Preparation method of seamlessly integrated metal substrate/nanoporous metal/metal oxide composite electrode material, and application of compound electrode material

Abstract

The invention discloses a preparation method of a seamlessly integrated metal substrate / nanoporous metal / metal oxide composite electrode material, and an application of the compound electrode material. The preparation method of the seamlessly integrated metal substrate / nanoporous metal / metal oxide composite electrode material comprises the following steps: 1, sequentially fully cleaning a metal substrate in an acidic solution, deionized water and ethanol, and carrying out vacuum drying; 2, depositing an alloy film on the metal substrate through using a magnetron sputtering process to obtain a structure A; 3, dealloying the structure in a corrosive solution to obtain a seamlessly integrated metal substrate / nanoporous metal structure; 4, rinsing with deionized water to remove the acid residual in the seamlessly integrated metal substrate / nanoporous metal structure, and carrying out vacuum drying to obtain a structure B; and 5, reacting the structure B in the reaction environment, and carrying out vacuum drying to obtain a seamlessly integrated metal substrate / nanoporous metal / metal oxide composite electrode. The composite electrode can be applied as an energy storage device electrode material.

Description

technical field [0001] The invention relates to a preparation method and application of a seamlessly integrated metal substrate / nano porous metal / metal oxide structure. Background technique [0002] High-energy, high-power-density storage / release technologies have important applications in fields such as hybrid electric vehicles, portable electronic devices, and renewable energy. Therefore, it is very important to study energy storage devices that can store / release high energy at high rates. Electrochemical energy storage involves both faradaic and non-faradaic mechanisms. Among them, capacitive charge storage stores energy through surface non-Faradaic ion adsorption and surface faradaic redox reaction, while in lithium-ion batteries, energy is stored through faradaic lithium ion insertion / extraction in electrochemically active materials. Traditional Li-ion battery electrodes composed of micron-sized powders have high energy storage, but they exhibit low rate characteristi...

AI Technical Summary

Problems solved by technology

At present, people have made preliminary explorations to improve the rate characteristics of metal oxides by developing low-dimensional nanomaterials and composite electrodes. However, due to the introduction of binders in traditional methods, electron conduction and ion diffusion in electrodes are severely hindered, thereby reducing rate characteristics of the battery

On the other hand, due to the pulverization, aggregation or even shedding of nanoparticle electrode materials during the lithium ion insertion / extraction process, it leads to low power, rapid capacity reduction and even electrode failure.

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