Preparation method of composite metal anode for secondary battery and product thereof

A composite metal, secondary battery technology, applied in electrode manufacturing, battery electrodes, electrode extrusion, etc., can solve the problems of adverse effects on metal electrode performance, difficulty in large-scale production, volume expansion, etc., to reduce volume expansion and raw materials. cost, the effect of reducing production energy consumption

Active Publication Date: 2016-06-01
张五星
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, further studies have also shown that polymer electrolytes are prone to volume expansion and even fall off during charging and discharging or soaking in the electrolyte; especially when polymer electrolytes are prepared by solut

Method used

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  • Preparation method of composite metal anode for secondary battery and product thereof
  • Preparation method of composite metal anode for secondary battery and product thereof
  • Preparation method of composite metal anode for secondary battery and product thereof

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preparation example Construction

[0044] Specifically, for the preparation process of the composite metal electrode for secondary batteries according to the present invention, the preparation method proposed by the present invention is as follows figure 1 shown, and specifically includes the following steps:

[0045] First, if figure 2 As shown, the surface of the film made of the current collector is cleaned, and then the photosensitive film is fully attached to its front and back sides; then, as Figure 3a and 3b As shown, for example, using a mask and undergoing exposure, development and curing treatments, a plurality of circular openings distributed in an array are formed on the photosensitive film, and the diameter of these circular openings is set to be 60 microns to 60 microns. 120 microns, and each exposes the current collector material located therebelow;

[0046] Next, see Figure 4a and 4b , on the surface of the exposed current collector material, continue to deposit the metal electrode mater...

Embodiment 1

[0051] Weigh the appropriate ratio of polyethylene oxide (PEO), LiPF 6 , Li 3 N nano-powders, and these three were added to THF solvent for dissolution and dispersion for 12 hours, and ultrasonic dispersion was performed with 100W ultrasonic power for 30 minutes in the middle; for high molecular polymers and alkali metal salts, the oxygen in the former The molar ratio between the element and the alkali metal in the latter was set at 10; the Li 3 The average particle size of the N nanometer powder is 100 nanometers, and it is set to account for 20% of the total weight percentage of the high molecular polymer and the alkali metal salt, thereby preparing the required composite electrolyte solution for use.

Embodiment 2

[0053] Weigh polyacrylonitrile, sodium hexafluorophosphorus, Al 2 o 3 Nano-powder, and these three were added to acetonitrile solvent for dissolution and dispersion for 12 hours, and ultrasonic dispersion was performed with 200W ultrasonic power for 15 minutes in the middle; for high molecular polymers and alkali metal salts, the oxygen element in the former The molar ratio with the alkali metal in the latter is set to 6; the Al 2 o 3 The average particle size of the nanometer powder is 200 nanometers, and it is set to account for 35% of the total weight percentage of the high molecular polymer and the alkali metal salt, thereby preparing the required composite electrolyte solution for use.

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Abstract

The invention belongs to the related field of secondary battery preparation technology, and discloses a preparation method of a composite metal anode for a secondary battery. The preparation method comprises the following steps: forming a plurality of hoes in an array type through a photosensitive film on a thin film made of a current collector; depositing a metal electrode material internally corresponding to each hole; continuously filling a composite electrolyte solution on the surface of the metal electrode material, and enabling the surface of the metal electrode to be covered with the composite electrolyte in a solid state finally, wherein the side face of the composite electrolyte is fixed by the photosensitive film. The invention also discloses a corresponding product prepared through the technology. Through the preparation method and the product, the metal anode for the secondary battery with a protective film and a fixing structure at the same time can be prepared in convenient operation and high efficiency manners, and negative reaction and dendritic crystal production of the metal anode and the electrolyte can be inhibited at the same time, so that the harmful effects such as volume expansion and low energy density caused by the protective film can also be obviously reduced, and the composite metal anode is particularly suitable for application occasions of industrial large-scale production.

Description

technical field [0001] The invention belongs to the related field of secondary battery preparation technology, and more specifically relates to a preparation method of a composite metal negative electrode for a secondary battery and a product thereof. Background technique [0002] Secondary batteries are an important medium for electric energy transfer, and have been widely used in portable electronic products, electric vehicles, energy storage and other fields. In secondary batteries, metal electrodes such as Li and Na have the advantages of high capacity and low electrode potential, so they are usually used as negative electrodes for secondary batteries such as Li-S batteries, lithium-ion batteries, sodium-ion batteries, and room temperature Na-S batteries. Material. However, in commercial applications, direct use of metal electrodes such as Li and Na as negative electrodes is regarded as one of the technical problems in this field. This is because metal electrodes such a...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/1395H01M4/134
CPCH01M4/0404H01M4/0411H01M4/134H01M4/1395Y02E60/10
Inventor 张五星薛丽红
Owner 张五星
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