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A preparation method and application of a metal lithium negative electrode composite copper foil current collector loaded with layered bimetallic hydroxide

A hydroxide, composite copper foil technology, applied in the direction of electrode carrier/current collector, battery electrode, electrical components, etc., can solve the problem of metal lithium dendrites, etc., to improve the utilization rate, make raw materials cheap, good cycle stability Effects of sexual and safety performance

Active Publication Date: 2018-12-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of dendrites generated by metal lithium, the present invention provides a preparation method and application of metal lithium negative electrode composite copper foil current collector loaded with layered double metal hydroxide

Method used

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  • A preparation method and application of a metal lithium negative electrode composite copper foil current collector loaded with layered bimetallic hydroxide
  • A preparation method and application of a metal lithium negative electrode composite copper foil current collector loaded with layered bimetallic hydroxide
  • A preparation method and application of a metal lithium negative electrode composite copper foil current collector loaded with layered bimetallic hydroxide

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0026] In this embodiment, the preparation steps of NiFe-LDH powder are as follows:

[0027] (1) Weigh 0.1454g of nickel nitrate hexahydrate, 0.202g of ferric nitrate nonahydrate and 0.3g of urea, add 36mL of deionized water and ultrasonically dissolve at room temperature for 20 minutes.

[0028] (2) Transfer the ultrasonically dissolved solution to a 100mL polytetrafluoroethylene liner, then cover the liner with a stainless steel reactor shell, and react in an oven at 120°C for 12h.

[0029] (3) After the reactor was cooled to room temperature, the solution in the lining was washed and centrifuged with deionized water, and the obtained solid was dried in an oven at 60°C for 12 hours to obtain NiFe-LDH powder.

[0030] figure 1 The XRD pattern of the NiFe-LDH powder prepared for this example shows four crystal plane characteristic peaks, matching the typical characteristics of LDH materials.

Embodiment 2

[0032] In this embodiment, the preparation steps of NiFe-LDH powder are as follows:

[0033] (1) Weigh 0.1454g of nickel nitrate hexahydrate, 0.202g of ferric nitrate nonahydrate and 0.3g of urea, add 55mL of deionized water and ultrasonically dissolve at room temperature for 20 minutes.

[0034] (2) Transfer the ultrasonically dissolved solution to a 100mL polytetrafluoroethylene liner, then cover the liner with a stainless steel reactor shell, and react in an oven at 120°C for 12h.

[0035] (3) After the reactor was cooled to room temperature, the solution in the lining was washed with deionized water and centrifuged, and the obtained solid was dried in an oven at 60°C for 12 hours.

Embodiment 3

[0037] In this example, the preparation steps of the metal lithium negative electrode composite current collector loaded with layered double metal hydroxide are as follows:

[0038] (1) Weigh 0.0145g of nickel nitrate hexahydrate, 0.0202g of ferric nitrate nonahydrate and 0.03g of urea, add 55mL of deionized water and ultrasonically dissolve at room temperature for 20 minutes.

[0039] (2) Copper foil cut to a suitable size is packaged on a glass plate with high temperature resistant tape, only one side of the copper foil is exposed, and the exposed area is 10cm 2 , and then wipe with absolute ethanol.

[0040] (3) Transfer the ultrasonically dissolved solution to a 100mL polytetrafluoroethylene liner, put the encapsulated copper foil in it, and then cover the liner with a stainless steel reactor shell, and react in an oven at 120°C for 12h.

[0041] (4) After the reactor was cooled to room temperature, the copper foil was taken out and washed several times with deionized wat...

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Abstract

The invention discloses a method for preparing a metal lithium negative electrode composite copper foil current collector loaded with layered bimetallic hydroxide, which comprises the following steps:(1) weighing nickel nitrate hexahydrate, iron nitrate nonahydrate and urea, and adding deionized water for ultrasonic dissolution; (2) packaging the cut copper foil on a glass plate with adhesive tape, exposing only one side of the copper foil, and then wiping with absolute ethanol; (3) transferring the ultrasonic dissolved solution to the polytetrafluoroethylene liner, placing the copper foil into the liner, placing the liner into the stainless steel reaction kettle shell, and reacting in an oven; 4) take out that reaction kettle, cooling to room temperature, take out the copper foil, cleaning with deionized wat and absolute ethanol, and drying at room temperature. The NiFe powder prepared by the solvothermal method is characterized in that the NiFe powder prepared by the solvothermal method is characterized in that the NiFe powder prepared by the solvothermal method is characterized in that: LDH has good mechanical properties. The array structure formed on the surface of copper foilcan increase the specific surface area of the electrode, which is conducive to the contact between the electrode surface and the electrolyte and to obtain uniform lithium ion flux.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and relates to a method for preparing a metal lithium negative electrode composite copper foil current collector, in particular to a method for growing NiFe-LDH (layered double metal hydroxide) on the surface of the metal lithium negative electrode copper foil current collector A method and application for obtaining a composite current collector. Background technique [0002] With the increasing application requirements in the fields of electric vehicles and mobile electronic devices, the traditional lithium-ion battery with lithium-containing compounds as the positive electrode and graphite as the negative electrode is close to its theoretical capacity, and there is an urgent need to develop new high-energy-density energy storage systems. Meet the needs. Among all the known negative electrode materials of lithium secondary batteries, metal lithium negative electrode is 3860 mAh·g -1 T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/134H01M4/485H01M4/525H01M4/48
CPCH01M4/134H01M4/48H01M4/485H01M4/525H01M4/667Y02E60/10
Inventor 范立双郭志坤张乃庆孙克宁吴宪
Owner HARBIN INST OF TECH
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