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Method for in-situ preparation of minisized all-solid-state thin-film lithium-ion battery by using PLD

A lithium-ion battery and in-situ preparation technology, which is applied in the field of lithium-ion battery preparation, can solve the problems that restrict the large-scale popularization and application of all-solid-state thin-film lithium batteries, unfavorable large-scale production, and harsh packaging technology, so as to improve electrochemical performance, Avoid air and water vapor contact, fast and simple preparation method

Active Publication Date: 2016-10-26
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this combined deposition technology can realize the whole vacuum preparation, the interface contact is good, and the battery preparation process does not touch the air, but this method is too cumbersome and is not conducive to large-scale industrial production
In addition, most researchers currently use metallic lithium as the negative electrode when preparing all-solid-state thin-film lithium-ion batteries, but lithium has a low melting point (180°C), which is incompatible with the temperature resistance (250°C) requirements of soldering reflow technology in micro-batteries and integrated circuits. , easy to form dead lithium in cycle charge and discharge
In addition, metal lithium is sensitive to oxygen and water vapor, and requires harsh packaging technology to maintain stability, which seriously restricts the large-scale application of all-solid-state thin-film lithium batteries.

Method used

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  • Method for in-situ preparation of minisized all-solid-state thin-film lithium-ion battery by using PLD
  • Method for in-situ preparation of minisized all-solid-state thin-film lithium-ion battery by using PLD

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A method for preparing miniature all-solid-state thin-film lithium-ion batteries in situ with PLD, specifically comprising the following steps:

[0044] 1) Pretreatment of the substrate:

[0045] a) First, the silicon dioxide substrate 13 is ultrasonically cleaned, and the steps of cleaning are: (i) ultrasonic cleaning in acetone for 20 minutes; (ii) ultrasonic cleaning in ethanol for 20 minutes, and then cleaning several times with deionized water;

[0046] 2) Preparation of target material:

[0047] Preparation of electrolyte Li by PLD 3 PO 4-x N x (LiPON) film, the target used is made of Li 3 PO 4 The powder is pressed and sintered. For the positive electrode LiCoO 2 Thin film, electron transport layer graphene and negative electrode graphite layer, the targets used are all passed through LiCoO 2 , graphene and graphite powder pressed and sintered;

[0048] 3) In situ growth of each layer of thin film of micro battery:

[0049] Schematic diagram of the cross...

Embodiment 2

[0060] Comparative Test. The (iv) step in Embodiment 1 is omitted, and the (v) step is adjusted as follows, and all the other steps are consistent:

[0061] (v) On the same PLD instrument, deposit the negative electrode graphite layer (600nm), the atmosphere is Ar, the air pressure is 0.1Pa, the laser frequency is 6Hz, and the laser energy density is 2.0Jcm -2 , deposited at room temperature.

Embodiment 3

[0063] Comparative Test. The (v) step in embodiment one is omitted, the (iv) step is adjusted as follows, and all the other steps are consistent:

[0064] (iv) On the same PLD instrument, deposit the negative metal lithium layer thin film (600nm). The atmosphere is Ar, the air pressure is 0.1Pa, the laser frequency is 6Hz, and the laser energy density is 2.0Jcm -2 , deposited at room temperature.

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Abstract

The invention discloses a method for in-situ preparation of a minisized all-solid-state thin-film lithium-ion battery by using PLD, belonging to the technical field of lithium-ion batteries. The method comprises the following steps: 1) pretreatment of a substrate: cleaning a silica substrate and drying the substrate for subsequent usage; and 2) preparation of the battery: successively depositing metal platinum used as a current collector, lithium cobalt oxide used as a positive electrode, lithium phosphorus oxynitride used as an electrolyte, graphene used as an electron penetration and transition layer and graphite as a negative electrode film on the cleaned silica substrate in the step 1) by using PLD. The structure of the minisized all-solid-state thin-film lithium-ion battery employs PLD in-situ deposition and introduces graphene as the electron penetration and transition layer between the negative electrode graphite and the solid electrolyte, so the performance and cycle index of the battery can be effectively improved, heat stability of the battery is guaranteed, and heatproof requirements of welding are met.

Description

technical field [0001] The invention relates to a preparation method of a lithium-ion battery, in particular to a method for in-situ preparation of a miniature all-solid-state thin-film lithium-ion battery by using PLD, and belongs to the technical field of lithium-ion batteries. Background technique [0002] With the continuous development of microelectronics, communications, medical implants, military and radio frequency identification and other technical fields, the miniaturization, miniaturization and integration of the corresponding electronic products have become the trend of global technology development. This is an innovation and challenge for batteries, which means that the demand for tiny batteries will increase day by day. At present, the types of micro batteries that are actively being researched at home and abroad include lithium-ion batteries, zinc-nickel batteries, solar cells, and fuel cells. Among them, micro-lithium-ion batteries have attracted extensive a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058C23C14/06C23C14/18C23C14/28
CPCC23C14/06C23C14/0605C23C14/18C23C14/28H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 钱婧王亚平包吴奇
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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