A method for preparing an anode porous copper current collector used for a lithium metal battery

A lithium metal battery and porous copper technology, applied in battery electrodes, lithium batteries, electrode carriers/collectors, etc., can solve the problems of inconvenient operation and high preparation cost, achieve convenient operation, low cost, and improve comprehensive electrochemical performance Effect

Active Publication Date: 2017-10-24
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above methods can inhibit the growth of lithium dendr

Method used

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  • A method for preparing an anode porous copper current collector used for a lithium metal battery
  • A method for preparing an anode porous copper current collector used for a lithium metal battery
  • A method for preparing an anode porous copper current collector used for a lithium metal battery

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Embodiment 1

[0033] This embodiment provides a method for preparing a negative electrode porous copper current collector for a lithium metal battery, which at least includes the following steps:

[0034] In the first step, the surface of the Cu-Zn alloy sheet is cleaned with ethanol to remove impurities (such as esters) on the surface of the Cu-Zn alloy sheet. In the Cu-Zn alloy sheet, the atomic mass ratio of Cu is 60%;

[0035] Second step, preparation concentration is the hydrochloric acid solution of 0.5mol / L;

[0036] The third step is to use a three-electrode system on the electrochemical workstation, use platinum as the counter electrode, a saturated calomel electrode as the reference electrode, a Cu-Zn alloy sheet as the working electrode, and use the hydrochloric acid solution obtained in the second step as the electrolyte , using linear scan cyclic voltammetry from -1V to 0.5V cut-off voltage, scan 30 circles, the scan speed is 1mV / s, based on the quality of Cu-Zn alloy sheet, th...

Embodiment 2

[0039] This embodiment provides a method for preparing a negative electrode porous copper current collector for a lithium metal battery, which at least includes the following steps:

[0040] In the first step, the surface of the Cu-Mn alloy sheet is cleaned with methanol to remove impurities (such as esters) on the surface of the Cu-Mn alloy sheet. In the Cu-Mn alloy sheet, the atomic mass ratio of Cu is 70%;

[0041] The second step, preparation concentration is the sulfuric acid solution of 0.3mol / L;

[0042]The third step is to use a three-electrode system on the electrochemical workstation, using nickel as the counter electrode, saturated calomel electrode as the reference electrode, Cu-Mn alloy sheet as the working electrode, and the sulfuric acid solution obtained in the second step as the electrolyte , using linear sweep cyclic voltammetry from -1V to 0.7V cut-off voltage, scanning 40 circles, taking the quality of the Cu-Mn alloy sheet as the benchmark, and the precipi...

Embodiment 3

[0044] This embodiment provides a method for preparing a negative electrode porous copper current collector for a lithium metal battery, which at least includes the following steps:

[0045] In the first step, the surface of the Cu-Al alloy sheet is cleaned with acetone to remove impurities (such as esters) on the surface of the Cu-Al alloy sheet. In the Cu-Al alloy sheet, the atomic mass ratio of Cu is 50%;

[0046] Second step, preparation concentration is the hydrochloric acid solution of 0.7mol / L;

[0047] The third step is to use a three-electrode system on the electrochemical workstation, use platinum as the counter electrode, a saturated calomel electrode as the reference electrode, a Cu-Al alloy sheet as the working electrode, and use the hydrochloric acid solution obtained in the second step as the electrolyte , using linear sweep cyclic voltammetry from -1V to -0.2V cut-off voltage, scanning 20 circles, taking the quality of the Cu-Al alloy sheet as the benchmark, th...

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Abstract

The invention belongs to the technical field of lithium metal batteries, and particularly relates to a method for preparing an anode porous copper current collector used for a lithium metal battery. The method at least comprises a first step of cleaning the surface of a Cu-X alloy sheet with a solvent to remove impurities on the surface of the Cu-X alloy sheet; a second step of preparing an acid solution; and a third step of preparing the porous copper current collector by scanning different numbers of turns from -1 V to different cut-off voltages by adopting linear scanning cyclic voltammetry in an electrochemical workstation, with a three-electrode system being utilized, platinum or nickel being adopted as a counter electrode, a saturated calomel electrode being adopted as a reference electrode, the Cu-X alloy sheet being adopted as a working electrode, and the acid solution prepared in the second step being adopted as an electrolyte. Compared with the prior art, the porous copper current collector having different pore diameters are etched through an electrochemical process by utilizing the Cu-X alloy sheet as a substrate and adopting acids having different concentrations as media. The current collector is used as a lithium metal battery anode current collector, and has functions of providing deposition space for lithium metal and limiting growth of lithium dendrites.

Description

technical field [0001] The invention belongs to the technical field of lithium metal batteries, and in particular relates to a method for preparing a negative electrode porous copper current collector for lithium metal batteries. Background technique [0002] Lithium-ion battery is an important energy storage and conversion device. Compared with lead-acid batteries, it has higher energy density and power density, is more environmentally friendly, and has better cycle and rate performance. It is currently the most widely used secondary battery. secondary battery. Since the commercialization of lithium-ion batteries in the 1990s, the technological development of portable devices has promoted the rise of lithium-ion batteries. In recent years, the rigid demand for new energy vehicles has brought new growth points for the large-scale application of lithium-ion batteries. In the future, with the rise of the energy storage market, the application range of lithium-ion batteries wi...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/80H01M10/052H01M4/139
CPCH01M4/139H01M4/662H01M4/80H01M10/052Y02E60/10
Inventor 贺艳兵赵恒雷丹妮倪彬吕伟李宝华杨全红康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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