Non-aqueous lithium storage device

A technology for electric storage components and non-aqueous electrolytes, which can be applied to lithium batteries, electrical components, non-aqueous electrolyte batteries, etc., and can solve problems such as the safety risks of electric storage components

Active Publication Date: 2020-06-12
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the inner surface of the metal exterior body or the exhaust valve reacts with the generated HF, and leakage may occur in some cases, thereby posing a risk to the safety of the storage device.

Method used

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preparation example Construction

[0272] The preparation method of the coating liquid of the positive electrode precursor is not particularly limited, and a disperser such as a homodisperser, a multi-shaft disperser, a planetary mixer, a thin film rotary high-speed mixer, and the like 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. When the peripheral speed is 50 m / s or less, various materials are less likely to be damaged by heat or shear force due to dispersion, and re-agglomeration is less likely to occur, which is preferable.

[0273] Regarding the dispersion degree 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 80 μm or l...

Embodiment 1

[0511]

preparation example

[0513] The broken coconut shell carbides were carbonized in a small carbonization furnace at 500° C. for 3 hours under a nitrogen atmosphere to obtain carbides. Put the obtained carbides 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 raise the temperature 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 to remove water. Thereafter, it was dried in an electric dryer maintained at 125°C for 10 hours, and then pulverized with a ball mill for 1 hour to obtain activated carbon 1a 1 .

[0514] For the activated carbon 1a 1 , The average particle diameter was measured using a laser diffraction particle size distribution analyzer (SALD-2000J) manufactured by Shimadzu Corporation, and it was 12.7 μm. In addition, the p...

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Abstract

An object of the present invention is to provide a non-aqueous lithium storage device capable of suppressing excessive decomposition of a lithium compound remaining in a positive electrode, suppressing gas generation at high voltage, and suppressing capacity reduction during high-load charge-discharge cycles. The non-aqueous lithium storage element of the present embodiment includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution, the positive electrode containing a lithium compound other than an active material, the non-aqueous electrolyte solution containing lithium ions, wherein the surface of the positive electrode passes through In the element distribution image obtained by SEM‑EDX, the area repetition rate U of the fluorine distribution image obtained by binarization based on the average value of the luminance value relative to the oxygen distribution image 1 40% or more and 99% or less.

Description

【Technical field】 [0001] The invention relates to a non-aqueous lithium storage element. 【Background technique】 [0002] In recent years, in order to protect the global environment and save resources and effectively use energy, power stabilization systems for wind power generation or late-night power storage systems, distributed power storage systems for households based on solar power generation technology, and power storage systems for electric vehicles Power storage systems and the like are attracting 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, development of lithium-ion batteries has been actively promoted. [0004] The second required item is high output characteristics. For example, in a combination of a high-efficiency engine and a power storage system (such as a hybrid electric vehicle), or a combination of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/46H01G11/06H01M4/1393H01M10/052H01M10/0567H01M10/0585
CPCH01G11/06H01G11/24H01G11/26H01G11/38H01G11/50H01G11/52H01G11/60H01G11/62H01G11/70H01M4/1393H01M10/052H01M10/0567H01M10/0585Y02E60/10Y02T10/70Y02P70/50H01G11/46H01G11/58H01G11/78H01M4/5825H01M10/0525H01M10/0568H01M10/0569H01M2004/028H02J9/00Y02E60/13
Inventor 梅津和照冈田宣宏平冈浩一细木原睦士末富拓
Owner ASAHI KASEI KK
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