Preparation method of improved room temperature electron ion fast transfer electrode slice for solid-state secondary lithium battery

A secondary lithium battery, fast transmission technology, applied in the direction of battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems that are not conducive to reducing the transmission time of lithium ions, low lithium ion conductivity, long average migration path, etc. Achieve the effects of improving energy density and rate performance, increasing transmission rate, and reducing interface impedance

Inactive Publication Date: 2016-09-07
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
View PDF9 Cites 63 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer electrolyte is easy to form a porous structure after being added to the electrode sheet, resulting in a longer and more tortuous average migration path of lithium ions in the electrode sheet, which is not conducive to reducing the transmission time of lithium ions in the electrode sheet, and compared to inorganic Solid electrolyte materials, polymer electrolytes have low room temperature lithium ion conductivity
After the electrode sheet is treated with sulfide sublim

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of improved room temperature electron ion fast transfer electrode slice for solid-state secondary lithium battery
  • Preparation method of improved room temperature electron ion fast transfer electrode slice for solid-state secondary lithium battery
  • Preparation method of improved room temperature electron ion fast transfer electrode slice for solid-state secondary lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 8 g LiCoO 2 , 0.5 g acetylene black and 0.5 g Li 1.3 al 0.3 Ti 1.7 (PO 4 ) 3 Grind for 1 h, then add 1.0 g of polyvinylidene fluoride binder (polyvinylidene fluoride is dissolved in N-methylpyrrolidone, the mass fraction is 15%) and continue grinding for 0.5-1 h to obtain a uniform slurry; The method is to apply the slurry on the surface of aluminum foil, and then place it in a 60 °C oven to dry for 6 hours; roll the dried pole pieces, cut them, weigh them, and then place them in a 120 °C vacuum oven for 12 hours. , transferred to a nitrogen-filled glove box to obtain LiCoO 2 Positive sheet.

Embodiment 2

[0037] 8 gLiFePO 4 , 0.2 g acetylene black and 0.8 g LiZr 2 (PO 4 ) 3 Grind for 1 h, then add 1.0 g of sodium alginate-poly-3,4-propylenedioxythiophene-2,5-dicarboxylic acid (SA-PProDOT for short) binder (SA-ProDOT dissolved in N-methylpyrrolidone , with a mass fraction of 40%) continued to grind for 0.5-1 h to obtain a uniform slurry; the slurry was coated on the surface of aluminum foil by scraping, and then dried in an oven at 60 °C for 6 h; the dried The pole pieces were rolled, cut and weighed, then dried in a vacuum oven at 120 °C for 12 h, and transferred to a nitrogen-filled glove box to obtain LiFePO 4 Positive sheet.

Embodiment 3

[0039] 9 g graphite, 0.1 g superconducting carbon black and 0.4 g Li 7 La 3 Zr 2 o 12 Grind for 1 h, then add 0.5 g of polytetrafluoroethylene binder (an emulsion composed of 98% polytetrafluoroethylene and 2% carboxymethyl cellulose, the mass fraction is 60%) and continue grinding for 0.5-1 h to obtain a uniform the slurry; the slurry was coated on the surface of the aluminum foil by scraping, and then dried in an oven at 60 °C for 6 h; the dried pole piece was rolled, cut, weighed, and then placed at 120 °C in a vacuum oven for 12 h, then transferred to a nitrogen-filled glove box to obtain a graphite negative electrode sheet.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of an improved room temperature electron ion fast transfer electrode slicefor a solid-state secondary lithium battery. The method comprises the following steps: (1) evenly mixing an active material, a conductive agent and a fast ion conductor according to a certain proportion; (2) adding a certain amount of a binder into the mixture, and mixing uniformly to obtain a uniform slurry; and (3) preparing the slurry into slices, and drying to obtain the required electrode slice. The preparation method of the electrode slice preparation uses the fast ion conductor material with high temperature high lithium ion conductivity; the material can play the role of increasing the contact area between the active particles and solid electrolyte, and he form a three-dimensional electron and lithium ion transport network, so as to ensure the rapid conduction of the electrons in the electrode also improve the transmission rate of lithium ions between the active particles and electrolyte. Therefore, the preparation method is beneficial to reducing the interface impedance among the active particles in the electrode slice and between the active particles and the solid electrolyte, thereby increasing the power rate performance of the solid-state secondary lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery preparation, in particular to an all-solid secondary lithium battery. Background technique [0002] With the gradual breakthrough of key technologies of lithium-ion batteries, the application fields of lithium-ion batteries have developed from portable electronic products to electric vehicles and energy storage grids. At the same time, people are paying more attention to the safety of lithium-ion batteries. because [0003] Therefore, while improving the energy density and power density of lithium-ion batteries, the safety issue has become a key issue that needs to be solved urgently. [0004] one of the questions. [0005] At present, commercial lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, separators, and electrolytes. Among them, the electrolyte can be divided into two types according to the different forms of existence: liquid electrolyt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/139H01M4/62H01M10/052
CPCH01M4/139H01M4/62H01M4/624H01M10/052Y02E60/10
Inventor 崔光磊马君刘海胜刘兆林张欣欣
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap