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Sodium-ion solid-state battery and preparation process thereof

A solid-state battery and preparation technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low electrochemical performance, poor thermal stability, poor mechanical stress, etc., and achieve the goal of improving the rate performance Effect

Inactive Publication Date: 2020-11-20
山西穿越光电科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low electrochemical performance, poor thermal stability and poor mechanical stress caused by interface effects in existing sodium ion solid-state battery materials, the present invention provides a simple and effective preparation method with excellent electrochemical performance and high stability , a stable cycle output energy sodium-ion solid-state battery with good mechanical stress

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  • Sodium-ion solid-state battery and preparation process thereof
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  • Sodium-ion solid-state battery and preparation process thereof

Examples

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Effect test

Embodiment 1

[0033] A preparation process for a sodium-ion solid-state battery, comprising the steps of:

[0034] 1) Add 10 parts of graphite microparticles to 0.5 mol / l, 10 L of boric acid aqueous solution, stir for 12 hours, freeze-dry, and pulverize to obtain N, B doped graphite microparticles.

[0035] 2) Take 100 parts of silicon dioxide, add magnesium powder accounting for 30% of the silicon dioxide proportion in an argon atmosphere, and vacuum-calcine for 12 hours, and pulverize to obtain silicon dioxide / silicon nanoparticles.

[0036] 3) Take 60 parts of phenolic resin, 0.1 parts of N, B doped graphite microparticles, 80 parts of silica / silicon nanoparticles, 1 part of sodium niobate, 650 parts of sodium zirconate, and 3 parts of azobenzene, mix and stir to disperse Uniformly form a solid electrolyte precursor, and then thermally spray 5 parts of polyethylene terephthalate on the surface of the formed solid electrolyte precursor to obtain a solid electrolyte.

[0037] 4) To prepar...

Embodiment 2

[0042] A preparation process for a sodium-ion solid-state battery, comprising the steps of:

[0043] 1) Add 10 parts of graphite microparticles to 0.5 mol / l, 10 L of boric acid aqueous solution, stir for 12 hours, freeze-dry, and pulverize to obtain N, B doped graphite microparticles.

[0044]2) Take 80 parts of silicon dioxide, add magnesium powder accounting for 20% of the proportion of silicon dioxide under an argon atmosphere, and vacuum calcinate for 12 hours, and pulverize to obtain silicon dioxide / silicon nanoparticles.

[0045] 3) Take 100 parts of phenolic resin, 0.5 parts of N, B doped graphite microparticles, 80 parts of silica / silicon nanoparticles, 3 parts of sodium niobate, 730 parts of sodium zirconate, and 7 parts of azobenzene, mix and stir to disperse Uniformly form a solid electrolyte precursor, and then thermally spray 2 parts of polyethylene terephthalate on the surface of the formed solid electrolyte precursor to obtain a solid electrolyte.

[0046] 4) T...

Embodiment 3

[0050] A preparation process for a sodium-ion solid-state battery, comprising the steps of:

[0051] 1) Add 10 parts of graphite microparticles to 0.5 mol / l, 10 L of boric acid aqueous solution, stir for 12 hours, freeze-dry, and pulverize to obtain N, B doped graphite microparticles.

[0052] 2) Take 90 parts of silicon dioxide, add magnesium powder accounting for 25% by weight of the silicon dioxide under an argon atmosphere, and vacuum-calcine the reaction for 12 hours, and pulverize to obtain silicon dioxide / silicon nanoparticles.

[0053] 3) Take 70 parts of phenolic resin, 0.3 parts of N, B doped graphite microparticles, 90 parts of silica / silicon nanoparticles, 2 parts of sodium niobate, 700 parts of sodium zirconate, and 5 parts of azobenzene, mix and stir to disperse Uniformly form a solid electrolyte precursor, and then thermally spray 4 parts of polyethylene terephthalate on the surface of the formed solid electrolyte precursor to obtain a solid electrolyte.

[005...

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Abstract

The invention relates to a sodium-ion solid-state battery. The sodium-ion solid-state battery comprises a battery shell, a current collector, a positive electrode material, a negative electrode material and solid electrolyte, the negative electrode material is a metal sodium electrode; the positive electrode material is a metal sulfide material; and the solid electrolyte is a sodium salt metal oxide composite material. The sodium-ion solid-state battery comprises the following components, parts by weight: 60-100 parts of phenolic resin, 80-100 parts of silicon dioxide / silicon nanoparticles, 0.1-0.5 part of N and B doped graphite microparticles, 650-730 parts of sodium zirconate, 1-3 parts of sodium niobate, 2-5 parts of polyethylene glycol terephthalate and 3-7 parts of azobenzene. The silicon dioxide / silicon particles provide a stable channel for ion transmission to improve the rate capability, with the addition of the azobenzene, the interconnection between the crystal lattices can be enhanced, the sodium ion diffusion and migration channels are increased, the graphite micro-particles are N and B doped, and the hot dryness, the lubricity and the electrical conductivity of the graphite are improved through the N and B element doping, such that the cycle performance of the sodium ion solid-state battery is improved, and the industrial production is easily achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of all-solid-state sodium-ion batteries, and in particular relates to a sodium-ion solid-state battery with stable cycle output energy and a preparation process thereof. Background technique [0002] In recent years, rechargeable lithium (Li) batteries, as important energy storage devices, have been widely used in portable electronic devices and electric vehicles due to their high energy density and long cycle life. However, conventional lithium batteries usually have flammable liquid electrolytes, which easily lead to safety issues. A promising solution is to use solid electrolytes instead of conventional liquid electrolytes. In addition, the use of solid electrolytes enables the application of lithium metal anodes and high-voltage cathodes, which can not only prevent the growth of lithium dendrites but also improve the energy density of solid-state lithium batteries. [0003] However, due ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/058H01M10/054H01M10/42B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M10/054H01M10/056H01M10/058H01M10/4235Y02E60/10Y02P70/50
Inventor 温华辉
Owner 山西穿越光电科技有限责任公司
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