| As cobaltite spinels has a high initial capacity, excellent thermal stability and electrochemical properties, and lower cost, non-toxic, etc are expected to become a main force in lithium-ion battery anode materials. In this paper, octahedral and lamellar structure MnCo2O4 were synthesized by hydrothermal method, as well as Cobalt oxides and a variety of mesoporous ferrite particles. we analyzed the phase of the products by by X-ray diffraction(XRD).scanning electron microscopy (SEM), transmission electron microscopy(TEM) were used to characterize the morphology of the products. Electro chemical properties of the product were tested by cyclic voltammetry (CV), blue electric battery tester. Various characterizations analysis proves composite transition metal oxide with superior electrochemical performance as anode materials for lithium-ion batteries have great potential. The specific content of this paper are as follows:1、MnCo2O4 octahedral structure with edge lengths about 500 nm was successfully synthesized by a simple hydrothermal route. With the use of NaOH, the chemical potential and the rate of ionic motion in the precursor solution were controlled, and the particle size was limited. The magnetization measurements revealed that products exhibited ferrimagnetic characteristics with different saturation magnetization and coercivity at different measuring temperature. In addition, the as-prepared MnCo2O4 as anodes for Lithium-Ion Batteries exhibits a reversible capacity of 1180 mA h g-1 and 1090 mA h g-1 at a current density of 0.1 C and 1 C. The excellent cyclic performance is confirmed, because the value of reversible capacity for MnCo2O4 is 618 mA h g-1 after 50 cycles at 0.1C. Owing to its good rate performance, MnCo2O4 octahedral products were suggested to have a promising application as anode material for lithium ion batteries.2、In this paper, a simple hydrothermal method were used to synthesize lamellar MnCo2O4 hexahedral particle with particle size of about 10 μm. By setting a comparison experiment and analysing SEM image, we explored the influence of on the morphology. we obtained that the amount of urea and reaction temperature is an important factor affecting the morphology. This paper also taked electrochemical analysis of MnCo2O4 layered hexagonal structure. we can see from the charge-discharge curve, layered hexahedral MnCo2O4initialcapacityup1840 mA h g-1,after 50 cycles still retained the capacity of 710 mA h g-1.According to analysis of the electrical properties, hexahedral layered structure MnCo2O4 can be expected to become promising lithium-ion battery anode material.3、No template hydrothermal synthesis of MFe2O4 200-300nm in diameter (M= Co, Mn, and Ni) mesoporous ball,get large surface area 87.5m2/g and an average pore size of mesoporous 27.52nm CoFe2O4 have.When testing the negative electrode material for lithium-ion battery,the initial charge and discharge capacity of the mesoporous MnFe2O4 1030mAh/g,612.5mAh/g, good discharge performance, and remains in the 379mAh/g,a stable discharge capacity after 50 cycles. It showed that the active phase and the synergy between the different metal oxides on the electrochemical performance and stability of the composite electrode having a mesoporous structure is greatly improved. |
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