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

A lithium-ion battery, foam metal technology, applied in battery electrodes, electrode carriers/current collectors, circuits, etc., can solve the problems of poor controllability of preparation methods, poor cycle performance, low specific capacity of negative electrode materials, etc., to ensure high current Discharge capacity, the effect of alleviating performance degradation, and ensuring cycle stability

Active Publication Date: 2011-04-13
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a foamed metal-based oxide electrode for lithium-ion batteries and its preparation method in order to solve the problems of low specific capacity, poor cycle performance and poor controllability of the preparation method of the existing lithium-ion battery negative electrode materials

Method used

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The foamed metal-based oxide electrode used for the negative electrode of lithium-ion battery in this embodiment is made of foamed metal as the matrix, and the corresponding transition metal oxide is generated in situ through oxidation reaction; the foamed metal is One of Cu, Ni, Fe or an alloy of any ratio of two of them; the metal foam undergoes an oxidation reaction in situ to generate the corresponding transition metal oxides as CuO, NiO, Fe 2 o 3 .

specific Embodiment approach 2

[0010] Specific embodiment 2: The metal foam-based oxide electrode used for the negative electrode of lithium-ion battery in this embodiment is made of metal foam as the matrix, and the corresponding transition metal oxide is generated in situ through oxidation-reduction reaction; the metal foam It is one of Cu, Ni, Fe or an alloy of any ratio of two of them; the metal foam generates the corresponding transition metal oxide in situ through oxidation-reduction reaction, which is Cu 2 O, Ni 2 O, Fe 3 o 4 ;

[0011] Embodiment 1 and Embodiment 2 use metal foam as the current collector and matrix skeleton of the electrode, and use metal foam as the current collector and matrix skeleton of the electrode. The volume change can alleviate the performance attenuation caused by the volume change of the electrode material and prolong the service life of the electrode; the transition metal oxide is used as the active material because the transition metal oxide is used as the active mat...

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the foam metal-based oxide electrode used for the negative electrode of lithium-ion battery is based on foam metal Cu, and undergoes an oxidation reaction in which the foam metal is generated in situ. The metal oxide is CuO; the transition metal oxide generated in situ by the foam metal after redox reaction is Cu 2 O. Others are the same as in the first or second embodiment.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/66H01M4/1391
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 左朋建尹鸽平马玉林尹成果
Owner HARBIN INST OF TECH
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