Synthesis Of Morphology-controlled Micro-nano Materials And Their Electrochemical Properties As Electrode Materials

The properties of micro-nano materials dramatically differ from macroscale materials because of their uniquely tiny sizes.Besides,the effects between the performances and morphologies of materials are very strong.As a central component of energy transform devices,electrode materials depend much on their morphologies.Based on the above understanding,fuel cells are considered as the ideal keys to solve energy problems with their advatages of high energy transformation efficiency,low pollution,excellent portability and renewability.Supercapacitors,as original energy storage devices,have became the bridge between the battery and conventional capacitance,which weakens the shortages of the battery with low power density and the convenience capacitor with low energy density.The performance of electrode material depends much on their structures and morphologies,which is also the core component of supercapacitor.Based on aboven considerations,it is possible to prepare a series of micro-nano materials with unique structures and apply them into fuel cells and supercapacitors.The main research contens are summarized as below:1)PdCu bimetallic alloyed catalysts are prepared successfully by using AA as reducing agent through one-pot method.The test data indicate that the performance of Pd₆₅Cu₃₅5 is the best among a series of PdCu bimetallic alloyed catalysts with various ratios of Pd to Cu,whose electro-catalytic activity and durability are brilliant.The introduce of Cu cuts down much cost of the catalysts.2)Self-supported PdCu alloyed nanowires are synthesized by using DMF and EG simultaneously as reducing agent and solvent through one-pot method.The morphology can be modified by altering the dosages of Pd and Cu.It is indicated that Pd₄₃Cu₅₇sample possesses the best electro-catalytic activity.This work aims at enhancing the electro-catalytic performance as well as reducing the usage of Pd.Meanwhile,the morphologies of as-prepared catalysts are of strong dependency on the dosages of reactants.3)Oxide graphene?GO?coated onto MnPO₄·H₂O nanowires are abtained by onepot hydrothermal method.The specific capacitance of this composite material is as high as 287.9 F g^-1,compared with MnPO₄·H₂O uncoated GO.It is suggested that the introduction of carbon-based material strengthen the conductivity of the electrode material,which also enhances its abilities of capacitance and stability.It is also implied its proming future when it is applied into high power output devices.