Fabrication method of dual-polarity solid-state lithium secondary battery

A secondary battery and bipolar electrode technology, applied in secondary batteries, battery electrodes, electrode carriers/collectors, etc., can solve problems such as limiting battery applications, achieve high safety, controllable voltage, and easy large-scale The effect of production

Inactive Publication Date: 2019-05-17
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the application of bipolar structure in solid-state batteries is more common in thin-film batteries. Thin-layer bipolar thin-film batteries are obtained by physical or chemical deposition, but the effective capacity limits the application of this type of battery in more fields.

Method used

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  • Fabrication method of dual-polarity solid-state lithium secondary battery

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Experimental program
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Effect test

Embodiment 1

[0027] A method for preparing a bipolar solid-state lithium secondary battery comprises stacking and assembling a bipolar electrode, a solid electrolyte layer, and a unipolar electrode in sequence to form a solid-state battery. Specific preparation process:

[0028] (1) Preparation of bipolar current collector

[0029] Cu was deposited on the surface of the aluminum foil by atomic layer deposition (ALD) to form a bipolar current collector.

[0030] Concrete preparation steps are as follows:

[0031] a) Place the aluminum foil pre-cut into 10cm×10cm in the vacuum reaction chamber of the atomic layer deposition equipment, and vacuumize the reaction chamber;

[0032] b) Copper hexafluoroacetylacetone complex (Cu(hfac) 2 ) and methanol as a prepolymer, in an inert gas Ar atmosphere, carry out atomic layer deposition cycle, the deposition temperature is set to 220 ° C, the pressure in the reaction chamber is maintained at 10 Pa, and the deposition thickness is 1 μm;

[0033] c)...

Embodiment 2

[0049] A method for preparing a bipolar solid-state lithium secondary battery comprises stacking and assembling a bipolar electrode, a solid electrolyte layer, and a unipolar electrode in sequence to form a solid-state battery. Specific preparation process:

[0050] 1) Preparation of bipolar current collector

[0051] Cu is deposited on the surface of the aluminum foil by magnetron sputtering to form a bipolar current collector.

[0052] Concrete preparation steps are as follows:

[0053] a) Place the aluminum foil pre-cut into 10cm×10cm in the vacuum reaction chamber of the magnetron sputtering equipment, and vacuumize the reaction chamber;

[0054] b) A copper target is used to carry out a sputtering reaction in an inert gas Ar atmosphere, the reaction temperature is set to normal temperature, the pressure in the reaction chamber is kept at 0.2 Pa, and the deposition thickness is 1 μm;

[0055] c) After the sputtering is finished, fill the vacuum reaction chamber with an ...

Embodiment 3

[0058] A method for preparing a bipolar solid-state lithium secondary battery comprises stacking and assembling a bipolar electrode, a solid electrolyte layer, and a unipolar electrode in sequence to form a solid-state battery. Specific preparation process:

[0059] 1) Preparation of bipolar current collector

[0060] Cu is deposited on the surface of the aluminum foil by physical vapor deposition to form a bipolar current collector.

[0061] Concrete preparation steps are as follows:

[0062] a) Place the aluminum foil pre-cut into 10cm×10cm in the vacuum reaction chamber of the evaporation equipment, and vacuumize the reaction chamber;

[0063] b) Using metal copper as the reaction source, in an inert gas Ar atmosphere, perform physical vapor deposition, the reaction temperature is 1100 ° C, the pressure in the reaction chamber is kept at 0.001 Pa, and the deposition thickness is 2 μm;

[0064] c) After the vapor deposition is finished, fill the vacuum reaction chamber wi...

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Abstract

The invention discloses a fabrication method of a dual-polarity solid-state lithium secondary battery, and belongs to the technical field of a chemical power supply. The used bipolarity current collector is a bipolarity aluminum-plated copper current collector obtained by a physical or chemical deposition method, the thickness and the weight of the bipolarity current collector are controllable; and the used solid-state electrolyte is a high-ion conductivity solid-state electrolyte, and room-temperature or low-temperature working can be achieved. A solid-state electrolyte system is used in thebipolarity structure battery, the problem of internal short circuit brought by a liquid-state electrolyte is effectively prevented, the bipolarity solid-state lithium secondary battery fabricated according to the method proposed by the invention has the remarkably advantages of voltage controllability and high safety, and large-scale production is easy.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a preparation method of a bipolar solid lithium secondary battery. Background technique [0002] The bipolar structure electrode is composed of a conductive matrix in the middle, a positive active material on one side and a negative active material on the other side. Based on this, the battery can be connected in series internally to adjust the voltage as needed. Although the concept of bipolar electrodes has a long history, it has not been widely used in lithium-ion batteries, mainly due to the limitation of the electrolyte system. Since the internal monomer units of the bipolar battery are connected in series, the strong fluid electrolyte and the traditional gel electrolyte that contains a lot of liquid and has poor liquid retention can easily form an electronic conduction path inside the battery, resulting in an internal short circuit. . [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0585H01M4/1395H01M4/38H01M4/66H01M10/0565
CPCY02E60/10Y02P70/50
Inventor 李杨徐志彬赵冬梅桑林丁飞刘兴江
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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