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All-solid-state sodium-sulfur battery and preparation method thereof

A sodium-sulfur battery, all-solid-state technology, applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of unsatisfactory electrochemical performance, limited lithium resource reserves, complicated preparation process, etc., and achieve the suppression of polysulfides Shuttle effect, excellent electrochemical performance, and simple production process

Inactive Publication Date: 2020-01-03
GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the deficiencies of the prior art, aiming to solve the shortcomings of the existing lithium-ion batteries, such as limited lithium resource reserves and high cost, as well as the shuttle effect of polysulfides in the existing all-solid-state sodium-sulfur batteries, and the preparation process is complicated , high cost, unsatisfactory electrochemical performance and other issues

Method used

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  • All-solid-state sodium-sulfur battery and preparation method thereof
  • All-solid-state sodium-sulfur battery and preparation method thereof
  • All-solid-state sodium-sulfur battery and preparation method thereof

Examples

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Embodiment 1

[0027] refer to figure 1 , The all-solid-state sodium-sulfur battery provided by the embodiment of the present invention includes: a positive electrode current collector 1, a positive electrode active material layer 2, an all-solid electrolyte layer 3, and a battery negative electrode 4; the positive electrode current collector 1 is a metal foil, a metal alloy or a metal One of the composites; the positive electrode active material layer 2 is a silicate material or a sulfur-carbon composite material; the all-solid electrolyte layer 3 can be dissociated into a composite material of anions and cations; wherein, the positive electrode active material layer includes materials that can allow sodium ions to be freely adsorbed and the extracted material; the negative electrode active material 4 of the battery is metal sodium or an alloy material.

[0028] The battery anode material and solid electrolyte provided by the embodiments of the present invention can effectively adsorb polys...

Embodiment 2-26

[0035] Examples 2-26 and Example 1 The sodium-sulfur battery preparation process steps are the same as Example 1, the difference lies in the different preparation materials or material content, see Table 1 for details.

[0036] Table 1 Example 1-26 Negative electrode material, positive electrode material and solid electrolyte layer comparison

[0037]

[0038]

[0039]

[0040] The form of the all-solid-state sodium-sulfur battery involved in the present invention is not limited to the button battery, and can also be designed into a flat battery, a cylindrical battery and the like according to the core components. The main active components of the sodium ion super battery proposed by the present invention are the positive electrode material capable of adsorbing polysulfides and the electrolyte material capable of transporting sodium ions well between the electrode and the electrolyte interface.

[0041] The positive electrode material and solid electrolyte proposed by...

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Abstract

The invention discloses an all-solid-state sodium-sulfur battery and a preparation method thereof. The all-solid-state sodium-sulfur battery comprises a battery positive electrode, an all-solid-stateelectrolyte layer and a battery negative electrode. The all-solid-state electrolyte layer is an electrolyte sodium salt, and the battery negative electrode comprises a negative electrode active material. The battery positive electrode comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode current collector is a metal, metal alloy ormetal compound conductive material, and the positive electrode active material layer comprises a material capable of allowing anions forming sodium salt to be freely adsorbed and removed. Compared with the existing lithium ion battery, the all-solid-state sodium-sulfur battery uses sodium salt instead of lithium salt, so that the application of the all-solid-state sodium-sulfur battery is not restricted by lithium resources. Polysulfide is generated in the discharge process, and polysulfide ions migrate between the positive electrode and the negative electrode, namely the polysulfide shuttle effect. Talc is of a layered structure and can well adsorb polysulfide of lewis base as a lewis acid, so that the polysulfide shuttle effect can be inhibited.

Description

technical field [0001] The invention relates to the technical field of solid-state batteries, in particular to an all-solid-state sodium-sulfur battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high energy efficiency, long cycle life, no memory effect, fast discharge, etc., so they have huge markets in consumer electronics and electric vehicles, power grid peak regulation, energy storage power supplies, aerospace and other fields need. However, at present, lithium-ion batteries are facing the disadvantages of limited lithium resource reserves and high cost. As a potential energy storage technology to replace lithium-ion batteries, sodium-ion and sodium-metal batteries have attracted increasing attention in recent years, and all-solid-state sodium-sulfur batteries are one of them. Compared with traditional lithium-ion batteries, sodium-sulfur batteries have the advantages of low cost of ...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/058H01M10/054H01M4/62
CPCH01M4/628H01M10/054H01M10/0562H01M10/058Y02E60/10Y02P70/50
Inventor 苏鑫王强曾洪华
Owner GUANGDONG TEAMGIANT NEW ENERGY TECH CORP
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