Thin film type sodium ion secondary battery and preparation method thereof

A technology of secondary batteries and sodium ions, which is applied in the direction of secondary batteries, electrolyte battery manufacturing, battery electrodes, etc., to achieve the effects of improving safety performance, avoiding shedding, and improving yield

Active Publication Date: 2021-12-03
DONGGUAN LILONG BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Sodium-ion battery thin-film battery has not yet been reported, so it is necessary to design a thin-film type sodium-ion secondary battery and its preparation method

Method used

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  • Thin film type sodium ion secondary battery and preparation method thereof
  • Thin film type sodium ion secondary battery and preparation method thereof
  • Thin film type sodium ion secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a thin-film sodium ion secondary battery, comprising step 1, selecting raw materials; step 2, spraying and sputtering; step 3, drying and rolling; step 4, stirring; step 5, packaging and molding;

[0029] In the above step 1, a certain amount of active material, conductive agent, binder, NMP solvent, current collector, sodium salt, mixed solvent, PEO polymer and PVDF are first selected for use, and the active material is carbon-coated sodium Fast ion conductor material sodium vanadium phosphate, the conductive agent is one or more mixtures of superconducting carbon black, carbon nanotubes and acetylene black, and the binder is one or more of PVDF, PTFE, polyaniline and polyurethane A variety of mixtures, and the current collector is an aluminum foil current collector or a nickel foil current collector;

[0030] Wherein the above-mentioned step two, take by weight 80% of the active material, 10% of the conductive agent and 10% of the binding agent ...

Embodiment 2

[0035] A method for preparing a thin-film sodium ion secondary battery, comprising step 1, selecting raw materials; step 2, spraying and sputtering; step 3, drying and rolling; step 4, stirring; step 5, packaging and molding;

[0036] In the above step 1, a certain amount of active material, conductive agent, binder, NMP solvent, current collector, sodium salt, mixed solvent, PEO polymer and PVDF are first selected for use, and the active material is carbon-coated sodium Fast ion conductor material sodium vanadium phosphate, the conductive agent is one or more mixtures of superconducting carbon black, carbon nanotubes and acetylene black, and the binder is one or more of PVDF, PTFE, polyaniline and polyurethane A variety of mixtures, and the current collector is an aluminum foil current collector or a nickel foil current collector;

[0037] Wherein the above-mentioned step two, take by weight respectively 95% active material, 2% conductive agent and 3% binder from the spare ma...

Embodiment 3

[0042] A method for preparing a thin-film sodium ion secondary battery, comprising step 1, selecting raw materials; step 2, spraying and sputtering; step 3, drying and rolling; step 4, stirring; step 5, packaging and molding;

[0043] In the above step 1, a certain amount of active material, conductive agent, binder, NMP solvent, current collector, sodium salt, mixed solvent, PEO polymer and PVDF are first selected for use, and the active material is carbon-coated sodium Fast ion conductor material sodium vanadium phosphate, the conductive agent is one or more mixtures of superconducting carbon black, carbon nanotubes and acetylene black, and the binder is one or more of PVDF, PTFE, polyaniline and polyurethane A variety of mixtures, and the current collector is an aluminum foil current collector or a nickel foil current collector;

[0044] Wherein the above-mentioned step two, take by weight 90% active material, 5% conductive agent and 5% binding agent respectively according ...

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Abstract

The invention discloses a thin film type sodium ion secondary battery and a preparation method thereof. The thin film type sodium ion secondary battery comprises a shell, a positive pole piece and a negative pole piece; the positive pole piece and the negative pole piece are connected through press fit, and the positive pole piece and the negative pole piece are both located in the shell. The preparation method of the thin film type sodium ion secondary battery comprises the following steps of: step 1, raw material selecting; step 2, spraying and sputtering; step 3, drying and rolling; step 4, stirring; and step 5, packaging and forming. According to the thin film type sodium ion secondary battery and the preparation method thereof of the invention, a positive pole material and a negative pole material sprayed and sputtered with turbid liquid are dried, so that a solid electrolyte is formed on the surfaces of the positive pole material and the negative pole material, and the mode that an existing battery adopts a liquid electrolyte is changed, so that the safety performance of the battery is improved; and in the process of the preparation of the battery, the current collectors with residual positive pole slurry and negative pole slurry is subjected to sectional drying treatment, so that the residual positive pole slurry and negative pole slurry sprayed and sputtered on the current collectors can be prevented from falling off.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a thin-film sodium ion secondary battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in various fields such as energy storage, electric vehicles, electric tools, and mobile digital. With the widespread application of lithium-ion batteries, especially the rapid development of the electric vehicle market, lithium resources are consumed in large quantities and will be on the verge of exhaustion. The current lithium-ion battery technology has problems such as high price, poor material stability, and poor long-cycle safety performance in the stage of large-scale energy storage. At the same time, considering the energy consumption of lithium-ion battery material manufacturing, battery production and cycle, the production of 1kWh lithium-ion battery requires about 400kWh of energy and produces about 75kg of carbon dioxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/054H01M4/139H01M4/13
CPCH01M10/054H01M10/058H01M4/13H01M4/139Y02E60/10Y02P70/50
Inventor 韩永斌
Owner DONGGUAN LILONG BATTERY TECH CO LTD
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