Preparation method of positive plate or negative plate for solid-state battery, positive plate or negative plate for solid-state battery and solid-state battery

A solid-state battery and negative electrode technology, which is used in battery electrodes, electrolyte battery manufacturing, non-aqueous electrolyte battery electrodes, etc., can solve the problem of high precision extrusion coating equipment, high slurry viscosity range requirements, and reduced production efficiency. question

Pending Publication Date: 2020-10-20
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Extrusion coating requires high equipment precision, high maintenance requirements, and high slurry viscosity range requirements. When changing specifications, new gaskets need to be replaced, which will reduce production efficiency

Method used

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  • Preparation method of positive plate or negative plate for solid-state battery, positive plate or negative plate for solid-state battery and solid-state battery
  • Preparation method of positive plate or negative plate for solid-state battery, positive plate or negative plate for solid-state battery and solid-state battery
  • Preparation method of positive plate or negative plate for solid-state battery, positive plate or negative plate for solid-state battery and solid-state battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of the negative electrode sheet for solid battery provided in this embodiment is as follows:

[0047] Step 1, the inorganic solid electrolyte material selects garnet type lithium ion inorganic solid electrolyte material namely Li 7 La 3 Zr 2 o 12 (Powder particle size 0.5 μm), polyvinylidene fluoride (Mw=1.1 million) is selected as the organic polymer electrolyte material, and N,N-dimethylformamide is selected as the organic solvent. Will Li 7 La 3 Zr 2 o 12 Add 20kg of powder and 1kg of polyvinylidene fluoride powder into 59kg of organic solvent N,N-dimethylformamide, stir for 2 hours, and mix evenly to obtain composite electrolyte coating slurry (solid content: 35wt%).

[0048] Step 2, apply slurry to the composite electrolyte obtained in step 1, and carry out pre-dispersion treatment for 30 minutes by stirring; Negative electrode sheet with composite electrolyte layer; spraying process: the ultrasonic frequency of atomization by ultraso...

Embodiment 2

[0051] The preparation method of the negative electrode sheet for solid batteries provided in this example is mainly the same as in Example 1, except that in the spraying process in step 2, the ultrasonic frequency of atomization by the ultrasonic atomization sprayer is 60 Hz.

Embodiment 3

[0053] The preparation method of the negative electrode sheet for solid batteries provided in this example is mainly the same as in Example 1, except that in the spraying process in step 2, the ultrasonic frequency of atomization by the ultrasonic atomization sprayer is 90 Hz.

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Abstract

The invention discloses a preparation method of a positive plate or a negative plate for a solid-state battery, a plate and the solid-state battery, and the preparation method comprises the followingsteps: putting inorganic solid-state electrolyte powder with lithium ion conductivity and an organic polymer electrolyte material into an organic solvent, and uniformly mixing the inorganic solid-state electrolyte powder and the organic polymer electrolyte material; carrying out pre-dispersion on the obtained composite electrolyte coating slurry; uniformly spraying the pre-dispersed composite electrolyte coating slurry onto a positive plate or a negative plate by adopting an ultrasonic atomization spraying machine; and drying the pole piece sprayed with the composite electrolyte coating slurryto obtain the positive plate or negative plate coated with a composite electrolyte layer. By the adoption of the method, excessive spraying can be avoided, accurate liquid drop distribution is achieved, an accurate micron-thickness coating is formed, and the coating is thin, uniform and controllable; waste and air pollution caused by reverse spraying can be reduced, and the cost is saved; the energy consumption is low, the atomization efficiency is high, the limitation on atomized liquid is small, the slurry utilization rate is up to 90% or above, and the production efficiency can be greatlyimproved.

Description

technical field [0001] The invention relates to the technical field of solid-state battery preparation, more specifically, it relates to a method for preparing a positive electrode sheet or a negative electrode sheet for a solid-state battery, a positive electrode sheet or a negative electrode sheet for a solid-state battery, and a solid-state battery. Background technique [0002] At present, the traditional slurry coating process of lithium-ion batteries mainly adopts two types: roll coating transfer coating and extrusion coating. Roller transfer coating uses the rotation of the coating roller to drive the slurry, adjusts the amount of slurry transfer by adjusting the gap between the scrapers, and transfers the slurry to the substrate by the rotation of the back roller or coating roller, and controls the coating layer according to the process requirements thickness to meet load requirements. Roller transfer coating has poor coating accuracy and cannot guarantee the consis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/13H01M4/139H01M10/0525H01M10/056
CPCH01M4/13H01M4/139H01M10/0525H01M10/056H01M10/058Y02E60/10Y02P70/50
Inventor 许晓雄林久杨杰
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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