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Manufacturing method of nonaqueous lithium storage element

一种蓄电元件、制造方法的技术，应用在非水电解质蓄电池、电解质蓄电池制造、电气元件等方向，能够解决未考虑抑制抑制、能量密度降低、电阻上升等问题

Active Publication Date: 2020-07-14
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, these methods have the following problems: the addition of a lithium compound leads to the suppression of electron conduction between active material particles, resulting in an increase in resistance and a decrease in energy density, so there is room for further improvement in terms of higher output and higher energy density
However, the electrode of Patent Document 5 does not consider at all the suppression of the resistance increase under high-load charge-discharge cycles in the positive electrode containing the lithium compound, and the suppression of gas generation caused by the decomposition of the lithium compound at high voltage.

Method used

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  • Manufacturing method of nonaqueous lithium storage element
  • Manufacturing method of nonaqueous lithium storage element
  • Manufacturing method of nonaqueous lithium storage element

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preparation example Construction

[0268] The preparation of the above-mentioned coating solution for the positive electrode precursor is not particularly limited, and a disperser such as a homogeneous disperser, a multi-shaft disperser, a planetary mixer, a thin film rotary high-speed mixer, etc. can be suitably used. In order to obtain a coating liquid in a good dispersion state, it is preferable to disperse at a peripheral speed of 1 m / s to 50 m / s. When the peripheral speed is 1 m / s or more, various materials can be dissolved or dispersed well, which is preferable. In addition, when the peripheral speed is 50 m / s or less, various materials are not broken by heat or shear force generated by dispersion, and re-agglomeration does not occur, so it is preferable.

[0269] Regarding the degree of dispersion of the coating liquid, the particle size measured by a particle size meter is preferably 0.1 μm or more and 100 μm or less. As the upper limit of the degree of dispersion, the particle size is more preferably ...

Embodiment 1

[0551]

preparation example 1a

[0553] The crushed coconut shell carbides were carbonized in a small carbonization furnace at 500°C for 3 hours in nitrogen to obtain carbides. Put the obtained carbide into the activation furnace, introduce 1 kg / h of water vapor into the activation furnace in the state of being heated by the preheating furnace, and heat up to 900° C. for 8 hours for activation. The activated carbide was taken out and cooled under a nitrogen atmosphere to obtain activated activated carbon. The obtained activated carbon was washed with water for 12 hours, and then water was removed. Thereafter, it was dried in an electric dryer maintained at 125°C for 10 hours, and then pulverized by a ball mill for 1 hour to obtain activated carbon 1a.

[0554] The average particle diameter of this activated carbon 1a was 12.7 μm when measured using a laser diffraction particle size distribution analyzer (SALD-2000J) manufactured by Shimadzu Corporation. In addition, the pore distribution was measured using ...

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Abstract

The invention relates to a manufacturing method OF a non-aqueous lithium storage element. The method comprises following steps: a step for providing a nonaqueous lithium storage element comprising a positive electrode precursor, a negative electrode, a partition plate, a nonaqueous electrolyte solution containing lithium ions, and an exterior body, wherein the positive electrode precursor containsa lithium compound other than an active material; and a step for decomposing the lithium compound contained in the positive electrode precursor by applying a voltage of 4.2 V or more in a state in which a part of the exterior body is open, pre-doping the negative electrode with the lithium ions, and discharging a gas generated by the decomposition of the lithium compound from the opening of the exterior body.

Description

[0001] This application is a divisional application, the international application number of the original application is PCT / JP2017 / 002020, the international application date is January 20, 2017, the Chinese national application number is 201780007112.1, and the date of entry into China is July 18, 2018 , and the name of the invention is "Non-aqueous Lithium Storage Element". technical field [0002] The invention relates to a method for manufacturing a nonaqueous lithium storage element. Background technique [0003] In recent years, from the perspective of protecting the global environment and saving resources and effectively using energy, wind power generation power stabilization systems or late-night power storage systems, household distributed power storage systems based on photovoltaic power generation technology, and electric vehicles Power storage systems and the like are attracting attention. [0004] The first requirement for batteries used in these power storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/06H01G11/24H01G11/26H01G11/50H01G11/70H01M4/1393H01M10/0525H01M10/0566H01M10/058
CPCH01G11/06H01G11/24H01G11/26H01G11/50H01G11/70H01M4/1393H01M10/0525H01M10/0566H01M10/058H01M10/052H01M10/0567H01M10/0585H01G11/34Y02T10/70Y02P70/50H01M4/133H01M4/62H01M10/446Y02E60/13H01G11/84H01G11/78H01M4/364
Inventor 梅津和照冈田宣宏上城武司
Owner ASAHI KASEI KK