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Three-dimensional porous copper oxide modified copper foil for lithium metal battery current collector as well as preparation method and application thereof

A lithium metal battery, three-dimensional porous technology, applied in the direction of lithium batteries, battery electrodes, electrode carriers/current collectors, etc., can solve the problems of difficult raw material acquisition, complicated preparation methods, high cost, etc. Simple, Inexpensive Effects

Inactive Publication Date: 2020-08-28
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a three-dimensional porous copper oxide modified copper foil and its Preparation method and application

Method used

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  • Three-dimensional porous copper oxide modified copper foil for lithium metal battery current collector as well as preparation method and application thereof
  • Three-dimensional porous copper oxide modified copper foil for lithium metal battery current collector as well as preparation method and application thereof
  • Three-dimensional porous copper oxide modified copper foil for lithium metal battery current collector as well as preparation method and application thereof

Examples

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Embodiment 1

[0031] A method for preparing a three-dimensional porous copper oxide modified copper foil for lithium metal battery current collectors, the process is as follows figure 1 shown, including the following steps:

[0032] S1. Prepare a clean commercial copper foil substrate: the copper foil used is a commercially available double-sided smooth copper foil, observed under SEM, the results are as follows figure 2 shown. The commercial battery-grade copper foil with double-sided optical thickness of 9 microns is pickled and degreased with 2.5mol / L hydrochloric acid solution for 150s. After pickling, the residual acid solution is cleaned with deionized water and absolute ethanol. Dry in the environment, the drying time is 20min, and set aside;

[0033] S2, preparation of etching solution: sodium hydroxide powder is dissolved in deionized water to obtain a clear alkali solution, and ammonium thiosulfate is added in the alkali solution in proportion, the concentration of sodium hydro...

Embodiment 2

[0042] A method for preparing a three-dimensional porous copper oxide modified copper foil for a current collector of a lithium metal battery, comprising the steps of:

[0043] S1. Prepare a clean commercial copper foil substrate: pickle and degrease the commercial battery-grade copper foil with a double-sided optical thickness of 9 microns with 3mol / L hydrochloric acid solution for 180s, then use deionized water and absolute ethanol after pickling Wash off the residual acid, dry at room temperature for 20 minutes, and set aside;

[0044] S2, preparation of etching solution: sodium hydroxide powder is dissolved in deionized water to obtain a clear alkali solution, and ammonium thiosulfate is added in the alkali solution in proportion, the concentration of sodium hydroxide solution is 4mol / L, and the concentration of ammonium thiosulfate solution is 0.8mol / L, the ratio is 35:1, standby;

[0045] S3. Etching treatment: use the etching solution prepared in step S2 to chemically et...

Embodiment 3

[0048] A method for preparing a three-dimensional porous copper oxide modified copper foil for a current collector of a lithium metal battery, comprising the steps of:

[0049] S1. Prepare a clean commercial copper foil substrate: pickle and degrease the commercial battery-grade copper foil with a double-sided optical thickness of 9 microns with 2mol / L hydrochloric acid solution for 120s, and use deionized water and absolute ethanol after pickling Wash off the residual acid, dry at room temperature for 20 minutes, and set aside;

[0050] S2, preparation of etching solution: sodium hydroxide powder is dissolved in deionized water to obtain a clear alkali solution, and ammonium thiosulfate is added in the alkali solution in proportion, the concentration of sodium hydroxide solution is 2mol / L, and the concentration of ammonium thiosulfate solution is It is 0.2mol / L, the ratio is 25:1, standby;

[0051] S3. Etching treatment: use the etching solution prepared in step S2 to chemic...

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Abstract

The invention discloses a three-dimensional porous copper oxide modified copper foil for a lithium metal battery current collector as well as a preparation method and application thereof, and belongsto the technical field of batteries. The preparation method of the three-dimensional porous copper oxide modified copper foil comprises the steps of mixing sodium hydroxide and an ammonium thiosulfatesolution in proportion to obtain an etching solution, then immersing a clean copper foil in the etching solution for a reaction to obtain a copper oxide nanowire modified copper foil, cleaning the copper oxide nanowire modified copper foil with deionized water and absolute ethyl alcohol and then drying in vacuum to obtain the final modified copper foil (Figure 4). The copper foil obtained by theinvention can be used as a lithium metal battery negative electrode current collector, and the copper oxide nanowire on the surface layer has good electrolyte wettability and good coating performance,and can be used for electrochemical lithium storage, guiding uniform deposition of lithium metal and inhibiting growth of lithium dendrites; and a compact solid electrolyte interphase (SEI) film containing lithium oxide is formed in the charge-discharge cycle, the mechanical strength is good, and the side reaction of metal lithium and electrolyte can be inhibited, so that the Coulombic efficiencyand the safety of the battery are improved, and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the field of lithium metal batteries, and in particular relates to a three-dimensional porous copper oxide modified copper foil used for a current collector of a lithium metal battery and a preparation method and application thereof. Background technique [0002] With the advent of the 3C era, people have higher and higher requirements for the specific energy of the battery. The theoretical capacity of the currently used commercial graphite anode is low, and it is difficult to increase it significantly. Therefore, the development of the next generation of lithium battery system is bound to be must do. Lithium metal is considered as an ideal high-energy-density anode material due to its extremely high theoretical specific capacity (3860mAh / g) and extremely low electrode potential (-3.04V vs standard hydrogen electrode (SHE)). In addition, it is also Li-O 2 And an important part of Li-S battery. [0003] Compared with graphite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/70H01M4/74H01M10/052
CPCH01M4/70H01M4/742H01M4/66H01M10/052Y02E60/10
Inventor 程方益邱晓光刘芳名刘九鼎严振华李海霞陈军
Owner NANKAI UNIV
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