3D lithium-philic porous metal current collector, negative electrode, and preparation and application thereof

A technology of porous current collectors and porous metals, applied in battery electrodes, lithium batteries, electrode carriers/current collectors, etc., can solve the problems of insufficient current density reduction and inability to effectively suppress lithium dendrites.
CN110828829AActive Publication Date: 2020-02-21CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2020-02-21

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Abstract

The invention belongs to the field of a lithium battery electrode material and particularly discloses a 3D lithium-philic porous metal current collector. The current collector comprises a 3D porous metal current collector and at least one of gold, silver and platinum compounded on a framework of the 3D porous metal current collector. The invention further discloses a preparation method and an application of the metal current collector. A 3D lithium-philic porous lithium ion negative electrode is particularly prepared. The current collector is advantaged in that at least one metal of gold, silver and platinum on the porous metal framework reduces the overpotential in the lithium metal nucleation and deposition process, uniform deposition and dissolution of lithium metal in the continuous cycle process are realized, growth of dendrites is effectively avoided, and the cycle life of a lithium metal battery is greatly prolonged.
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Description

technical field

[0001] The invention belongs to the field of energy storage devices, and in particular relates to a lithium-friendly 3D current collector and a negative electrode prepared by using the current collector. Background technique

[0002] Lithium-sulfur batteries are regarded as the most promising energy storage devices for the next generation due to their ultra-high energy density of 2600 Wh / kg. However, the growth of lithium dendrites and the huge volume effect limit its industrial application. To counter the risk of dendrites and mitigate volume effects. Currently, the most commonly used strategy is to support lithium metal in porous current collectors. For example, Shu-Hong Yu et al [L.L.Lu, J.Ge, J.N.Yang, S.M.Chen, H.B.Yao, F.Zhou, S.H.Yu, Free-standing coppernanowire network current collector for improving lithium anode performance, Nano Letters 16(2016 ) 4431-4437.] Prepared porous copper composed of copper nanofibers by self-assembly method, but when i...

Claims

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