Foam metal matrix oxide electrode used in lithium-ion battery cathode and preparation method thereof

Abstract

The invention relates to a preparation method of a foam metal matrix oxide electrode used in the lithium-ion battery cathode, relating to a metal electrode used in the lithium-ion battery cathode and a preparation method thereof. The invention aims to solve the problems of the existing lithium-ion battery anode material that the specific capacity is low, the cycle performance is poor and the preparation method is complicated. The foam metal matrix oxide electrode uses one or two of foam metals comprising Cu, Ni and Fe as the matrix. The preparation method of the foam metal matrix oxide electrode comprises the following steps: 1) cleaning with acid solution; 2) soaking with alkaline solution; and 3) generating one or two of the corresponding transition metal oxides, namely CuO, Cu2O, NiO, Ni2O, Fe2O3 and Fe3O4 on the foam metal in situ through low-temperature roasting and other steps to obtain the foam metal / transition metal oxide composite electrode. The preparation method is simple, the electrode has high specific capacity, long cycle life and excellent rate performance; and the electrode is suitable for the lithium-ion battery system of an electric vehicle.

Description

technical field

[0001] The invention relates to a metal electrode used for a negative electrode of a lithium ion battery and a preparation method thereof. Background technique

[0002] Due to its high specific energy, excellent cycle performance and good safety, lithium-ion batteries have gradually become the best secondary battery system with comprehensive performance, and their applications have penetrated into many fields of civilian and military applications, including mobile phones, notebook computers , camcorder, digital camera, etc. And gradually get involved in the large-capacity lithium-ion battery market such as electric vehicles, aerospace and energy storage. Developing new high-capacity, long-life electrode materials and obtaining lithium-ion batteries with high specific energy and high safety are important technical fields that are urgently needed for research and development. As an important factor to improve battery energy density and cycle performance, elec...