Hollow porous cuprous oxide-copper oxide-ferric oxide cubic lithium ion battery anode and one-step preparation method thereof

Abstract

The invention provides a hollow porous cuprous oxide-copper oxide-ferric oxide cubic lithium ion battery anode based on three-dimensional porous copper skeleton in-situ growth. The battery anode is composed of a three-dimensional porous copper skeleton and hollow porous cuprous oxide-copper oxide-ferric oxide cubes, the hollow porous cuprous oxide-copper oxide-ferric oxide cubes are cubes which are of a hollow porous structure and is formed by assembling cuprous oxide nanoparticles and copper oxide nanoparticles, wherein the cuprous oxide nanoparticles and the copper oxide nanoparticles are formed by partially oxidizing the surfaces of ferric oxide nanoparticles and the three-dimensional porous copper skeleton in situ. The hollow porous cuprous oxide-copper oxide-ferric oxide cubes are uniformly distributed on the surface of the three-dimensional porous copper skeleton. The invention also provides a one-step preparation method of the anode. The lithium ion battery anode provided by theinvention can effectively buffer the volume change of the lithium ion battery in the charge-discharge process, prevent the active component from falling off in the charge-discharge process of the lithium ion battery, and significantly improve the specific capacity and cycle performance of the lithium ion battery anode.

Description

technical field [0001] The invention belongs to the field of lithium ion battery negative electrodes, and relates to a hollow porous cuprous oxide-copper oxide-ferric oxide cubic lithium ion battery negative electrode and a one-step preparation method thereof. Background technique [0002] Due to the large-scale use of non-renewable resources such as oil, coal, and natural gas, it will not only cause environmental problems, but also face the problem of resource depletion. Therefore, in recent years, experts and scholars around the world have been committed to finding and developing green and renewable energy such as wind, solar, hydro, and tidal energy to promote green and environment-friendly economic development. These clean energy sources all require the effective support of energy storage and conversion devices to compensate for their intermittent nature. As a renewable energy storage device, lithium-ion batteries have been widely studied and applied due to their high e...

AI Technical Summary

Problems solved by technology

The method and the negative electrode prepared by the lithium ion battery have the following disadvantages: (1) the production process is cumbersome, which is not conducive to the reduction of production cost and the realization of large-scale production; 2 O cubes and carbon black are bonded on copper foil, and the binder itself is not conductive, which will hinder electron transport, increase electrode polarization and impedance, resulting in poor rate performance; (3) in the charging and discharging process of lithium-ion batteries In the process, the intercalation and extraction of lithium ions will cause huge volume changes. The structure of the negative electrode of lithium ion batteries prepared by this method does not have the ability to effectively buffer the huge volume changes generated during charge and discharge. The binding force between the components and between the active components and the copper foil is also relatively limited, and it is easy to cause the active components to fall off and fail during the huge volume change process of charging and discharging.

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