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Three-dimensional orderly porous copper current collector preparation method

A three-dimensional ordered, porous copper technology, applied in the direction of electrode carrier/collector, non-aqueous electrolyte battery, lithium battery, etc., can solve the problems of unbalanced performance and cost, high preparation cost, poor effect, etc., to reduce local The effect of current density, large specific surface area, and easy preparation

Active Publication Date: 2019-05-28
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem that the negative electrode material of the existing lithium metal battery has poor lithium ion deposition effect, and if a good lithium ion deposition effect is to be produced, the preparation cost of the negative electrode material is too high, that is, the performance and cost cannot be balanced, and the cost performance is low. Provided is a method for preparing a three-dimensional ordered porous copper current collector

Method used

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  • Three-dimensional orderly porous copper current collector preparation method
  • Three-dimensional orderly porous copper current collector preparation method
  • Three-dimensional orderly porous copper current collector preparation method

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Embodiment 1～5

[0040] A method for preparing a three-dimensional ordered porous copper current collector, the method comprising:

[0041] 1) placing the wood powder in the pretreated copper-containing waste liquid, ultrasonically vibrating or stirring under constant temperature heating conditions, and filtering and separating to obtain filter residue and filtrate;

[0042] 2) acid-treating the pretreated flaky kenaf stalks, dispersing the separated filter residue in absolute ethanol to make a suspension, placing the acid-treated flaky kenaf stalks horizontally and dipping them in the suspension The filter residue is adsorbed in the middle, the suspension is impregnated with one-third of the thickness of the paper kenaf stalk, and a layered sheet-shaped template is obtained after the impregnation;

[0043] 3) adding hydrazine sulfate or formaldehyde to the separated filtrate, and rotary evaporation to obtain a concentrated solution;

[0044] 4) Lay the side of the sheet-shaped template on wh...

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Abstract

The invention relates to the field of lithium ion negative electrode materials, in particular to a three-dimensional orderly porous copper current collector preparation method. The method includes thesteps that (1) copper-containing waste liquid is adsorbed and trapped through wood powder, and filtering separation is performed to obtain filter slag and filtered liquid; (2) a kenaf stem is subjected to acid treatment, a suspension liquid is prepared through the filtered slag, the kenaf stem is horizontally placed and impregnated in the suspension liquid to adsorb the filtered slag, and a layered thin-sheet-shaped template is obtained; (3) an additive is added into the filtered liquid which is obtained through separation, and rotary evaporation is performed to obtain concentrated liquid; (4) the thin-sheet-shaped template and a copper substrate are attached and put in alkaline liquid for low-pressure impregnation, then an obtained product is taken out after impregnation is finished andthen impregnated in the concentrated liquid, repeated operation is performed for several times, and a precursor is obtained; and (5) the precursor is calcinated in special atmosphere, and a three-dimensional orderly porous copper current collector is obtained after calcinated operation is finished. The graded porous template is obtained through kenaf stem powder and the wood powder, the larger space is provided, the local electric current density is reduced, and continuous accumulation of lithium dendrites during growth is inhibited.

Description

technical field [0001] The invention relates to the field of negative electrode materials for lithium metal batteries, in particular to a method for preparing a three-dimensional ordered porous copper current collector. Background technique [0002] Lithium batteries are the primary power source for consumer electronics and are also being actively developed for electric vehicles and grid-scale energy storage. However, due to the limitation of electrode materials, the current commercial lithium-ion batteries have been difficult to meet the increasingly high performance requirements of the current energy storage market. [0003] Lithium metal batteries have received great attention due to their higher specific capacity (3860mAh g-1) and lower redox potential (-3.04V vs standard hydrogen electrode) than Li-ion batteries. Although the research started half a century ago, the growth and accumulation of lithium dendrites still exist during the cycling process of lithium metal bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F3/11H01M4/80H01M10/052
CPCY02E60/10
Inventor 唐谊平沈康侯广亚郑国渠
Owner ZHEJIANG UNIV OF TECH
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