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Secondary battery, preparation method thereof and electric equipment

A secondary battery, solid electrolyte technology, applied in secondary batteries, electrolyte battery manufacturing, non-aqueous electrolyte batteries, etc., can solve problems such as inability to withstand high temperatures above 200°C, poor battery high temperature resistance, and poor safety performance , to achieve the effect of low cost, maintaining stability and reducing equipment cost

Active Publication Date: 2019-08-23
THE NORTHERN RES INST OF NJUST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercial lithium batteries use organic liquid electrolytes, which have poor safety performance and are flammable and explosive. With the development of solid electrolyte materials, safe and non-flammable all-solid-state lithium batteries have become the focus of research.
[0003] At present, the preparation of existing all-solid-state thin-film lithium batteries is based on magnetron sputtering and thermal evaporation, and its positive electrode material is generally a lithium-containing compound (made by magnetron sputtering), such as lithium cobaltate, and its negative electrode The material is generally metallic lithium (produced by thermal evaporation), which has strong activity and is difficult to store, and the existing all-solid-state thin-film lithium battery has high material cost, poor high temperature resistance of the battery, and cannot withstand high temperatures above 200°C , it is difficult to use under special conditions

Method used

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  • Secondary battery, preparation method thereof and electric equipment
  • Secondary battery, preparation method thereof and electric equipment
  • Secondary battery, preparation method thereof and electric equipment

Examples

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preparation example Construction

[0084] Further, the preparation method also includes the step of sputtering a current collector on the surface of the molybdenum oxide negative electrode. An existing sputtering process can be used for the current collector, which is not particularly limited in the present invention. For example, when the current collector is titanium and platinum, an optional sputtering process is: when preparing the current collector, use metal titanium and platinum as the target material, and under the condition of flowing Ar gas, plate Fluid collection.

[0085] In a third aspect, at least one embodiment provides an electrical device, including the above-mentioned secondary battery or a secondary battery prepared by the above-mentioned preparation method. The electrical equipment includes the above-mentioned secondary battery, so it has at least the same advantages as the above-mentioned secondary battery, and has the advantages of low cost, easy storage, good cycle performance and high-t...

Embodiment 1

[0089] A secondary battery, comprising a molybdenum trioxide positive electrode, a lithium-containing solid electrolyte, and a molybdenum trioxide negative electrode stacked in sequence, the thickness of the molybdenum trioxide positive electrode and the molybdenum trioxide negative electrode are both 350 nm, and the thickness of the electrolyte is 4 μm. for Li 3 N.

Embodiment 2

[0091] A secondary battery, comprising a molybdenum trioxide positive electrode, a lithium-containing solid electrolyte, and a molybdenum trioxide negative electrode stacked in sequence, the thickness of the molybdenum trioxide positive electrode and the molybdenum trioxide negative electrode are both 380 nm, and the thickness of the electrolyte is 0.6 μm, The electrolyte is Li 3 P.S. 4 .

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Abstract

The invention relates to the field of new energy batteries, and particularly provides a secondary battery, a preparation method thereof and electric equipment. The secondary battery comprises a molybdenum oxide positive electrode, a lithium-containing solid electrolyte and a molybdenum oxide negative electrode which are laminated in sequence. The structure of the secondary battery is a lithium-free symmetrical battery structure, the positive electrode and the negative electrode of the battery are low in price, the electrode stability is good, the secondary battery is easy to store, the first coulomb efficiency of the battery is 96% or above on average, 80% or above of capacity can still be kept after 3000 cycles, and meanwhile, the secondary battery is excellent in high and low temperatureperformance and easy to store. And the stability can still be kept when working at the temperature of 50-400 DEG C, and the capacity is about two times of that at the normal temperature.

Description

technical field [0001] The invention relates to the field of new energy batteries, in particular to a secondary battery, a preparation method thereof, and an electrical device. Background technique [0002] Due to its high specific capacity and energy density, long cycle life, high working voltage, and no memory effect, lithium-ion batteries are widely used in consumer electronics, power tools, medical electronics, electric vehicles, rail transit, aerospace, and large-scale applications. Renewable energy access, power grid peak regulation and frequency regulation, and distributed energy storage have been widely used. At present, commercial lithium batteries use organic liquid electrolytes, which have poor safety performance and are flammable and explosive. With the development of solid-state electrolyte materials, safe and non-flammable all-solid-state lithium batteries have become the focus of research. [0003] At present, the preparation of existing all-solid-state thin-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0562
CPCH01M10/058H01M10/0562H01M2300/0071Y02E60/10Y02P70/50
Inventor 夏晖孙硕夏求应昝峰徐璟岳继礼
Owner THE NORTHERN RES INST OF NJUST
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