Preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery anode material

Abstract

A method for preparing an ordered mesoporous metal oxide@carbon lithium-ion battery negative electrode material belongs to the field of preparation of lithium-ion battery negative electrode materials. The present invention will solve existing SnO 2 The cycle stability and rate performance of base anode materials are poor. The method of the present invention: 1. using ferric oleate as a raw material, through temperature-programmed treatment, to obtain monodispersed oleic acid-coated iron ferric oxide nanoparticles; 2. then dissolving in an organic solvent, and standing at room temperature after ultrasound Obtain self-assembled NPs; 3. Dissolve the tin source in ethanol, slowly drop into the assembled NPs, and mechanically stir; 4. Wash with alcohol, dry, calcinate in an inert atmosphere, grind, etch, wash with water, and dry . SnO of the present invention 2 The @C anode material exhibits good cycle stability and rate performance; it can reach 730mAh g at 0.2C for 180 cycles –1 The capacity; when it returns to 0.2C after a large current cycle, the capacity still has no attenuation.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery negative electrode materials; in particular, it relates to a preparation method of an ordered mesoporous metal oxide@carbon lithium-ion battery negative electrode material. Background technique [0002] Lithium-ion batteries have been widely used in consumer electronics, such as laptop computers and electric vehicles, due to their high energy density, environmental friendliness, and low self-discharge rate. [0003] Electrode materials are the key factors restricting the performance of lithium-ion batteries, and negative electrode materials are an important part of lithium-ion batteries. The current commercial anode materials are mainly graphite materials. Due to the low specific capacity and unstable structure of graphite materials, it is easy to cause co-intercalation of solvents, resulting in a sharp decline in performance. Metal oxides have become a research hotspot due to t...

AI Technical Summary

Problems solved by technology

However, at present, most of the reported carbon-coated hollow structure metal oxides usually involve difficult control of carbon coating, and the size of the hollow structure pores is too large, which will greatly increase the cost and cause waste of battery volume, which violates the lithium The demand for the development of ion batteries in the direction of small size

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