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Method for producing nonaqueous alkali metal electricity storage element

A technology for electric storage components and manufacturing methods, applied in non-aqueous electrolyte storage batteries, electrolyte storage battery manufacturing, electrode manufacturing, etc., capable of solving unrecorded, low-resistance and other problems, and achieving the goals of improving efficiency, suppressing micro-short circuits, and good high-temperature durability Effect

Pending Publication Date: 2021-11-02
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, neither of Patent Documents 3 and 4 describes a production method capable of suppressing micro-short circuits and providing low resistance and good high-temperature durability in a non-aqueous alkali metal energy storage device using an alkali metal compound as a positive electrode precursor.

Method used

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  • Method for producing nonaqueous alkali metal electricity storage element
  • Method for producing nonaqueous alkali metal electricity storage element
  • Method for producing nonaqueous alkali metal electricity storage element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1、1-2

[0742] [Manufacture of non-aqueous lithium storage devices]

[0743] As the positive electrode precursor, the positive electrode precursor 1-1 was used in Example 1-1, and the positive electrode precursor 1-2 was used in Example 1-2.

[0744] [Secondary drying of electrodes]

[0745] The positive electrode precursor was dried by infrared heating at a temperature of 80° C. for 5 minutes, and wound by roll-to-roll at a winding tension of 0.8 N / mm.

[0746] [assembly process]

[0747] For the positive electrode precursor obtained, the positive electrode active material layer is 10.0cm × 10.0cm (100cm 2 ) to cut out 20 positive electrode precursors (double-sided). Then the negative electrode 1-1 is 10.1cm×10.1cm (102cm) with the negative electrode active material layer 2 ) size cut out 21 pieces, prepare 40 pieces 10.3cm×10.3cm (106cm 2 ) polyethylene separator (manufactured by Asahi Kasei, thickness 10 μm). These are stacked in the order of the positive electrode precursor,...

Embodiment 1-3～1-58

[0777] In addition to the type of positive electrode precursor, the type of alkali metal compound, the pressure applied to the non-aqueous lithium storage element precursor in the repressurization process after liquid injection and impregnation, the temperature of the non-aqueous lithium element precursor, and the doping The C rate during constant current (cc: Constant Current) charging, the voltage during constant voltage (cv: Constant Voltage) charging, and the time of cv charging in the process are shown in Table 1-1, Table 1-2, and Table 1-3 Or except those described in Table 1-5, non-aqueous lithium storage elements were produced and evaluated in the same manner as in Example 1-1. The results are shown in Table 1-1, Table 1-2, Table 1-3 or Table 1-5.

Embodiment 2-1、2-2

[0852] [Manufacture of non-aqueous lithium storage devices]

[0853] As the positive electrode precursor, the positive electrode precursor 2-1 was used in Example 2-1, and the positive electrode precursor 2-2 was used in Example 2-2.

[0854] [Secondary drying of electrodes]

[0855] The positive electrode precursor was dried by infrared heating at a temperature of 80° C. for 5 minutes, and wound by roll-to-roll at a winding tension of 0.8 N / mm.

[0856] [assembly process]

[0857] For the positive electrode precursor obtained, the positive electrode active material layer is 10.0cm × 10.0cm (100cm 2 ) to cut out 20 positive electrode precursors (double-sided). Then the negative electrode 2-1 is 10.1cm×10.1cm (102cm) with the negative electrode active material layer 2 ) size cut out 21 pieces, prepare 40 pieces 10.3cm×10.3cm (106cm 2 ) polyethylene separator (manufactured by Asahi Kasei, thickness 10 μm). These are stacked in the order of positive electrode precursor, sep...

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Abstract

The present invention provides a method for producing a nonaqueous alkali metal electricity storage element, which comprises a voltage application step wherein a voltage is applied to a nonaqueous alkali metal electricity storage element precursor in which a positive electrode precursor, a negative electrode, a separator and a nonaqueous electrolyte solution are contained in an outer case. With respect to this method for producing a nonaqueous alkali metal electricity storage element, a positive electrode active material layer of the positive electrode precursor contains a positive electrode active material and an alkali metal compound other than the positive electrode active material; and (1) a pressure is applied to the precursor from the outside before or during the voltage application step; (2) the precursor is heated before or during the voltage application step; (3) in the voltage application step, constant-current charging of the precursor is performed, and constant-voltage charging of the precursor is subsequently performed; (4) the C-rate of the constant-current charging is 1.0 to 100.0 times the discharge capacity (Ah) of the thus-obtained nonaqueous alkali metal electricity storage element; and (5) the voltage value of the constant-voltage charging is 4.20 V or more.

Description

technical field [0001] The present invention relates to a method for manufacturing a non-aqueous alkali metal storage element. Background technique [0002] In recent years, in order to protect the global environment and save resources and effectively use energy, the power stabilization system of wind power generation or late-night power storage system, the distributed power storage system for households based on solar power generation technology, and the power storage system for electric vehicles Electrical systems, etc. have received attention. [0003] The first requirement for batteries used in these power storage systems is high energy density. As a powerful supplement to high energy density batteries that can meet such demands, the development of lithium ion batteries has been actively promoted. [0004] The second requirement is high output characteristics. For example, in a combination of a high-efficiency engine and a power storage system (such as a hybrid electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/62H01M4/64H01M4/66H01G11/06H01G11/50H01G11/68H01G11/70H01G11/84H01G11/86H01M10/052H01M10/0566H01M10/058
CPCH01G11/68H01G11/06H01G11/50H01G11/86Y02P70/50H01M10/05H01M10/446H01M2010/4271H01M10/425H01M10/486H01M10/48H01M50/618Y02E60/10H01M10/058H01M4/0447H01M4/1393H01M10/052H01G11/70H01M4/04H01M10/0525H01M4/0471
Inventor 平川雄一朗平冈浩一森田均木村维摩梅津和照
Owner ASAHI KASEI KK
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