Copper current collector for lithium metal secondary battery, preparation method thereof and lithium metal secondary battery

A secondary battery, lithium metal technology, applied in the field of lithium metal secondary battery, copper current collector for lithium metal secondary battery, can solve problems such as unfavorable environmental safety, unfavorable large-scale production, complicated operation and the like
CN108649232AInactive Publication Date: 2018-10-12NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2018-10-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a copper current collector for a lithium metal secondary battery, comprising a copper foil and a polymer layer introduced on the surface of the copper foil, wherein the polymerlayer is a functional polymer with one or several groups of cyan, hydroxyl, amino, aldehyde group and carboxyl; inorganic nanoparticles are dispersed in the polymer layer; the inorganic nanoparticlesare one or several of alkylated alumina nanoparticles, nano silica, nano calcium carbonate, nano calcium phosphate, and iron oxide nanoparticles; and the inorganic nanoparticles have a mass fraction in the polymer layer of 0-5 percent. The invention introduces a functional polymer layer on the surface of the copper current collector, and the polymer layer may change the current density and stabilize the deposition of the metal lithium, thereby inhibiting the generation of lithium dendrites, stabilizing the SEI film, and improving the efficiency and safety of the lithium metal battery. The invention also provides a method for preparing a copper current collector for a lithium metal secondary battery and the lithium metal secondary battery.
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Description

technical field

[0001] The invention belongs to the technical field of lithium metal batteries, and in particular relates to a copper current collector for a lithium metal secondary battery, a preparation method thereof and a lithium metal secondary battery. Background technique

[0002] The non-renewability of fossil energy and the pollution to the environment make people devote themselves to seeking safe and reliable renewable energy. At present, lithium-ion batteries are the most widely used energy storage devices, which bring great convenience to our daily life. At the same time, the rapid development of mobile electronic devices and electric vehicles makes it urgent to improve the energy density of lithium secondary batteries. Although many methods for improving the energy density of lithium ion batteries have been reported, lithium ion batteries still cannot meet the fast Increased energy density requirements.

[0003] In the pursuit of higher energy density, metal l...

Claims

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