites. The NiMn 2 O 4 supercapacitor also shows a good cycling behavior, only 6.5 % capacitance decay after 1500 cycles. The NiMn 2 O 4 nanosheets possess a robust mechanical adhesion to Ni foam, which has been demonstrated by an ultrasonication test.

Designing Sandwiched and Crystallized NiMn2O4/C Arrays for Enhanced Sustainable Electrochemical Energy Storage

“…The capacitance decreases 36.4% when the currents increase from 1 to 30 A/g, which further indicates that the fabricated NiMn 2 O 4 /C//AC-ASC is more desirable for SCs. For the structural advantages to be confirmed further, the sandwiched NiMn 2 O 4 /C is also compared to the other NiMn 2 O 4 -based supercapacitors reported in previous literature ,− (as shown in Table S1). As observed, the sandwiched NiMn 2 O 4 /C exhibits superior performances among the other NiMn 2 O 4 -based materials.…”

Production of NiMn2O4 Hollow Spheres and CoFe2O4 Bowl-like Structures by Using Block Copolymer Stabilized Polystyrene Spheres as a Hard Template

“…2. The deposition of metal hydroxides on the surface using the controlled precipitation technique in the presence of urea and then the production of both CoFe 2 O 4 [9,[23][24][25][26] and NiMn 2 O 4 [27,28] structures by calcination process have been studied previously. The production of metal oxides was carried out very similar to these previous studies.…”

“…It is also important that the polymer to be selected for this purpose has to have high metal ion adsorption capacity, low cost and easy availability. [9,[23][24][25][26][27].…”

Production of Nimn2o4 Hollow Spheres and Cofe2o4 Bowl-Like Structures by Using Block Copolymer Stabilized Polystyrene Spheres as a Hard Template

“…2. The deposition of metal hydroxides on the surface using the controlled precipitation technique in the presence of urea and then the production of both CoFe 2 O 4 [9,[23][24][25][26] and NiMn 2 O 4 [27,28] structures by calcination process have been studied previously. The production of metal oxides was carried out very similar to these previous studies.…”